I'm writing an iPad app and one of my screens has lots of small buttons that when pressed will display one sentence of text in a popover originating from that button. Currently all popovers are created using the storyboard and I store the popover controller in my UIViewController as such:
#property (nonatomic, strong) UIPopoverController *myPopoverController;
- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue isKindOfClass:[UIStoryboardPopoverSegue class]])
{
UIStoryboardPopoverSegue *popoverSegue = (UIStoryboardPopoverSegue *)segue;
self.myPopoverController = popoverSegue.popoverController;
}
}
However, I can't figure out a good way to deal with rotation. Right my didRotate method looks like so:
- (void) didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
if (self.myPopoverController)
{
[self.myPopoverController dismissPopoverAnimated: NO];
[self.myPopoverController presentPopoverFromRect:?????? inView:self.view permittedArrowDirections:UIPopoverArrowDirectionDown animated:NO];
}
}
However, I don't know where to present the popovers from given that they could have originated from any of the small buttons on my screen. Any suggestions? Remember that these are VERY simple popovers, thus a whole bunch of new code is not ideal.
Your best bet may be to make another property in your main view controller that keeps a reference to the button pressed. Something like:
#property (nonatomic, strong) UIPopoverController *myPopoverController;
#property (nonatomic, weak) UIView *popoverButton;
- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue isKindOfClass:[UIStoryboardPopoverSegue class]])
{
UIStoryboardPopoverSegue *popoverSegue = (UIStoryboardPopoverSegue *)segue;
self.myPopoverController = popoverSegue.popoverController;
//The sender in prepareForSegue should be the view used to initiate the segue.
popoverButton = (UIView *)sender;
}
}
That done, you can modify your rotation code thusly:
- (void) didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
if (self.myPopoverController)
{
[self.myPopoverController dismissPopoverAnimated: NO];
[self.myPopoverController presentPopoverFromRect:popoverButton.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionDown animated:NO];
}
}
Keeping a reference to the pressed button takes up no more resources that storing a pointer, and keeping the reference weak should avoid retain cycles (after all, your view controller does not own the button, the button's superview owns it).
Related
Lets say I have a UIViewController with two buttons, both going (push) to another UIViewController that has two UIWebViews (showing two different PDF files), how can I make sure that only the one I choose via the button is showed?
You need to pass some information to the UIViewController which has the UIWebViews, saying which button was pressed. Then, based on that information, decide which of the UIWebViews to display.
As you are using storyboards, I suggest you look into prepareForSegue. It will allow you to set a property on the destination view controller with something like the following. You should add this to the UIViewController which contains the buttons.
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"buttonOne"]) {
ExampleViewController *destViewController = segue.destinationViewController;
destViewController.buttonClicked = #"One";
} else if ([segue.identifier isEqualToString:#"buttonTwo"]) {
ExampleViewController *destViewController = segue.destinationViewController;
destViewController.buttonClicked = #"Two";
}
}
You can then use the buttonClicked property in the destination view controller to decide which you should display. If you have two separate UIWebViews, you could choose to hide one using webViewOne.hidden = YES; and show the other using webViewTwo.hidden = NO;.
However, it would probably be neater to only have a single UIWebView. You could then use prepareForSeque to pass in the URL of the PDF you would like it to display, rather than just sending the name of the button clicked.
Assuming you webView is in a view controller called SecondViewController and your buttons are in the view controller called FirstViewController
1) Create an object in your SecondViewController.h
#interface SecondViewController : UIViewController
#property (nonatomic, strong) NSString *whichButtonClicked;
#end
2) Import SecondViewController in your FirstViewController
#import "SecondViewController.h"
3) In you button IBAction method in FirstViewController.m . use this code
- (IBAction) firstButtonClicked
{
SecondViewController *secondViewController = [self.storyboard instantiateViewControllerWithIdentifier:#"secondView"];
secondViewController. whichButtonClicked = #"first"
[self.navigationController pushViewController:secondViewController animated:YES];
}
- (IBAction) secondButtonClicked
{
SecondViewController *secondViewController = [self.storyboard instantiateViewControllerWithIdentifier:#"secondView"];
secondViewController. whichButtonClicked = #"second"
[self.navigationController pushViewController:secondViewController animated:YES];
}
PS Don't forget. In you Storyboard. Set Storyboard ID for SecondViewController as secondView
4) In your SecondViewController.m use this code to check which button
if ([self.whichButtonClicked isEqualToString:#"first"])
{
///display first web view here
}
else
{
//display second web view here
}
Hope this helps
I trying to pass the data from TableViewCell to the another ViewController.But No data Displaying in the another ViewController.here is my Code
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
PeripheralManager *objSelected=[device objectAtIndex:indexPath.row];
[self prepareForSegue:#"TableDetails" sender:objSelectedDevice];
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"TableDetails"])
{
DetailViewController *detail=segue.destinationViewController;
detail.dataArray=device;
}
}
Error Message
nested push animation can result in corrupted navigation bar
2012-10-24 12:01:39.805 [3182:707] nested push animation can result in corrupted navigation bar
2012-10-24 12:01:40.164 [3182:707] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.
2012-10-24 12:01:40.167 [3182:707] Finishing up a get navigation transition in an unexpected state. Navigation Bar subview tree might corrupted.
You do not need this:
[self.navigationController pushViewController:mdc animated:YES];
That is what Segue will do automatically
Also, you are having 3 lines that will load view controller - see below for comments:
NSInteger row=[indexPath row];
NSString *value=[device objectAtIndex:row];
MeBleDetailViewController *mdc=[self.storyboard instantiateViewControllerWithIdentifier:#"MeBleDetailViewController"];
mdc.deviceName=value;
[self presentModalViewController:mdc animated:YES]; // Load ViewController
[UIView commitAnimations];
[self performSegueWithIdentifier:#"TableDetails" sender:[device objectAtIndex:indexPath.row]]; // Load ViewController
[self.navigationController pushViewController:mdc animated:YES]; // Load ViewController
That is why you are getting that error: nested push animation can result in corrupted navigation bar
Also, If you have configured the segue from table cell to another view controller then you don't need anything in didSelectRowAtIndexPath method.
Edit:
Whatever data you want the pushed view controller to have - put it in prepareforSegue method instead of didSelectRowAtIndexPath
If you create a segue from table cell to view controller then you don't need to execute the following as this method is to execute the segue programmatically.
[self performSegueWithIdentifier:#"TableDetails" sender:[device objectAtIndex:indexPath.row]];
Remove your extra code Only do this-
In DetailViewController.h
#property(nonatomic, retain)NSMutableArray *dataArray;
In DetailViewController.m
#synthesize dataArray = _dataArray;
Now In TableViewController.m Just write this -
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if([segue.identifier isEqualToString:#"TableDetails"])
{
DetailViewController *detailViewObject = segue.destinationViewController;
detailViewObject.dataArray = anyArray;
}
}
Here I'm passing NSMutableArray.
OK. Let's say you have two viewcontrollers FirstViewController and SecondViewController.
In FirstViewController you have a tableview and of course tableviewcell. In SecondViewControlleryou need to display data.
So in SecondViewController.h you need to set a propery of some variable, in this case it is of id type #property (strong, nonatomic) id secDetailItem;. Synthesize it in SecondViewController.m and add a setter method like this
-(void)setDetdetailItem:(id)newSecdetailItem{
if (secDetailItem != newSecdetailItem) {
secDetailItem = newSecdetailItem;
// Update the view.
[self configureView];//This method is needed to update view if there are some changes in that view.
}
}
So then in FirstViewController.h import SecondViewController.h and add property #property (strong, nonatomic) SecondViewController *secondViewController; then
synthesize. In FirstViewController.m file in this delegate method do following:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
self.secondViewController.secDetailItem=//set your data should be passed.
//Also if you need to push viewcontroller add pushviewcontroller:SecondViewController, or use IB to connect tableview cell and SecondViewController together with push method.
}
In this case you will not need to use perform segue. The Setter method will work as soon as you set to the secDetailItem something.
Also if you need to update your view in SecondViewController add this method to it.
- (void)configureView
{
if (self.secDetailItem) {
self.textLabel.text=self.secDetailItem;//Data passed from FirstViewController
}
}
This is all you need to do. Sorry if it is complicated. Ask any question.
It might have something to do with this line:
[UIView commitAnimations];
You can delete it if you don't need it.
I'm developing an app which uses ABPeopleViewController, and i want to when the user finalized choosing a contact, go backward two viewcontroller before.
Here's how i am arriving to ABPeoplePickerNavigationController:
Tap in a button of a main view controller --> load modal (dialog) view controller --> tap in a button of the modal view controller --> load ABContacts.
I'm implementing the delegate of ABContacts in the modal view, which in turn has a delegate in the main view controller.
I want to go back from ABPeoplePicker delegate method to the main view controller.
Hope this understands and someone can help me, i didn't find anything like this.
My MainViewController.h:
#protocol ModalViewDialogDelegate
- (void)didReceiveMail:(NSString *)mail;
#end
#interface SetUpViewController : UIViewController<UITextFieldDelegate, ModalViewDialogDelegate>{
}
//...
My MainViewController.m:
//...
- (void)didReceiveMail:(NSString *)mail{
[self.presentedViewController dismissViewControllerAnimated:YES completion:nil];
//...
My ModalView.h:
#import <AddressBook/AddressBook.h>
#import <AddressBookUI/AddressBookUI.h>
#protocol ModalViewDialogDelegate;
#interface DialogViewController : UIViewController<ABNewPersonViewControllerDelegate, ABPeoplePickerNavigationControllerDelegate>{
id<ModalViewDialogDelegate> delegate;
}
#property (nonatomic, assign) id<ModalViewDialogDelegate> delegate;
#property (nonatomic, retain) NSString * mailSelected;
//...
My modalView.m:
- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person property:(ABPropertyID)property identifier:(ABMultiValueIdentifier)identifier{
//...here i get the email person property and then i want to go backwards to the main view controller, not the modal.
[self dismissViewControllerAnimated:YES completion:nil];
//don't know if it's ok like this, because in the implementation also dismiss presented viewcontroller.
[_delegate didReceiveMail:self.mailSelected];
return NO;
}
return YES;
}
Try putting this
[_delegate didReceiveMail:self.mailSelected];
inside the completion block of the
[self dismissViewControllerAnimated:YES completion:nil];
that precedes it.
(If that doesnt work you can simply call the dissmiss twice on your maincontroller delegate method, each dismiss will remove one from the stack)
[[[self presentingViewController] presentingViewController] dismissViewControllerAnimated:NO completion:nil];
I have the following simple view controller class set up
#protocol ThermoFluidsSelectorViewControllerDelegate;
#interface ThermoFluidsSelectorViewController : UIViewController <UITextFieldDelegate>
#property (weak, nonatomic) id <ThermoFluidsSelectorViewControllerDelegate> delegate;
// user hits done button
- (IBAction)done:(id)sender;
#end
#protocol ThermoFluidsSelectorViewControllerDelegate <NSObject>
-(void) didFinishSelection:(ThermoFluidsSelectorViewController *)controller fluidID: (NSString *)fluidID;
#end
the 'didFinishSeletion: fluidID:' method is defined in the master view controller and should dismiss the selector view controller when called. When the done button is pressed the following method is called:
- (IBAction)done:(id)sender
{
[[self delegate] didFinishSelection:self fluidID:nil];
}
the 'done:' method gets called (checked with an alert) but 'didFinishSelection...' is not getting called so the view will not revert back to the main screen. Any ideas?
It sounds like you have not assigned your delegate in your master view controller.
You should have something like this in your master view controller which sets up the delegate:
ThermoFluidsSelectorViewController *view = [[ThermoFluidsSelectorViewController alloc] init];
view.delegate = self;
here you can see I create the view, then set the delegate of the view back to myself.
If you are not creating the Thermo... view controller programatically, but have used a storyboard, then you can set the delegate in the prepareForSegue: method of your master view controller:
// Do some customisation of our new view when a table item has been selected
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Make sure we're referring to the correct segue
if ([[segue identifier] isEqualToString:#"MySegueID"]) {
// Get reference to the destination view controller
ThermoFluidsSelectorViewController *cont = [segue destinationViewController];
// set the delegate
cont.delegate = self;
Hope this helps.
I'm sure I'm overlooking the obvious as I've got countless working buttons...but...for whatever reason this one is not cooperating...
I've added a UIButton (Rounded Rect) to a UIView subclass (DialogView) which is a subview of my view controller's view. This subview is created almost entirely in IB. I've wired up the button to (IBAction)okButtonPressed:(id)sender in IB to Touch Up Inside and created a corresponding method in DialogView. However when I "touch" this button it doesn't trigger the method. userInteractionEnabled is true for the VC's view, DialogView and the UIButton.
Thinking maybe initWithCoder had to do some frame manipulation or something I added the following which successfully logs to console.
- (id)initWithCoder:(NSCoder *)decoder {
if (self = [super initWithCoder:decoder]) {
NSLog(#"DialogView initWithCoder called");
}
return self;
}
In further exploration I wired up an IBOutlet to the button and then if I try to change the titleLabel from the view controller I notice that it get's severely truncated. Default text of say "Press Me!" set in IB displays fine when view is first drawn. But if I change the text...
self.DialogView.okButton.titleLabel.text = #"Not Working";
...it gets truncated to "N..."
Dunno if this is related. Probably...
Anyone see what I've screwed up here?
Edit (adding code related to showing UIButton):
From the View Controller:
self.DialogView = [[[NSBundle mainBundle] loadNibNamed:#"DialogView" owner:self options:nil] objectAtIndex:0];;
self.DialogView.myVC = self;
self.DialogView.backgroundColor = [UIColor clearColor];
self.DialogView.center = CGPointMake(self.view.frame.size.width / 2, self.view.frame.size.height / 2);
self.DialogView.nameLabel.text = loan.fullName;
self.DialogView.noteLabel.text = loan.summaryOfLoan;
self.DialogView.amountLabel.text = [currencyFormatter stringFromNumber:loan.originalAmount];
self.DialogView.alpha = 0.0;
[self.view addSubview:DialogView];
The UILabels all displaying as expected. As is the problem UIButton. I can see it I just can't interact with it!?!
DialogView's interface:
#class MyViewController;
#interface DialogView : UIView {
IBOutlet UILabel *nameLabel, *noteLabel, *amountLabel;
IBOutlet UIImageView *arrowView;
IBOutlet UIButton *okButton;
MyViewController *myVC;
}
#property (nonatomic, retain) UILabel *nameLabel, *noteLabel, *amountLabel;
#property (nonatomic, retain) UIImageView *arrowView;
#property (nonatomic, assign) MyViewController *myVC;
#property (nonatomic, retain) UIButton *okButton;
- (IBAction)okButtonPressed:(id)sender;
#end
And DialogView's implementation:
#import "DialogView.h"
#import "MyViewController.h"
#implementation DialogView
#synthesize nameLabel, noteLabel, amountLabel, arrowView, okButton;
#synthesize myVC;
- (void)dealloc {
[nameLabel release];
[noteLabel release];
[amountLabel release];
[arrowView release];
[okButton release];
[super dealloc];
}
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
// Initialization code
}
return self;
}
- (id)initWithCoder:(NSCoder *)decoder {
if (self = [super initWithCoder:decoder]) {
NSLog(#"DialogView initWithCoder called");
}
return self;
}
- (IBAction)okButtonPressed:(id)sender {
NSLog(#"pressed DialogView OK button");
[self.myVC.navigationController popViewControllerAnimated:YES];
}
- (void)drawRect:(CGRect)rect {
// Drawing code
}
#end
I thought that we should use -setTitle:forState: in order to set button's title ?
An other thought, did you check that the button's frame is not CGRectZero ? And by the way, all the frames for the view in the hierarchy ? And check that one superview in the hierarchy is not user interaction disabled ?
And, I think imageView does not respond to touches, do you have one in your code ?
I was just having more or less the same problem and I found that my containing view did not have "User Interaction Enabled".
Hope this helps.
Do you maybe have two buttons on top of one another? Change the IB project window to the detail view and see if your view has more buttons than you are expecting. Maybe you've wired up a button that's not actually getting the press you're expecting.