I've two UITapGestureRecognizer: singleTap and doubleTap initialized with two different actions.
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleSingleTap:)];
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleDoubleTap:)];
[singleTap requireGestureRecognizerToFail:doubleTap];
[doubleTap setNumberOfTapsRequired:2];
[imageView addGestureRecognizer:doubleTap];
[imageView addGestureRecognizer:singleTap];
When I run my app in simulator the single tap responds correctly but not the double tap ! When I double clicks nothings happens, I suppose iOS dose recognize the double tap because the action of single tap doesn't being called (due to [singleTap requireGestureRecognizerToFail:doubleTap];), but I can't understand why doesn't it do the action handleDoubleTap.
I think the problem is that UIImageView and UILabel both override the default value of YES for the userInteractionEnabled property, and sets it to NO.
Add imageView.userInteractionEnabled = YES; and try again.
The following code works for me:
- (void)handleTap:(UIGestureRecognizer*)gr {
NSLog(#"----------------- tap ----------------");
}
- (void)handleDoubleTap:(UIGestureRecognizer*)gr {
NSLog(#"================= double tap ============");
}
- (XXXView*)createXXXView {
XXXView *view = [[[XXXView alloc] init] autorelease];
view.xxx=...;//irrelevant
UITapGestureRecognizer *dtr = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleDoubleTap:)];
dtr.numberOfTapsRequired = 2;
UIGestureRecognizer *tr = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTap:)];
[tr requireGestureRecognizerToFail:dtr];
[view addGestureRecognizer:tr];
[view addGestureRecognizer:dtr];
return view;
}
Related
I have a UILabel and when i double tap on it ,it should assign value of Label to the other view's UITextView otherwise next view's textview should be empty.
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapped:)];
[tapRecognizer setNumberOfTapsRequired:1];
[tapRecognizer setDelegate:self];
[holderView addGestureRecognizer:tapRecognizer];
tapRecognizer = nil;
UITapGestureRecognizer *doubleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(LaunchText)];
[doubleTapRecognizer setNumberOfTapsRequired:2];
[doubleTapRecognizer setDelegate:self];
[holderView addGestureRecognizer:doubleTapRecognizer];
holderView.userInteractionEnabled=YES;
[tapRecognizer requireGestureRecognizerToFail:doubleTapRecognizer];
/*n=[SingleTon getInstance];
n.Name=textLabel.text;*/
if (doubleTapRecognizer.numberOfTapsRequired==2) {
n.Name=#"hi";
}
/* if (doubleTapRecognizer.numberOfTapsRequired==2) {
n.Name=textLabel.text;
}*/
else{
//n.Name=textLabel.text;
n.Name=#"hellow";
}
-(void) LaunchText
{
[self performSegueWithIdentifier:#"textAdd" sender:self];
}
I am always getting if condition, else part never runs, What is the issue with my code?
Please try below code.
//first add single tap
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(singleT:)];
[tapRecognizer setNumberOfTapsRequired:1];
[holderView addGestureRecognizer:tapRecognizer];
//now add double tap
UITapGestureRecognizer *doubleTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(doubleT:)];
[doubleTapRecognizer setNumberOfTapsRequired:2];
[holderView addGestureRecognizer:doubleTapRecognizer];
holderView.userInteractionEnabled=YES;
[tapRecognizer requireGestureRecognizerToFail:doubleTapRecognizer];
Now Implement Single Tap and Double Tap Method
-(void)singleT:(UITapGestureRecognizer *)gest
{
NSLog(#"Single");
}
-(void)doubleT:(UITapGestureRecognizer *)gest
{
NSLog(#"double");
}
Maybe this will help you.
doubleTapRecognizer.numberOfTapsRequired==2 is the value you set to how many times the user has to tap to set off the gesture recognizer. it you want to allow for single and double taps you can keep a count on the gesture recognizer target and see how many times they've tapped over a giving time, like 0.2 secs or whatever time you want. I'm not 100% sure but you could also try to add two gestures to the label one for numberOfTapsRequired = 1 and numberOfTapsRequired = 2 and have them both perform different functions. Again i'm not sure on the two recognizers but you could give it a try and try the other method otherwise.
i am trying to add gesture programmatically but messagesBucketTap method not print log
//
control=[self.storyboard instantiateViewControllerWithIdentifier:#"ControlScene"];
control.view.frame = CGRectMake(0, 0,control.view.frame.size.width,60);
[self.view addSubview:control.view];
//
UITapGestureRecognizer *messagesTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(messagesBucketTap:)];
[messagesTap setDelegate:self];
[messagesTap setNumberOfTapsRequired:1];
[messagesTap setNumberOfTouchesRequired:2];
[control.view addGestureRecognizer:messagesTap];
- (void)messagesBucketTap:(UITapGestureRecognizer *)gestureRecognizer{
NSLog(#"ramy'");}
As the title of this question said, I need to create a view where it needs to have action when one tap it or hold it. That means I have to add UITapGestureRecognizer and a UILongPressGestureRecognizer. I have already tried it. Somehow it redirect me to the screen where I needed to go, but it has affected it's back button. Affected by in the sense of it goes back to default text which is "Item" and it cannot perform it's assigned action.
Yes you can add these two gestures in one view. See the below code
UITapGestureRecognizer *singleTapRecognizer = [[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(didTap:)];
singleTapRecognizer.numberOfTapsRequired = 1;
singleTapRecognizer.delegate = self;
[self.view addGestureRecognizer:singleTapRecognizer];
UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:#selector(didLongPress:)];
[longPressRecognizer setDelegate:self];
longPressRecognizer.allowableMovement = 1.0f;
longPressRecognizer.minimumPressDuration = 2.0;
[self.view addGestureRecognizer:longPressRecognizer];
As i mentioned in my comment you can do so,here is some piece of code to help you out.
UITapGestureRecognizer * recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTap:)];
recognizer.delegate = self;
[view addGestureRecognizer:recognizer];
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]
initWithTarget:self
action:#selector(handleLongPress:)];
longPress.minimumPressDuration = 2.0;
[view addGestureRecognizer:longPress];
and here are are some links too for your better understanding:-
https://developer.apple.com/library/ios/documentation/uikit/reference/UILongPressGestureRecognizer_Class/Reference/Reference.html
https://developer.apple.com/library/ios/documentation/uikit/reference/UITapGestureRecognizer_Class/Reference/Reference.html
Hope this will help you out.
I add singTap and doubleTap to a view like the code below:
-(void)awakeFromNib{
[self setUserInteractionEnabled:YES];
//
UITapGestureRecognizer *doubleTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleDoubleTapGesture:)];
doubleTapGesture.numberOfTapsRequired = 2;
[self addGestureRecognizer:doubleTapGesture];
UITapGestureRecognizer *singleTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleSingleTapGesture:)];
singleTapGesture.numberOfTapsRequired = 1;
[self addGestureRecognizer:singleTapGesture];
}
-(void)handleSingleTapGesture:(UITapGestureRecognizer *)singleTapGesture{
[[self delegate] singleTapOnView];
}
-(void)handleDoubleTapGesture:(UITapGestureRecognizer *)doubleTapGesture{
[[self delegate] doubleTapOnView];
}
When doubleTap the singleTap also fire. How to disable singleTap when doubleTap? Thanks!
Tell the single-tap recognizer that it requires the double-tap recognizer to fail before it triggers:
[singleTapGesture requireGestureRecognizerToFail:doubleTapGesture];
(This is actually the canonical example in the UIGestureRecognizer docs for this method.)
I have a UITapGestureRecognizer added to my UITextView. I have set the numberOfTapsRequired to 1, but I really need this to be ANY. aField is a UITextView. I need any number of taps to call the selector. Any way to do this?
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(stateFieldSelected)];
singleTap.numberOfTapsRequired = 1;
[aField addGestureRecognizer:singleTap];
The purpose is, I am launching a UIPickerView when they tap the State field, but if they double or triple tap the state field, it will pull up the keyboard. I could add many gesture recognizers, but it seems lame to have to do that.
There isn't anything wrong with using multiple gesture recognizers on a view. But if you're worried about the single tap action being called twice in addition to the double tap action you could specify that the single tap recognizer requires the double tap recognizer to fail:
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(someOtherMethod)];
[doubleTap setNumberOfTapsRequired:2];
[aField addGestureRecognizer:doubleTap];
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(stateFieldSelected)];
[singleTap setNumberOfTapsRequired:1];
[singleTap requireGestureRecognizerToFail:doubleTap];
[aField addGestureRecognizer:singleTap];