My application is set in info.plist to support only portrait mode.
However, the UIImagePickerController, rotates when the user rotates the screen to landscape.
Since in io6 the method shouldAutoRotate is not being called, I tried to extend it like this:
#interface NonRotatingUIImagePickerController : UIImagePickerController
#end
#implementation NonRotatingUIImagePickerController
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskPortrait;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationMaskPortrait;
}
#end
But it doesn't help. Any idea why?
And in the log I see the above methods being called. The UIImagePickerController at first is displayed in portrait and when the user rotates - it rotates as well instead of staying portrait.
I set the image picker in the view like this:
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (!self.imagePickerController) {
self.imagePickerController = [[NonRotatingUIImagePickerController alloc] init];
self.imagePickerController.delegate = self;
}
return self;
}
- (void)viewDidAppear:(BOOL)animated{
self.imagePickerController.showsCameraControls = NO;
CGRect imagePickerControllerFrame = CGRectMake(0, topBar.frame.size.height, self.view.frame.size.width, self.view.frame.size.height - topBar.frame.size.height - bottomBar.frame.size.height);
self.imagePickerController.view.frame = imagePickerControllerFrame;
self.imagePickerController.allowsEditing = YES;
self.imagePickerController.view.clipsToBounds = YES;
self.imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera
[self.view.window addSubview:self.imagePickerController.view];
}
self.imagePickerController.view.frame = imagePickerControllerFrame;
// ...
[self.view.window addSubview:self.imagePickerController.view];
Well, that's all totally illegitimate. Apple makes this very clear in the docs:
This class is intended to be used as-is and does not support subclassing. The view hierarchy for this class is private and must not be modified
There is only one correct way to use an image picker controller that uses UIImagePickerControllerSourceTypeCamera - as a fullscreen presented view controller:
BOOL ok = [UIImagePickerController isSourceTypeAvailable:
UIImagePickerControllerSourceTypeCamera];
if (!ok) {
NSLog(#"no camera");
return;
}
NSArray* arr = [UIImagePickerController availableMediaTypesForSourceType:
UIImagePickerControllerSourceTypeCamera];
if ([arr indexOfObject:(NSString*)kUTTypeImage] == NSNotFound) {
NSLog(#"no stills");
return;
}
UIImagePickerController* picker = [UIImagePickerController new];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.mediaTypes = #[(NSString*)kUTTypeImage];
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];
If you want to present a live picture-taking interface inside your own interface, use AVFoundation and the camera capture API that it gives you.
Downloadable working example here:
https://github.com/mattneub/Programming-iOS-Book-Examples/blob/master/ch30p816cameraCaptureWithAVFoundation/p683cameraCaptureWithAVFoundation/ViewController.m
Perhaps you'll consider this answer unhelpful; but I'll just paste a snippet from Apple's documentation:
Important: The UIImagePickerController class supports portrait mode only. This class is intended to be used as-is and does not support subclassing. The view hierarchy for this class is private and must not be modified, with one exception. You can assign a custom view to the cameraOverlayView property and use that view to present additional information or manage the interactions between the camera interface and your code.
UIImagePickerController Doc Link
Sorry to be a kill-joy. You should look for a replacement class. Quickie search shows there are a bunch.
I have a UIPopoverController hosting a UINavigationController, which contains a small hierarchy of view controllers.
I followed the docs and for each view controller, I set the view's popover-context size like so:
[self setContentSizeForViewInPopover:CGSizeMake(320, 500)];
(size different for each controller)
This works as expected as I navigate forward in the hierarchy-- the popover automatically animates size changes to correspond to the pushed controller.
However, when I navigate "Back" through the view stack via the navigation bar's Back button, the popover doesn't change size-- it remains as large as the deepest view reached. This seems broken to me; I'd expect the popover to respect the sizes that are set up as it pops through the view stack.
Am I missing something?
Thanks.
I was struggling with the same issue. None of the above solutions worked for me pretty nicely, that is why I decided to do a little investigation and find out how this works.
This is what I discovered:
When you set the contentSizeForViewInPopover in your view controller it won't be changed by the popover itself - even though popover size may change while navigating to different controller.
When the size of the popover will change while navigating to different controller, while going back, the size of the popover does not restore
Changing size of the popover in viewWillAppear gives very strange animation (when let's say you popController inside the popover) - I'd not recommend it
For me setting the hardcoded size inside the controller would not work at all - my controllers have to be sometimes big sometimes small - controller that will present them have the idea about the size though
A solution for all that pain is as follows:
You have to reset the size of currentSetSizeForPopover in viewDidAppear. But you have to be careful, when you will set the same size as was already set in field currentSetSizeForPopover then the popover will not change the size. For this to happen, you can firstly set the fake size (which will be different than one which was set before) followed by setting the proper size. This solution will work even if your controller is nested inside the navigation controller and popover will change its size accordingly when you will navigate back between the controllers.
You could easily create category on UIViewController with the following helper method that would do the trick with setting the size:
- (void) forcePopoverSize {
CGSize currentSetSizeForPopover = self.contentSizeForViewInPopover;
CGSize fakeMomentarySize = CGSizeMake(currentSetSizeForPopover.width - 1.0f, currentSetSizeForPopover.height - 1.0f);
self.contentSizeForViewInPopover = fakeMomentarySize;
self.contentSizeForViewInPopover = currentSetSizeForPopover;
}
Then just invoke it in -viewDidAppear of desired controller.
Here's how I solved it for iOS 7 and 8:
In iOS 8, iOS is silently wrapping the view you want in the popover into the presentedViewController of the presentingViewController view controller. There's a 2014 WWDC video explaining what's new with the popovercontroller where they touch on this.
Anyways, for view controllers presented on the navigation controller stack that all want their own sizing, these view controllers need (under iOS 8) to call this code to dynamically set the preferredContentSize:
self.presentingViewController.presentedViewController.preferredContentSize = CGSizeMake(320, heightOfTable);
Replace heightOfTable with your computed table or view height.
In order to avoid a lot of duplicate code and to create a common iOS 7 and iOS 8 solution, I created a category on UITableViewController to perform this work when viewDidAppear is called in my tableviews:
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self setPopOverViewContentSize];
}
Category.h:
#import <UIKit/UIKit.h>
#interface UITableViewController (PreferredContentSize)
- (void) setPopOverViewContentSize;
#end
Category.m:
#import "Category.h"
#implementation UITableViewController (PreferredContentSize)
- (void) setPopOverViewContentSize
{
[self.tableView layoutIfNeeded];
int heightOfTable = [self.tableView contentSize].height;
if (heightOfTable > 600)
heightOfTable = 600;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
if ([[[UIDevice currentDevice] systemVersion] floatValue] < 8.0)
self.preferredContentSize=CGSizeMake(320, heightOfTable);
else
self.presentingViewController.presentedViewController.preferredContentSize = CGSizeMake(320, heightOfTable);
}
}
#end
This is an improvement on krasnyk's answer.
Your solution is great, but it isn't smoothly animated.
A little improvement gives nice animation:
Remove last line in the - (void) forcePopoverSize method:
- (void) forcePopoverSize {
CGSize currentSetSizeForPopover = self.contentSizeForViewInPopover;
CGSize fakeMomentarySize = CGSizeMake(currentSetSizeForPopover.width - 1.0f, currentSetSizeForPopover.height - 1.0f);
self.contentSizeForViewInPopover = fakeMomentarySize;
}
Put [self forcePopoverSize] in - (void)viewWillAppear:(BOOL)animated method:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self forcePopoverSize];
}
And finally - set desired size in - (void)viewDidAppear:(BOOL)animated method:
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
CGSize currentSetSizeForPopover = self.contentSizeForViewInPopover;
self.contentSizeForViewInPopover = currentSetSizeForPopover;
}
You need to set the content size again in viewWillAppear. By calling the delagate method in which you set the size of popovercontroller. I had also the same issue. But when I added this the problem solved.
One more thing: if you are using beta versions lesser than 5. Then the popovers are more difficult to manage. They seem to be more friendly from beta version 5. It's good that final version is out. ;)
Hope this helps.
In the -(void)viewDidLoad of all the view controllers you are using in navigation controller, add:
[self setContentSizeForViewInPopover:CGSizeMake(320, 500)];
I reset the size in the viewWillDisappear:(BOOL)animated method of the view controller that is being navigated back from:
-(void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
CGSize contentSize = [self contentSizeForViewInPopover];
contentSize.height = 0.0;
self.contentSizeForViewInPopover = contentSize;
}
Then when the view being navigated back to appears, I reset the size appropriately:
-(void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
CGSize contentSize;
contentSize.width = self.contentSizeForViewInPopover.width;
contentSize.height = [[self.fetchedResultsController fetchedObjects] count] * self.tableView.rowHeight;
self.contentSizeForViewInPopover = contentSize;
}
For iOS 8 the following works:
- (void) forcePopoverSize {
CGSize currentSetSizeForPopover = self.preferredContentSize;
CGSize fakeMomentarySize = CGSizeMake(currentSetSizeForPopover.width - 1.0f, currentSetSizeForPopover.height - 1.0f);
self.preferredContentSize = fakeMomentarySize;
self.navigationController.preferredContentSize = fakeMomentarySize;
self.preferredContentSize = currentSetSizeForPopover;
self.navigationController.preferredContentSize = currentSetSizeForPopover;
}
BTW I think, this should be compatible with previous iOS versions...
Well i worked out. Have a look.
Made a ViewController in StoryBoard. Associated with PopOverViewController class.
import UIKit
class PopOverViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.preferredContentSize = CGSizeMake(200, 200)
self.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .Done, target: self, action: "dismiss:")
}
func dismiss(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
}
See ViewController:
//
// ViewController.swift
// iOS8-PopOver
//
// Created by Alvin George on 13.08.15.
// Copyright (c) 2015 Fingent Technologies. All rights reserved.
//
import UIKit
class ViewController: UIViewController, UIPopoverPresentationControllerDelegate
{
func showPopover(base: UIView)
{
if let viewController = self.storyboard?.instantiateViewControllerWithIdentifier("popover") as? PopOverViewController {
let navController = UINavigationController(rootViewController: viewController)
navController.modalPresentationStyle = .Popover
if let pctrl = navController.popoverPresentationController {
pctrl.delegate = self
pctrl.sourceView = base
pctrl.sourceRect = base.bounds
self.presentViewController(navController, animated: true, completion: nil)
}
}
}
override func viewDidLoad(){
super.viewDidLoad()
}
#IBAction func onShow(sender: UIButton)
{
self.showPopover(sender)
}
func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
return .None
}
}
Note: The func showPopover(base: UIView) method should be placed before ViewDidLoad. Hope it helps !
For me this solutions works.
This is a method from my view controller which extends UITableViewController and is the root controller for UINavigationController.
-(void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
self.contentSizeForViewInPopover = self.tableView.bounds.size;
}
And don't forget to set content size for view controller you gonna push into navigation stack
- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath{
dc = [[DetailsController alloc] initWithBookmark:[[bookmarksArray objectAtIndex:indexPath.row] retain] bookmarkIsNew:NO];
dc.detailsDelegate = self;
dc.contentSizeForViewInPopover = self.contentSizeForViewInPopover;
[self.navigationController pushViewController:dc animated:YES];
}
if you can imagine the assambler, I think this is slightly better:
- (void) forcePopoverSize {
CGSize currentSetSizeForPopover = self.contentSizeForViewInPopover;
self.contentSizeForViewInPopover = CGSizeMake(0, 0);
self.contentSizeForViewInPopover = currentSetSizeForPopover;
}
The accepted answer is not working fine with iOS 8. What I did was creating my own subclass of UINavigationController for use in that popover and override the method preferredContentSize in this way:
- (CGSize)preferredContentSize {
return [[self.viewControllers lastObject] preferredContentSize];
}
Moreover, instead of calling forcePopoverSize (method implemented by #krasnyk) in viewDidAppear I decided to set a viewController (which shows popover) as a delegate for previously mentioned navigation (in popover) and do (what force method does) in:
-(void)navigationController:(UINavigationController *)navigationController
didShowViewController:(UIViewController *)viewController
animated:(BOOL)animated
delegate method for a passed viewController. One important thing, doing forcePopoverSize in a UINavigationControllerDelegate method is fine if you do not need that animation to be smooth if so then do leave it in viewDidAppear.
I was facing same problem, but you don't want to set contentsize in viewWillAppear or viewWillDisappear method.
AirPrintController *airPrintController = [[AirPrintController alloc] initWithNibName:#"AirPrintController" bundle:nil];
airPrintController.view.frame = [self.view frame];
airPrintController.contentSizeForViewInPopover = self.contentSizeForViewInPopover;
[self.navigationController pushViewController:airPrintController animated:YES];
[airPrintController release];
set contentSizeForViewInPopover property for that controller before pushing that controller to navigationController
I've had luck by putting the following in the viewdidappear:
[self.popoverController setPopoverContentSize:self.contentSizeForViewInPopover animated:NO];
Although this may not animate nicely in the case when you're pushing/popping different-sized popovers. But in my case, works perfectly!
All that you have to do is:
-In the viewWillAppear method of the popOvers contentView, add the snippet given below. You will have to specify the popOver's size first time when it is loaded.
CGSize size = CGSizeMake(width,height);
self.contentSizeForViewInPopover = size;
I had this issue with a popover controller whose popoverContentSize = CGSizeMake(320, 600) at the start, but would get larger when navigating through its ContentViewController (a UINavigationController).
The nav controller was only pushing and popping custom UITableViewControllers, so in my custom table view controller class's viewDidLoad i set self.contentSizeForViewInPopover = CGSizeMake(320, 556)
The 44 less pixels are to account for the Nav controller's nav bar, and now I don't have any issues anymore.
Put this in all view controllers you are pushing inside the popover
CGSize currentSetSizeForPopover = CGSizeMake(260, 390);
CGSize fakeMomentarySize = CGSizeMake(currentSetSizeForPopover.width - 1.0f,
currentSetSizeForPopover.height - 1.0f);
self.contentSizeForViewInPopover = fakeMomentarySize;
self.contentSizeForViewInPopover = currentSetSizeForPopover;
Faced the same issue and fixed it by setting content view size to navigation controller and view controller before the init of UIPopoverController was placed.
CGSize size = CGSizeMake(320.0, _options.count * 44.0);
[self setContentSizeForViewInPopover:size];
[self.view setFrame:CGRectMake(0.0, 0.0, size.width, size.height)];
[navi setContentSizeForViewInPopover:size];
_popoverController = [[UIPopoverController alloc] initWithContentViewController:navi];
I'd just like to offer up another solution, as none of these worked for me...
I'm actually using it with this https://github.com/nicolaschengdev/WYPopoverController
When you first call your popup use this.
if ([sortTVC respondsToSelector:#selector(setPreferredContentSize:)]) {
sortTVC.preferredContentSize = CGSizeMake(popoverContentSortWidth,
popoverContentSortHeight);
}
else
{
sortTVC.contentSizeForViewInPopover = CGSizeMake(popoverContentSortWidth,
popoverContentSortHeight);
}
Then in that popup use this.
-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:YES];
if ([self respondsToSelector:#selector(setPreferredContentSize:)]) {
self.preferredContentSize = CGSizeMake(popoverContentMainWidth,
popoverContentMainheight);
}
else
{
self.contentSizeForViewInPopover = CGSizeMake(popoverContentMainWidth,
popoverContentMainheight);
}
}
-(void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:YES];
self.contentSizeForViewInPopover = CGSizeZero;
}
Then repeat for child views...
This is the correct way in iOS7 to do this,
Set the preferred content size in viewDidLoad in each view controller in the navigation stack (only done once). Then in viewWillAppear get a reference to the popover controller and update the contentSize there.
-(void)viewDidLoad:(BOOL)animated
{
...
self.popoverSize = CGSizeMake(420, height);
[self setPreferredContentSize:self.popoverSize];
}
-(void)viewWillAppear:(BOOL)animated
{
...
UIPopoverController *popoverControllerReference = ***GET REFERENCE TO IT FROM SOMEWHERE***;
[popoverControllerReference setPopoverContentSize:self.popoverSize];
}
#krasnyk solution worked well in previous iOS versions but not working in iOS8. The following solution worked for me.
- (void) forcePopoverSize {
CGSize currentSetSizeForPopover = self.preferredContentSize;
//Yes, there are coupling. We need to access the popovercontroller. In my case, the popover controller is a weak property in the app's rootVC.
id mainVC = [MyAppDelegate appDelegate].myRootVC;
if ([mainVC valueForKey:#"_myPopoverController"]) {
UIPopoverController *popover = [mainVC valueForKey:#"_myPopoverController"];
[popover setPopoverContentSize:currentSetSizeForPopover animated:YES];
}
}
It is not the best solution, but it works.
The new UIPopoverPresentationController also has the resizing issue :( .
You need to set the preferredContentSizeproperty of the NavigationController in viewWillAppear:
-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.navigationController.preferredContentSize = CGSizeMake(320, 500);}
Is it possible to pop up an UIViewController (xib file) like UIPopOverControl in iPad ?
I have a separate NIB file which is linked to an UIViewController. I want to popup that NIB file along with the button pressed with a customised size (200,200).
Is this possible?
I am trying to get something like this on the iPhone - http://www.freeimagehosting.net/c219p
You can also use one of these custom made clases to show a popup:
https://github.com/sonsongithub/PopupView
https://github.com/werner77/WEPopover
https://github.com/50pixels/FPPopover
Example with FPPopover:
//the view controller you want to present as popover
YourViewController *controller = [[YourViewController alloc] init];
//our popover
FPPopoverController *popover = [[FPPopoverController alloc] initWithViewController:controller];
//the popover will be presented from the okButton view
[popover presentPopoverFromView:okButton];
//release if you arent using ARC
[controller release];
yes it is. load Your pOpOver controller lazily at the point when it is needed. add its view as a subview (you could animate the addition). make its frame size what You need and add the image You have shown as a background subview of the pOpOver controller along with other controls You want in the pop up.
good luck
UPDATE:
alright, ii will show You how ii do this in my app Lucid Reality Check (deployment target iOS4.3).
one can use a UIPopoverController to present another controllers view. what ii do first is to make sure ii always know the current orientation of the device, so ii can reposition the popup on rotation (maybe this works by itself on iOS6?). so in my base controller (from where ii want to show a popup) ii have an instance variable like this:
UIInterfaceOrientation toOrientation;
and also:
UIPopoverController *popover;
UIButton *popover_from_button;
BOOL representPopover;
popover will be reused for all popups, and popover_from_button will hold the button from which the popup is initiated.
then the next code comes into the base controller:
- (void)popoverWillRotate {
if ([popover isPopoverVisible]) {
[self dismissPopover];
representPopover = YES;
}
}
- (void)popoverDidRotate {
if (popover && representPopover) {
representPopover = NO;
[self representPopover];
}
}
these two methods have to be called every time the device is rotated, like this:
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
//DLOG(#"willRotateTo %i", toInterfaceOrientation);
toOrientation = toInterfaceOrientation;
if ([Kriya isPad ]) {
[self popoverWillRotate];
}
}
as one can see, first the orientation is captured then popoverWillRotate is called. this would hide the popover during the orientation animation. and after rotating, the popover must be redisplayed like this:
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {
//DLOG(#"didRotateFrom %i", fromInterfaceOrientation);
//[self layout:toOrientation]; //do some layout if You need
if ([Kriya isPad]) {
[self popoverDidRotate];
}
}
- (void)layout:(UIInterfaceOrientation)toInterfaceOrientation {
//one can do view layout here, and call other controllers to do their layout too
}
now that the orientation changes are worked out, the code for presenting the popover arrives here:
#pragma mark Popovers
- (void)presentPopoverWith:(id)controller fromButton:(UIButton*)button {
if (popover)
[popover release];
if (popover_from_button)
[popover_from_button release];
popover_from_button = [button retain];
popover = [[UIPopoverController alloc] initWithContentViewController:controller];
[popover setDelegate:self];
[self representPopover];
}
- (void)representPopover{
if (popover) {
UIPopoverArrowDirection arrowDirection = UIPopoverArrowDirectionAny;
UIViewController *vc = (UIViewController*)[popover contentViewController];
CGSize contentSize = [vc contentSizeForViewInPopover];
if (contentSize.width > 0 && contentSize.height > 0) {
[popover setPopoverContentSize:contentSize animated:NO];
}
//DLOG(#"representPopover rect:%#", [Kriya printRect:popover_from_button.frame]);
[popover presentPopoverFromRect:CGRectOffset(popover_from_button.frame, 0, popover_from_button.frame.size.height + 7.0) inView:self.view permittedArrowDirections:arrowDirection animated:YES];
}
}
- (void)dismissPopover {
if (popover) {
[popover dismissPopoverAnimated:YES];
}
}
finally, if one wants to be notified when the popover is dismissed, the base controller must implement a delegate method:
#pragma mark UIPopoverControllerDelegate
- (void)popoverControllerDidDismissPopover:(UIPopoverController *)popoverController {
//do something important here like drink some water
}
and don't forget to make the base controller a UIPopoverControllerDelegate in its header.
a use case for this way of doing popups would then look like this:
- (void)takeImage {
UIImagePickerController *picker = [[[UIImagePickerController alloc] init] autorelease];
[picker setDelegate:self];
[picker setAllowsEditing:NO];
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
[picker setSourceType:UIImagePickerControllerSourceTypeCamera];
if ([Kriya isPad]) {
[self presentPopoverWith:picker fromButton:backgroundImageButton];
} else {
//modals on iPhone/iPod
//DLOG(#"takeImage addSubview picker");
[self presentModalViewController:picker animated:YES];
}
} else {
//DLOG(#"no camera");
}
}
this would use an image picker as the content for the popup, but one can use any controller with a valid view. so just do this:
[self presentPopoverWith:popupsContentController fromButton:tappedButton];
one should not have any missing information, :), the method [Kriya isPad] is just this:
+ (BOOL)isPad {
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 30200
// iPad capable OS
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
//this is an iPad
return YES;
}else {
//this is an iPod/iPhone
return NO;
}
#else
//can not pissible be iPad
return NO;
#endif
}
ENJOY!
I've got a QuickLook view that I view some of my app's documents in. It works fine, but I'm having my share of trouble closing the view again. How do I create a touch event / gesture recognizer for which I can detect when the user wants to close the view?
I tried the following, but no events seem to trigger when I test it.
/------------------------ [ TouchPreviewController.h ]---------------------------
#import <Quicklook/Quicklook.h>
#interface TouchPreviewController : QLPreviewController
#end
//------------------------ [ TouchPreviewController.m ]---------------------------
#import "TouchPreviewController.h"
#implementation TouchPreviewController
- (id)init:(CGRect)aRect {
if (self = [super init]) {
// We set it here directly for convenience
// As by default for a UIImageView it is set to NO
UITapGestureRecognizer *singleFingerDTap = [[UITapGestureRecognizer alloc]
initWithTarget:self action:#selector(handleSingleDoubleTap:)];
singleFingerDTap.numberOfTapsRequired = 2;
[self.view addGestureRecognizer:singleFingerDTap];
[self.view setUserInteractionEnabled:YES];
[self.view setMultipleTouchEnabled:YES];
//[singleFingerDTap release];
}
return self;
}
- (IBAction)handleSingleDoubleTap:(UIGestureRecognizer *) sender {
CGPoint tapPoint = [sender locationInView:sender.view.superview];
[UIView beginAnimations:nil context:NULL];
sender.view.center = tapPoint;
[UIView commitAnimations];
NSLog(#"TouchPreviewController tap!" ) ;
}
// I also tried adding this
- (BOOL)gestureRecognizer:(UIGestureRecognizer *) gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer*) otherGestureRecognizer {
return YES;
}
#end
Edit: For clarification, this is how I instantiate the controller:
documents = [[NSArray alloc] initWithObjects: filename , nil ] ;
preview = [[TouchPreviewController alloc] init];
preview.dataSource = self;
preview.delegate = self;
//set the frame from the parent view
CGFloat w= backgroundViewHolder.frame.size.width;
CGFloat h= backgroundViewHolder.frame.size.height;
preview.view.frame = CGRectMake(0, 0,w, h);
//refresh the preview controller
[preview reloadData];
[[preview view] setNeedsLayout];
[[preview view] setNeedsDisplay];
[preview refreshCurrentPreviewItem];
//add it
[quickLookView addSubview:preview.view];
Also, I've defined the callback methods as this:
- (NSInteger) numberOfPreviewItemsInPreviewController: (QLPreviewController *) controller
{
return [documents count];
}
- (id <QLPreviewItem>) previewController: (QLPreviewController *) controller previewItemAtIndex: (NSInteger) index
{
return [NSURL fileURLWithPath:[documents objectAtIndex:index]];
}
Edit2: One thing i noticed. If I try making swiping gestures, I get the following message. This could shed some light on what is wrong/missing?
Ignoring call to [UIPanGestureRecognizer setTranslation:inView:] since
gesture recognizer is not active.
I think your example code is incomplete. It isn't clear how you are instantiating the TouchPreviewController (storyboard, nib file or loadView.)
I have never used the class so I could be way out in left field.
If you've already instantiated a UITapGestureRecognizer in the parent viewController, it is absorbing the tap events and they aren't passed on to your TouchPreviewController.
I would implement the view hierarchy differently by attaching the UITapGestureRecognizer to the parent viewController and handle presentation and unloading of the QLPreviewController there.
I think you might not have to subclass QLPreviewController by instantiating the viewController from a nib file.
When your parent viewController's UITapGestureRecognizer got an event you would either push the QLPreviewController on the navigation stack or pop it off the navigation stack when done.
Hope this is of some help.
I have a mac cocoa app with a webview that contains some text. I would like to search through that text using the default find bar provided by NSTextFinder. As easy as this may seem reading through the NSTextFinder class reference, I cannot get the find bar to show up. What am I missing?
As a sidenote:
- Yes, I tried setting findBarContainer to a different view, same thing. I reverted back to the scroll view to eliminate complexity in debugging
- performTextFinderAction is called to perform the find operation
**App Delegate:**
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
self.textFinderController = [[NSTextFinder alloc] init];
self.webView = [[STEWebView alloc] initWithFrame:CGRectMake(0, 0, self.window.frame.size.width, 200)];
[[self.window contentView] addSubview:self.webView];
[self.textFinderController setClient:self.webView];
[self.textFinderController setFindBarContainer:self.webView.enclosingScrollView];
[[self.webView mainFrame] loadHTMLString:#"sample string" baseURL:NULL];
}
- (IBAction)performTextFinderAction:(id)sender {
[self.textFinderController performAction:[sender tag]];
}
**STEWebView**
#interface STEWebView : WebView <NSTextFinderClient>
#end
#implementation STEWebView
- (id)initWithFrame:(NSRect)frame
{
self = [super initWithFrame:frame];
if (self) {
}
return self;
}
- (void)drawRect:(NSRect)dirtyRect
{
// Drawing code here.
}
- (NSUInteger) stringLength {
return [[self stringByEvaluatingJavaScriptFromString:#"document.documentElement.textContent"] length];
}
- (NSString *)string {
return [self stringByEvaluatingJavaScriptFromString:#"document.documentElement.textContent"];
}
In my tests, WebView.enclosingScrollView was null.
// [self.textFinderController setFindBarContainer:self.webView.enclosingScrollView];
NSLog(#"%#", self.webView.enclosingScrollView);
Using the following category on NSView, it is possible to find the nested subview that extends NSScrollView, and set that as the container, allowing the NSTextFinder to display beautifully within a WebView
#interface NSView (ScrollView)
- (NSScrollView *) scrollView;
#end
#implementation NSView (ScrollView)
- (NSScrollView *) scrollView {
if ([self isKindOfClass:[NSScrollView class]]) {
return (NSScrollView *)self;
}
if ([self.subviews count] == 0) {
return nil;
}
for (NSView *subview in self.subviews) {
NSView *scrollView = [subview scrollView];
if (scrollView != nil) {
return (NSScrollView *)scrollView;
}
}
return nil;
}
#end
And in your applicationDidFinishLaunching:aNotification:
[self.textFinderController setFindBarContainer:[self scrollView]];
To get the Find Bar to appear (as opposed to the default Find Panel), you simply have to use the setUsesFindBar: method.
In your case, you'll want to do (in your applicationDidFinishLaunching:aNotification method):
[textFinderController setUsesFindBar:YES];
//Optionally, incremental searching is a nice feature
[textFinderController setIncrementalSearchingEnabled:YES];
Finally got this to show up.
First set your NSTextFinder instances' client to a class implementing the <NSTextFinderClient> protocol:
self.textFinder.client = self.textFinderController;
Next, make sure your NSTextFinder has a findBarContainer set to the webView category described by Michael Robinson, or get the scrollview within the webView yourself:
self.textFinder.findBarContainer = [self.webView scrollView];
Set the find bar position above the content (or wherever you wish):
[self.webView scrollView].findBarPosition = NSScrollViewFindBarPositionAboveContent;
Finally, tell it to show up:
[self.textFinder performAction:NSTextFinderActionShowFindInterface];
It should show up in your webView:
Also, not sure if it makes a difference, but I have the NSTextFinder in the XIB, with a referencing outlet:
#property (strong) IBOutlet NSTextFinder *textFinder;
You may also be able to get it by simply initing it like normal: self.textFinder = [[NSTextFinder alloc] init];