I'm trying to add a UILongPressGestureRecognizer and a UITapGestureRecognizer to an IBOutletCollection of UIImageViews, but it's not working. Here's the code I'm using:
UILongPressGestureRecognizer *pressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(deleteImage:)];
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(selectImage:)];
pressRecognizer.delegate = self;
tapRecognizer.delegate = self;
for (UIImageView *imageView in myImageViewCollection)
{
[imageView addGestureRecognizer:pressRecognizer];
[imageView addGestureRecognizer:tapRecognizer];
imageView.userInteractionEnabled = YES;
}
- (void)selectImage:(UITapGestureRecognizer *)sender
{
NSLog(#"Select");
}
- (void)deleteImage:(UILongPressGestureRecognizer *)sender
{
NSLog(#"Delete");
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
I've conformed to the UIGestureRecognizerDelegate. What am I doing wrong?
Refer to this question. Sounds like the same issue. I recreated your problem and the gesture recognizers are only bound to the last view.
Related
I'm trying to implement a zoom feature for an iCarousel item view. This is my code :
NSString *pathToHDImage = [documentsFolderPath stringByAppendingPathComponent:solution.localHDURL];
if (!view) {
view = [[AsyncImageView alloc] initWithFrame:self.view.bounds];
view.contentMode = UIViewContentModeScaleAspectFit;
UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:#selector(handlePinch:)];
pinchGesture.cancelsTouchesInView = false;
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(handlePan:)];
panGesture.cancelsTouchesInView = false;
pinchGesture.delegate = panGesture.delegate = self;
[view addGestureRecognizer:pinchGesture];
[view addGestureRecognizer:panGesture];
((AsyncImageView *)view).imageURL = [NSURL fileURLWithPath:pathToHDImage];
} else
((AsyncImageView *)view).imageURL = [NSURL fileURLWithPath:pathToHDImage];
The problem is that my handlePan: and handlePinch: never get called. How can I do? The main goal is to implement zoom feature for every iCarousel item view.
Try this Code:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
I did not test but I hope it helps.
In case it does not work check out this link1 and then this link2
I have drawingView and listen UIPanGestureRecognizer, UIRotationGestureRecognizer, and UIPinchGestureRecognizer on it.
- (void)viewDidLoad
{
[super viewDidLoad];
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(panDetected:)];
[self.drawingView addGestureRecognizer:panRecognizer];
UIRotationGestureRecognizer *rotateRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(rotateRecognizer:)];
[self.drawingView addGestureRecognizer:rotateRecognizer];
UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:#selector(pinchRecognizer:)];
[self.drawingView addGestureRecognizer:pinchRecognizer];
[self.drawingView reloadData];
}
-(void) pinchRecognizer:(UIPinchGestureRecognizer*) recognizer {
return;
NSLog(#"Call scale");
}
- (void)rotateRecognizer:(UIRotationGestureRecognizer*)recognizer {
NSLog(#"Call rotaion");
}
If i only choose UIRotationGestureRecognizer or UIPinchGestureRecognizer it is perfect. But if using UIRotationGestureRecognizer and UIPinchGestureRecognizer only UIPinchGestureRecognizer called, UIRotationGestureRecognizer isn't called.
What is problem in my code?
I think i will make a UISegmented to choose mode , UIRotationGestureRecognizer or UIPinchGestureRecognizer, what should i do?
Thank a lot
If you want to have multiple gestures recognized at once, try using gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer, ex:
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
Edit: In addition to including the delegate in your .h, make sure to set your UIGestureRecognizer's delegate's to self, ex:
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(panDetected:)];
panRecognizer.delegate = self;
[self.drawingView addGestureRecognizer:panRecognizer];
UIRotationGestureRecognizer *rotateRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(rotateRecognizer:)];
rotateRecognizer.delegate = self;
[self.drawingView addGestureRecognizer:rotateRecognizer];
Use requireGestureRecognizerToFail: to recognize the gesture if the other gesture recognizer did not executes.
[rotateRecognizer requireGestureRecognizerToFail: pinchRecognizer];
Hello everyone I have a uitapgesture on my view using the following code :
UITapGestureRecognizer *tap= [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(TAPGestureRecognizer)];
tap.numberOfTapsRequired=1;
tap.delegate = self;
[self.view addGestureRecognizer:tap];
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
And I have a uiwebview as a subview in my UIview. The problem is that on the uivewview HTML it had a onclick(); which in turn is calling the tapgesture. Any help?
FirstView.image=[UIImage imageNamed:#"shape1.jpg"];
FirstView.tag=1;
FirstView.userInteractionEnabled=YES;
[FirstView addGestureRecognizer:[[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(firstimagetouch:)]];
SecondWebView.tag=2;
SecondWebView.userInteractionEnabled=YES;
[SecondWebView addGestureRecognizer:[[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(firstimagetouch:)]];
-(void)firstimagetouch:(UIGestureRecognizer *)sender
{
UIView * view=sender.view;
NSLog(#"%ld",(long)view.tag);
}
try like this first add gesture recognizer to view and then your webview according to give him tag value and get tag value. and do what you want.
I adding subviews programmatic. for each subview I'm adding a gesture reconognizer:
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake((position*1024)+200,0,image.size.width,image.size.height);
UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc]
initWithTarget:self action:#selector(singleFingerTap:)];
singleFingerTap.numberOfTapsRequired = 1;
[imageView addGestureRecognizer:singleFingerTap];
[singleFingerTap release];
but the tap is not responding how can I verify the gesture has been add it to the subview ?
Add this after your code:
NSLog(#"imageView.gestureRecognizers: %#", [imageView.gestureRecognizers description]);
If you have properly added gestureRecognizers it will print the description of each to the console. If not, it will show (NULL) or an empty array in the console.
You can also set the gesture recognizer delegate:
[singleFingerTap setDelegate:self];
Then add the delegate method and set a break point to make sure it is getting called:
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
NSLog(#"gestureRecognizerShouldBegin: called");
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
NSLog(#"shouldReceiveTouch: called");
return YES;
}
I am trying to add 2 gestures to a uiimage that pulls a subVIew. One gesture is swipe to open/close. And the other is longpressand hold to open it at a specific height.
longPress.minimumPressDuration = 1;
[imageNavigationSlider addGestureRecognizer:longPress];
UILongPressGestureRecognizer *longPressWall = [[[UILongPressGestureRecognizer alloc]
initWithTarget:self action:#selector(handleLongPressWall:)] autorelease];
longPressWall.minimumPressDuration = 1;
PullMeImage.userInteractionEnabled=YES;
[PullMeImage addGestureRecognizer:longPressWall];
UISwipeGestureRecognizer *swipe = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(swipe:)] autorelease];
swipe.direction = UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight;
[PullMeImage addGestureRecognizer:swipe];
[swipe setDelegate:self];
The long press gesture is correctly recognized, but the swipe isn't.
I also tried using:
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
But with no success. Any help will be very much appreciated.
Thank you