MainViewController contains UISegmentedControl with 3 segments.
SliderSubViewController contains a UISlider and -(void) sliderValueChanged:(UISlider*)sender
I want to add a code like this in SliderSubViewController.m but I'm stuck on how to access the UISegmentedControl and add an image:
- (void)viewDidLoad
{
[super viewDidLoad];
mainController = [[MainViewController alloc] initWithNibName:nil bundle:nil];
[minPrisSlider addTarget:self
action:#selector(sliderValueChanged:)
forControlEvents:UIControlEventValueChanged];
- (void)sliderValueChanged:(UISlider*)sender
{
NSUInteger index = (NSUInteger)(minPrisSlider.value + 0.5); // Round the number.
[minPrisSlider setValue:index animated:NO];
int progressAsInt =(int)(minPrisSlider.value + 0.5f);
NSString *newText =[[NSString alloc] initWithFormat:#"%d,-",progressAsInt];
minPrisText.text = newText;
if (minPrisSlider.value != 70) {
/*mainController.segmentedControl add main bundle image named "CheckboxChecked.png"
to current segment*/
}
}
If you have added SliderViewController as subview on MainViewController, One approach you can try is to just declare object of MainViewController in SliderViewController write #property and #synthesize, dont allocate it and while adding SliderView as subview just assign it as
sliderviewcontrollerObject.mainViewControllerObject = self;
now you can access segmentedControl from sliderview ass self.mainViewControllerObject.segmentedbar
Also you can try delegate approach.
Related
I'm having some problems setting a custom NSView for my NSPopupButton menu items. Here is what I've got so far:
#interface ViewController ()
#property (weak) IBOutlet NSPopUpButton *popupButton;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
for(int i = 0; i < 25; i++) {
NSMenuItem *menuItem = [[NSMenuItem alloc ] initWithTitle:[NSString stringWithFormat:#"%d", i] action:#selector(itemClicked:) keyEquivalent:#""];
MenuView *menuView = [[MenuView alloc] initWithFrame:CGRectMake(0, 0, 184, 50)];
menuView.displayText.stringValue = #"This is a test";
[menuItem setView:menuView];
[self.popupButton.menu addItem:menuItem];
}
}
- (void)itemClicked:(id)sender {
}
#end
//My custom view
#implementation MenuView
- (id)initWithFrame:(NSRect)frameRect {
NSString* nibName = NSStringFromClass([self class]);
self = [super initWithFrame:frameRect];
if (self) {
if ([[NSBundle mainBundle] loadNibNamed:nibName
owner:self
topLevelObjects:nil]) {
[self configureView];
}
}
return self;
}
- (void)awakeFromNib {
[super awakeFromNib];
[self configureView];
}
- (void)configureView {
[self setWantsLayer:YES];
self.layer.backgroundColor = [NSColor blueColor].CGColor;
}
#end
//Here is what my xib MenuView looks like
And here is the problem:
This seems like it should be a fairly straight forward task but I'm not sure what is happening to my view and why my label on the view seems to disappear and is not showing any text for each of the views. I was poking around in the documentation and stumbled across this for the NSPopupButton Menu :
// Overrides behavior of NSView. This is the menu for the popup, not a context menu. PopUpButtons do not have context menus.
#property (nullable, strong) NSMenu *menu;
I'm not sure if there is something that I'm doing wrong that is causing this problem or if what I'm trying to do in this context is not achievable off of an NSPopupButton NSMenu. If anyone has any experience with this and could offer advice I'd really appreciate it.
I have a view which includes two subviews. I had it working so that only one subview was shown at a time and each subview had a button and when the button was clicked the subview would flip over and the next subview would appear. The problem was that it appeared as though the entire view was flipping. After reading on this site about how to solve the problem I attempted to add the subviews to a container and flip that instead. However now, although my first subview is showing up when I press the button it no longer flip. It doesn't do anything. I put a log statement in the method which flips the subviews, as well as a breakpoint and as far as I can tell it no longer gets called. I'm very new to xcode and objective c and delegates and I have no idea how to proceed. Any help would be appreciated. Thanks.
I have included the relevant code here:
The header for the ViewController
#interface ExerciseViewController : UIViewController<ExerciseSubViewDelegate>
//stuff for subviews
#property (nonatomic, strong) ExerciseSubViewImage *subViewImage;
#property (nonatomic, strong) ExerciseSubViewText *subViewText;
#property UIView *panel;
#end
This is the code for the ViewController:
#interface ExerciseViewController ()
#end
#implementation ExerciseViewController
#synthesize subViewImage, subViewText;
- (void)viewDidLoad
{
self.subViewImage.delegate = self;
_panel = [[UIView alloc] initWithFrame:CGRectMake(0,0, self.view.bounds.size.width, self.view.bounds.size.height/2)];
_panel.backgroundColor = [UIColor whiteColor];
[self.view addSubview:_panel];
[_panel addSubview:subViewImage];
}
-(ExerciseSubViewImage *)subViewImage
{
if (!subViewImage)
{
CGRect subViewImageFrame = CGRectMake(0,0, _panel.bounds.size.width, _panel.bounds.size.height);
self.subViewImage = [[ExerciseSubViewImage alloc] initWithFrame:subViewImageFrame];
[_panel addSubview:subViewImage];
}
return subViewImage;
}
-(ExerciseSubViewText *)subViewText
{
if (!subViewText)
{
CGRect subViewTextFrame = CGRectMake(0,0, _panel.bounds.size.width, _panel.bounds.size.height);
self.subViewText = [[ExerciseSubViewText alloc] initWithFrame:subViewTextFrame];
self.subViewText.backgroundColor = [UIColor blueColor];
[_panel addSubview:subViewText];
}
return subViewText;
}
-(void)exerciseSubViewImagePressed
{
[UIView transitionWithView:_panel
duration:0.2
options:UIViewAnimationOptionTransitionFlipFromRight
animations:^{
[subViewImage removeFromSuperview];
[_panel addSubview:subViewText];
}
completion: nil];
//This is how I did it before I added the container
/*[UIView transitionFromView:subViewImage
toView:subViewText
duration:0.2
options:UIViewAnimationOptionTransitionFlipFromRight
completion:nil];
self.subViewText.delegate = self;*/
NSLog(#"Ipushedtheimage");
}
-(void)exerciseSubViewTextPressed
{//I haven't updated this yet
[UIView transitionFromView:subViewText
toView:subViewImage
duration:0.2
options:UIViewAnimationOptionTransitionFlipFromRight
completion:nil];
self.subViewImage.delegate = self;
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
subViewImage = nil;
subViewText = nil;
}
#end
This is the code for the delegate
#import
#protocol ExerciseSubViewDelegate <NSObject>
-(void) exerciseSubViewImagePressed;
-(void) exerciseSubViewTextPressed;
#end
I am also added the code for the first subview:
#import
#import "ExerciseSubViewDelegate.h"
#interface ExerciseSubViewImage : UIView
#property (nonatomic, strong) UIButton *button;
#property (nonatomic, assign) id<ExerciseSubViewDelegate>delegate;
#property (strong, nonatomic) UIImageView *exerciseImageView;
#end
#import "ExerciseSubViewImage.h"
#import "UIImage+animatedGIF.h"
#implementation ExerciseSubViewImage
#synthesize button;
#synthesize delegate;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
//Initialization code
self.button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
CGRect buttonFrame = CGRectMake(50,200,100,35);
self.button.frame = buttonFrame;
[self.button setTitle:#"Image"forState:UIControlStateNormal];
[self.button addTarget:self
action:#selector(buttonTouched)
forControlEvents:UIControlEventTouchUpInside];
[self addSubview:self.button];
_exerciseImageView = [[UIImageView alloc] initWithFrame:CGRectMake(50,20,160,158)];
NSURL *url = [[NSBundle mainBundle] URLForResource:#"AppleLogo" withExtension:#"gif"];
_exerciseImageView.image = [UIImage animatedImageWithAnimatedGIFURL:url];
[self addSubview:self.exerciseImageView];
}
return self;
}
-(void)buttonTouched
{
NSLog(#"imagebuttonpressed");
[self.delegate exerciseSubViewImagePressed];
}
Again, any help would be appreciate. I know I'm probably just not understanding something simple.
Ok. This took me all weekend but I finally figured it out on my own. I thought I would shere the answer here in case anyone else ever has a similar problem. After trying several other approaches I finally went back to the approach I used here and started inserting a whole bunch of NSLogs to determine the order that every thing was executing in. What I finally ended up doing was changing this: (all in the top ViewController)
self.subViewImage.delegate = self;
_panel = [[UIView alloc] initWithFrame:CGRectMake(0,0, self.view.bounds.size.width, self.view.bounds.size.height/2)];
_panel.backgroundColor = [UIColor whiteColor];
[self.view addSubview:_panel];
[_panel addSubview:subViewImage];
to this:
//create panel
_panel = [[UIView alloc] initWithFrame:CGRectMake(0,0, self.view.bounds.size.width, s self.view.bounds.size.height/2)];
_panel.backgroundColor = [UIColor whiteColor];
[self.view addSubview:_panel];
[_panel addSubview:subViewImage];
//Set the subview delegates
self.subViewImage.delegate = self;
self.subViewText.delegate = self;
So, i have a UITableView split in 3 sections. I want to be able, once i opened up the second row in the first section (i.e.), to swipe left to go to the next cell, and to swipe right to go the previous cell.
I wrote the code for the swipe:
SecondDetailView.m
- (void)viewDidLoad
{
UISwipeGestureRecognizer *swipeRecognizerLeft = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:#selector(swipeDetectedLeft:)];
swipeRecognizerLeft.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:swipeRecognizerLeft];
[swipeRecognizerLeft release];
UISwipeGestureRecognizer *swipeRecognizerRight = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:#selector(swipeDetectedRight:)];
swipeRecognizerRight.direction = UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:swipeRecognizerRight];
[swipeRecognizerRight release];
}
- (void)swipeDetectedRight:(UIGestureRecognizer *)sender {
NSLog(#"Right Swipe");
}
- (void)swipeDetectedLeft:(UIGestureRecognizer *)sender {
NSLog(#"Left Swipe");
}
How can i do that? Is it right to put the code into the Detail View?
I have a very simple solution for your issue.
You need to declare an NSMutableArray *arr; in your .h file and assign your array to this array when you are moving to detail page.
And also you need to declare an NSString *currentPos; variable.
- (void)swipeDetectedRight:(UIGestureRecognizer *)sender {
currentPos--;
NSMutableDictionary *dic=[arr objectAtIndex:currentPos];
}
- (void)swipeDetectedLeft:(UIGestureRecognizer *)sender {
currentPos++;
NSMutableDictionary *dic=[arr objectAtIndex:currentPos];
}
In this way you can get your next and prev index values of array.
Hope this help for you.
Shivam
In my example I use NSString as my data that will be displayed in detail view controller. Feel free to change that to whatever suits your needs. Okay so here we go:
First declare a protocol in DetailViewController like so:
#class DetailViewController;
#protocol DetailViewControllerDelegate <NSObject>
- (void)swipeToNextCell:(DetailViewController *)sender;
- (void)swipeToPreviousCell:(DetailViewController *)sender;
#end
#interface DetailViewController : UIViewController
#property(weak, nonatomic) id<DetailViewControllerDelegate> delegate;
#property(copy, nonatomic) NSString *data;
#property(weak, nonatomic) IBOutlet UILabel *label;
#end
The next thing is to add UISwipeGestureRecognizers in DetailViewController to check for gestures:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UISwipeGestureRecognizer *leftGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(swipeDetectedLeft:)];
leftGesture.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:leftGesture];
UISwipeGestureRecognizer *rightGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(swipeDetectedRight:)];
rightGesture.direction = UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:rightGesture];
}
Implement viewWillAppear to display your data when you push your DetailViewController:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.label.text = self.data;
}
Don't forget to implement methods that will be called by GestureRecognizers:
- (void)swipeDetectedRight:(UISwipeGestureRecognizer *)sender
{
NSLog(#"Right Swipe");
[self.delegate swipeToNextCell:self];
self.label.text = self.data;
}
- (void)swipeDetectedLeft:(UISwipeGestureRecognizer *)sender
{
NSLog(#"Left Swipe");
[self.delegate swipeToPreviousCell:self];
self.label.text = self.data;
}
And thats all you need in your Detail View. Now go to the TableViewController. Your TableViewController should implement the DetailViewControllerDelegate protocol:
#interface CustomTableViewController : UITableViewController <DetailViewControllerDelegate>
#property(strong, nonatomic) DetailViewController *detailViewController;
#property(assign, nonatomic) NSInteger currentRow;
#end
Here is my getter for detailViewController #property:
- (DetailViewController *)detailViewController
{
if (_detailViewController == nil)
{
_detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
_detailViewController.delegate = self;
}
return _detailViewController;
}
Here is how I manage row selection:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
DetailViewController *viewController = self.detailViewController;
viewController.data = [NSString stringWithFormat:#"Cell: %d", indexPath.row];
viewController.title = #"Detail";
self.currentRow = indexPath.row;
[self.navigationController pushViewController:viewController animated:YES];
}
The last thing you have to do is to implement protocol's methods:
- (void)swipeToNextCell:(DetailViewController *)sender
{
// Get data for next row
sender.data = [NSString stringWithFormat:#"Cell: %d", ++self.currentRow];
}
- (void)swipeToPreviousCell:(DetailViewController *)sender
{
// Get data for next row
sender.data = [NSString stringWithFormat:#"Cell: %d", --self.currentRow];
}
I tested it on simulator and worked fine. It is very simple as my data model is quite simple - it is just NSString. There is no checking whether there is any row in section so you have to figure that out yourself. But the whole delegation pattern should be the same.
Good luck!
Declare a protocol in the detail view controller and set the parent (which should be the table view controller) as the delegate. Then, in the swipe methods call the delegate and implement the necessary code for changing the selected row.
I have this code:
- (IBAction) checkIt:(id)sender{
NSString *button = [[(UIImageView *)sender label]text];
I want to get the label of the UIImageView. What am I doing wrong? This works with buttons...Not sure I understand how to access attributes correctly.
Subclass UIImageView. Add a string member and property for accessing it. Instead of creating an object of UIImageView, create the object of your class.
In .h
#interface CustomImageView : UIImageView
{
NSString *imageName;
}
#property (nonatomic, retain) NSString *imageName;
#end
in .m
#implementation CustomImageView
#synthesize imageName;
-(void) dealloc
{
[imageName release];
[super dealloc];
}
#end
in the file where you want to use this class
-(void) addCustomImageView
{
CustomImageView *imgView = [[CustomImageView alloc]initWithImage:[UIImage imageNamed:#"abc.png"]];
imgView.frame = CGRectMake(0, 0, 100, 100);
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(imgViewtapped:)];
[imgView addGestureRecognizer:tap];
[tap release];
[self.view addSubview:imgView];
[imgView release];
}
-(NSString *) imgViewtapped:(CustomImageView *)sender
{
return [sender imageName];
}
UIImageViews do not have labels.
https://developer.apple.com/library/ios/#documentation/uikit/reference/UIImageView_Class/Reference/Reference.html
I try to build a endless scrolling UIScrollView. So far I took the apple sample "StreetScroller". So all I do is setting the contentOffset back when it reaches the end of the scroll view.
Override -layoutSubviews of the UIScrollView:
- (void)layoutSubviews
{
CGFloat contentWidth = [self contentSize].width;
CGPoint contentOffset = [self contentOffset];
CGFloat centerOffsetX = (contentWidth - [self bounds].size.width) / 2.0;
CGFloat distanceFromCenter = contentOffset.x - centerOffsetX;
if (ABS(distanceFromCenter) > (contentWidth / 4.0)) {
contentOffset = CGPointMake(centerOffsetX, contentOffset.y);
[super setContentOffset:contentOffset];
}
}
Now on iOS 5 this works like a charm. But on iOS 4.3 it's not working. As soon as I call [super setContentOffset:contentOffset] it stoops scrolling because next time -layoutSubviews get's called the [self contentOffset] does not return the contentOffset that was set.
I know there are a lot a questions about infinite UIScrollViews, but one of these has fixed this problem!
Try this One. This Code is Working Properly for me on iOS 4.3
RootViewController.h
#class ViewControllerForDuplicateEndCaps;
#interface RootViewController : UIViewController {
ViewControllerForDuplicateEndCaps *viewControllerForDuplicateEndCaps;
}
#property (nonatomic, retain) ViewControllerForDuplicateEndCaps *viewControllerForDuplicateEndCaps;
- (IBAction)loadScrollViewWithDuplicateEndCaps:(id)sender;
#end
RootViewController.m
#import "RootViewController.h"
#import "ViewControllerForDuplicateEndCaps.h"
#import "InfiniteScrollViewAppDelegate.h"
#implementation RootViewController
#synthesize viewControllerForDuplicateEndCaps;
- (IBAction)loadScrollViewWithDuplicateEndCaps:(id)sender {
InfiniteScrollViewAppDelegate *delegate = (InfiniteScrollViewAppDelegate*)[[UIApplication sharedApplication] delegate];
if(self.viewControllerForDuplicateEndCaps == nil) {
ViewControllerForDuplicateEndCaps *temp = [[ViewControllerForDuplicateEndCaps alloc] initWithNibName:#"ViewControllerForDuplicateEndCaps" bundle:nil];
self.viewControllerForDuplicateEndCaps = temp;
[temp release];
}
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStyleBordered target:nil action:nil];
self.navigationItem.backBarButtonItem = backButton;
[backButton release];
[delegate.navigationController pushViewController:self.viewControllerForDuplicateEndCaps animated:YES];
}
- (void)dealloc {
[scrollView release];
[super dealloc];
}
#end
ViewControllerForDuplicateEndCaps.h
#import <UIKit/UIKit.h>
#interface ViewControllerForDuplicateEndCaps : UIViewController <UIScrollViewDelegate> {
IBOutlet UIScrollView *scrollView;
}
#property (nonatomic, retain) UIScrollView *scrollView;
- (void)addImageWithName:(NSString*)imageString atPosition:(int)position;
#end
ViewControllerForDuplicateEndCaps.m
#import "ViewControllerForDuplicateEndCaps.h"
#implementation ViewControllerForDuplicateEndCaps
#synthesize scrollView;
- (void)viewDidLoad {
[super viewDidLoad];
// add the last image (image4) into the first position
[self addImageWithName:#"image4.jpg" atPosition:0];
// add all of the images to the scroll view
for (int i = 1; i < 5; i++) {
[self addImageWithName:[NSString stringWithFormat:#"image%i.jpg",i] atPosition:i];
}
// add the first image (image1) into the last position
[self addImageWithName:#"image1.jpg" atPosition:5];
scrollView.contentSize = CGSizeMake(1920, 416);
[scrollView scrollRectToVisible:CGRectMake(320,0,320,416) animated:NO];
}
- (void)addImageWithName:(NSString*)imageString atPosition:(int)position {
// add image to scroll view
UIImage *image = [UIImage imageNamed:imageString];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake(position*320, 0, 320, 416);
[scrollView addSubview:imageView];
[imageView release];
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)sender {
NSLog(#"%f",scrollView.contentOffset.x);
// The key is repositioning without animation
if (scrollView.contentOffset.x == 0) {
// user is scrolling to the left from image 1 to image 4
// reposition offset to show image 4 that is on the right in the scroll view
[scrollView scrollRectToVisible:CGRectMake(1280,0,320,416) animated:NO];
}
else if (scrollView.contentOffset.x == 1600) {
// user is scrolling to the right from image 4 to image 1
// reposition offset to show image 1 that is on the left in the scroll view
[scrollView scrollRectToVisible:CGRectMake(320,0,320,416) animated:NO];
}
}
- (void)dealloc {
[scrollView release];
[super dealloc];
}
#end