I have 2 UIPickerViews as InputViews for textfields. I want to detect tap events on both of them. But only the taps on the first are detected.
Here is my code in ViewDidLoad:
// for Behandler selection
_behandlerArray = [self fetchBehandler];
_behandlerPickerView = [[UIPickerView alloc] init];
_behandlerTextField.inputView = _behandlerPickerView;
_behandlerPickerView.dataSource = self;
_behandlerPickerView.delegate = self;
[_behandlerPickerView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(behandlerPickerTapped:)]];
// for Medikamente selection
_medikamenteArray = [self fetchMedikamente];
_medikamentePickerView = [[UIPickerView alloc] init];
_medikamenteTextField.inputView = _medikamentePickerView;
_medikamentePickerView.dataSource = self;
_medikamentePickerView.delegate = self;
[_medikamentePickerView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(medikamentePickerTapped:)]];
And here are the methods:
-(void)behandlerPickerTapped:(UIGestureRecognizer *)gestureRecognizer{
NSLog(#"_behandlerPickerView tapped");
}
-(void)medikamentePickerTapped:(UIGestureRecognizer *)gestureRecognizer{
NSLog(#"_medikamentePickerView tapped");
}
But only the taps on _behandlerPickerView are detected/logged.
Can I only added one UITapGestureRecognizer?
And if so, how do I know in the method, which view was tapped?
Related
Hello Friends Please help me,
I have added UITapGesture on UIWindow but i can't able access parent control in screen
UIRotationGestureRecognizer *rot =[[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(handleRotation:)];
rot.cancelsTouchesInView = NO;
rot.delegate = self;
UIPinchGestureRecognizer *pinch =[[UIPinchGestureRecognizer alloc] initWithTarget:self
action:#selector(handlePinch:)];
pinch.cancelsTouchesInView = NO;
pinch.delegate = self;
/* UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self
action:#selector(handlePan:)];
pan.cancelsTouchesInView = NO;
pan.delegate = self;*/
//circle gesture
gr = [[MDCircleGestureRecognizer alloc] init];
[gr addTarget:self action:#selector(handleGesture:)];
//[self.view addGestureRecognizer:gr];
//gr.delegate = (id<MDCircleGestureFailureDelegate>)self.view;
gr.delegate = self;
gr.cancelsTouchesInView = NO;
////Z gesture
cg = [[CharGesture alloc] initWithTarget:self action:#selector(zLetterMade:)];
cg.delegate=self;
cg.cancelsTouchesInView = NO;
//Add on window - RR
[[[UIApplication sharedApplication]delegate]window].gestureRecognizers = #[gr,cg,pinch,rot];
please confirm that you have given UIGestureRecognizerDelegate and enable interaction [[[UIApplication sharedApplication]delegate]window].userInteractionEnabled=YES;
Once user double taps on image/screen, it adds an annotation on the screen. When it adds annotation image, I want also open a subview to add annotation detail. However, my subview does not come up.
Here is my code snippet.
#synthesize iViewController;
- (void)viewDidLoad {
[super viewDidLoad];
// adding gesture recognizer
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture:)];
tapGesture.numberOfTapsRequired = 2;
[self.imvPhoto addGestureRecognizer:tapGesture];
tapGesture.delegate = self;
}
- (void)handleTapGesture:(UITapGestureRecognizer *)sender {
if (sender.state == UIGestureRecognizerStateRecognized) {
// Here is the code for subview adding
iViewController = [[InventoryViewController alloc] init];
[self.view addSubview:iViewController.view];
iViewController.view.frame = CGRectMake(100, 100, 320, 460);
}
}
Based on #rdelmar feedback, here is the solution:
iViewController = (InventoryViewController *)[self.storyboardinstantiateViewControllerWithIdentifier:#"InventoryViewController"];
iViewController.view.frame = CGRectMake(728, 32, 300, 736);
[self.view addSubview:iViewController.view];
I am trying to add a tap gesture from a subclassed UIImageView and then control the tap from the View Controller. I am not getting any compiling errors but "addSubview" is not displaying any image. How can make the UIImageView to be displayed?
If I try to control the tap and pan gestures from the subclassed UIImageVIew I have no problems but I would like to control these functions from the View Controller
Relevant code looks like this.
UIImageView subclass
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self)
{
//self.userInteractionEnabled = YES;
previewController = [[PreviewController alloc]init];
[previewController self];
[self addSubview:character];
// Tap Initialization code
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:(PreviewController *)self.previewController action:#selector(addCharacter:)];
[self addGestureRecognizer:tap];
self.userInteractionEnabled = YES;
}
return self;
}
View Controller
- (void)addCharacter:(UITapGestureRecognizer *)t
{
NSLog(#"add character");
imageNSArray = [NSMutableArray array];
uiImg = [UIImage imageNamed:#"homer.png"];
CGPoint loc = [t locationInView:self.view];
character = [[UIImageView alloc] initWithImage:uiImg];
character.center = loc;
[imageNSArray addObject:character];
//Locate the imageNSArray on frameImageView area only.
[self.view addSubview:character];
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(panCharacter:)];
[self.character addGestureRecognizer:pan];
character.userInteractionEnabled = YES;
}
put a view behind your subclassed imageView. Apply the gestureRecognition to the new View.
You can control your tap gesture from new view. Let me know if i am not clear, or if more info needed.
I think what you want is.. .you want to show a image when user taps on screen.
Do following steps:
1. drag & drop a tap gesture recognizer on default view of your view controller.
2. connect (ctrl +) gestureRecognizer with ViewController.m
Take a look at this code. (Just modified your code)
- (IBAction)onTap:(UITapGestureRecognizer *)sender {
NSLog(#"add character");
UIImage * uiImg = [UIImage imageNamed:#"sel.png"];
CGPoint loc = [sender locationInView:self.view];
UIImageView * character = [[UIImageView alloc] initWithImage:uiImg];
character.center = loc;
[self.view addSubview:character];
}
Let me know if this is not what you want…
Edit
better go for this code… No need to do above steps.
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(onTap:)];
[self.view addGestureRecognizer:tap];
self.view.userInteractionEnabled = YES;
}
- (void)onTap:(UITapGestureRecognizer *)sender
{
NSLog(#"add character");
UIImage * uiImg = [UIImage imageNamed:#"sel.png"];
CGPoint loc = [sender locationInView:self.view];
UIImageView * character = [[UIImageView alloc] initWithImage:uiImg];
character.center = loc;
[self.view addSubview:character];
}
I'm using UITapGestureRecognizer
This is my code:
Home.m:
- (void)viewDidLoad {
[super viewDidLoad];
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(tapAnim:)];
[self.view addGestureRecognizer:tapGesture];
UIButton *buttontest = [[UIButton alloc] init];
buttontest.backgroundColor = [UIColor whiteColor];
buttontest.frame = CGRectMake(0, 80, 40, 40);
[buttontest addTarget:self action:#selector(test:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:buttontest];
[self.view bringSubviewToFront:buttontest];
}
- (void)test: (UIButton*)aButton {
// TakePhoto *mvc = [[TakePhoto alloc]initWithNibName:#"TakePhoto" bundle:Nil];
// [self.navigationController pushViewController:mvc animated:YES];
//
// [self.view removeFromSuperview];
if (self.companyController) {
self.companyController = nil;
}
self.companyController = [[TakePhoto alloc] initWithNibName:#"TakePhoto" bundle:nil];
UIView *viewSuper = [[IQAppDelegate shareInstance] currentVisibleController].view;
UIViewController *profile = self.companyController;
profile.view.frame = viewSuper.frame;
[viewSuper addSubview:profile.view];
profile.view.frame = CGRectMake(viewSuper.frame.origin.x, viewSuper.frame.size.height, profile.view.frame.size.width, profile.view.frame.size.height);
[UIView beginAnimations:nil context: nil];
[UIView setAnimationDuration:0.35];
profile.view.frame = CGRectMake(viewSuper.frame.origin.x, viewSuper.frame.origin.x, profile.view.frame.size.width, profile.view.frame.size.height);
[UIView commitAnimations];
}
}
- (void) tapAnim: (UITapGestureRecognizer*)gestureRecognizer {
// Show something
}
TakePhoto.m
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.delegate = self;
picker.allowsEditing = NO;
[(UIViewController *)self.delegate presentModalViewController:picker animated:YES];
I add a view:Takephoto front of Home(i'm not use "push"), like this:
--->Home
--->Take photo (like a popUp show): it has 2 buttons "Choose photo from library" and "Close"
When i use function "Choose photo from gallery", i cant choose a photo and UITapGestureRecognizer is always show.
How to disable UITapGestureRecognizer when choose photo from gallery?
P/S:sorry about my english.
Gesture recognizers have the enabled property. Set this to NO to disable the gesture recognizer. To make this easier you should keep a reference to the tap gesture recognizer using an instance variable.
you can set tapGesture.enabled=NO before you choose photos.
I think you need to implement this below delegate method :-
- (BOOL)gestureRecognizer:
(UIGestureRecognizer *)gestureRecognizer
shouldReceiveTouch:(UITouch *)touch
When you look on the documentation it will return YES (by default) to allow the gesture recognizer to examine the touch object, NO to prevent the gesture recognizer from seeing this touch object. For more details follow this https://developer.apple.com/library/ios/DOCUMENTATION/UIKit/Reference/UIGestureRecognizerDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIGestureRecognizerDelegate/gestureRecognizer:shouldReceiveTouch:
When I click on a image I want to show another popover, but it doesn't work!
My handle Tap method looks like :
-(void)handleTapView:(UITapGestureRecognizer*)recognizer
{
CGPoint startPoint = [recognizer locationInView:recognizer.view];
NSLog(#"handle Tap VIEW!!!!!!!!");
if ([recognizer.view isKindOfClass:[UIImageView class]] ) {
NSLog(#"Tap Image!!!!!!!!");
}
else if ([self.popover isPopoverVisible]) {
[self.popover dismissPopoverAnimated:YES];
}
else {
ShapesListViewController *shapes = (ShapesListViewController*) [self.storyboard instantiateViewControllerWithIdentifier:#"ShapesListViewController"];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:shapes];
UIPopoverController *pop = [[UIPopoverController alloc] initWithContentViewController:nav];
shapes.delegate = self;
self.popover = pop;
CGRect popoverRect;
popoverRect.origin = startPoint;
popoverRect.size.width = 1;
popoverRect.size.height =1;
[pop presentPopoverFromRect:popoverRect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
}
In viewdidload :
ImageView *imgv = [[ImageView alloc] initWithImage:[UIImage imagNamed:#"delete.png"]];
imgv.center = CGPointMake(250,250);
[self.view addSubview:imgv];
ImageView *imgv2 = [[ImageView alloc] initWithImage:[UIImage imageNamed:#"gear.png"]];
imgv2.center = CGPointMake(400,400);
[self.view addSubview:imgv2];
//Tap Recognizer
self.singelTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapView:)];
[self.singelTapGestureRecognizer setNumberOfTapsRequired:1];
[self.view addGestureRecognizer:self.singelTapGestureRecognizer];
You need to attach a separate gestureRecogniser to each view whose gestures you want to capture - in your case, both of your imageViews.
UITapGestureRecognizer *tapGR1, *tapGR2;
SEL selector = #selector(handleTapView:);
tapGR1 = [[UITapGestureRecognizer alloc] initWithTarget:self
action:selector];
tapGR2 = [[UITapGestureRecognizer alloc] initWithTarget:self
action:selector];
[imgv1 addGestureRecognizer:tapGR1];
[imgv2 addGestureRecognizer:tapGR2];
Don't attach a tapGR to their superview.
Then you also need to set userInteractionEnabled on each of the imageViews otherwise they will ignore touches (UIImageView defaults to userInteractionEnabled = NO):
imgv1.userInteractionEnabled = YES;
imgv2.userInteractionEnabled = YES;
In you handleTapView you need to reorganise slightly. Change the else if in you conditional sequence to if otherwise the third clause will never get triggered.
The recognizer.view for each of the recongnizers will correctly identify the imageView that was tapped. That will be the rect that the popover should present from in the coordinates of the imageView's superview - it's frame property.
So:
[pop presentPopoverFromRect:recognizer.view.frame
inView:self.view
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];