i got a strange problem. I got a Superview with customcontrols as subviews.
Their are GestureRecognizer both in superview and subviews.
If i tap a subview its GestureRecognizer gets called and on tap on the superview its tap gets called.
but on long press in the subview SOMETIMES the GestureRecognizer of the superview gets called. I add the GestureRecognizers in the same functions but there is a different attitude.
Superview
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapPiece:)];
tapGesture.numberOfTapsRequired = 1;
//contenView is the area where my controls can be
[self.contentView addGestureRecognizer:tapGesture];
[tapGesture release];
UILongPressGestureRecognizer *longTapGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(longTapPiece:)];
tapGesture.numberOfTapsRequired = 1;
[self.contentView addGestureRecognizer:longTapGesture];
[longTapGesture release];
Subviews
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(selectPiece:)];
tapGesture.numberOfTapsRequired = 1;
[self addGestureRecognizer:tapGesture];
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(longPiece:)];
longPressGesture.numberOfTapsRequired = 1;
[self addGestureRecognizer:longPressGesture];
Can anyone tell me why the longtap doen't response to my subview and how to fix it.
THANK YOU
got a solution but this is not what i wanted i set the duration of the control lower than the one of the superview [longPressGesture setMinimumPressDuration:0.4]; But the gestureRecognizer should be independend
Related
I added UITapGestureRecognizer for UIImageView in both single tap and double tap. for single tap method A will call and for double tap method B will call.
its working perfectly for first time only.
First Time
If i made single tap on UIImageView, method A called as expected.
If i made double tap on UIImageView, method B called as expected.
Second Time
If i made single tap on UIImageView, method A called as expected.
If i made double tap on UIImageView, method B not called again method A only called.
I do not know where i am making problem.
UITapGestureRecognizer *gestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(hideHandle:)];
[gestureRecognizer setDelegate:self];
[userResizableView addGestureRecognizer:gestureRecognizer];
[gestureRecognizer release];
UITapGestureRecognizer *gestureRecognizer1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTap:)];
gestureRecognizer1.numberOfTapsRequired = 2;
[gestureRecognizer1 setDelegate:self];
[userResizableView addGestureRecognizer:gestureRecognizer1];
[gestureRecognizer1 release];
[gestureRecognizer requireGestureRecognizerToFail:gestureRecognizer1];
I have tested your code and it worked fine!
You are adding requireGestureRecognizerToFail after releasing gestureRecognizer1. This shouldn't be an issue as I tested after following comments and edited this answer but give it a go. Also give some meaningful names to variables and methods.
UITapGestureRecognizer *doubleTapGestureRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self action:#selector(handleDoubleTap:)];
doubleTapGestureRecognizer.numberOfTapsRequired = 2;
[userResizableView addGestureRecognizer:doubleTapGestureRecognizer];
UITapGestureRecognizer *singleTapGestureRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self action:#selector(handleSingleTap:)];
singleTapGestureRecognizer.numberOfTapsRequired = 1;
[singleTapGestureRecognizer requireGestureRecognizerToFail: doubleTapGestureRecognizer];
[userResizableView addGestureRecognizer:singleTapGestureRecognizer];
[doubleTapGestureRecognizer release];
[singleTapGestureRecognizer release];
I want to add to my UIViewController :
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture:)];
tapGesture.numberOfTapsRequired = 2;
[self.view addGestureRecognizer:tapGesture];
[tapGesture release];
UITapGestureRecognizer *tapGesture2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture2:)];
tapGesture2.numberOfTapsRequired = 1;
[self.view addGestureRecognizer:tapGesture2];
[tapGesture2 release];
the problem is if the user tap twice the two methods are called,and i want that if the user make double tap only the first(handleTapGesture) will be called and if he make one tap it will call only the second one(handleTapGesture2)
use this one..
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture)];
tapGesture.numberOfTapsRequired = 2;
[self.view addGestureRecognizer:tapGesture];
[tapGesture release];
UITapGestureRecognizer *tapGesture2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture2)];
tapGesture2.numberOfTapsRequired = 1;
[tapGesture2 requireGestureRecognizerToFail: tapGesture];
[self.view addGestureRecognizer:tapGesture2];
[tapGesture2 release];
you can use the code i posted on here
in this the method requireGestureRecognizerToFail: is used in viewcontroller.m this will solve your problem
For UITapGestureRecognizer, you can set number of taps required to control the recognition of the UITapGestureRecognizer. If you set numberOfTapsRequired to 2 and user taps only once, then the UITapGestureRecognizer won't be triggered.
My question is How about for UIPanGestureRecognizer? How to control its recognition?
I have a view. Once I set a UIPanGestureRecognizer to it, any dragging will trigger the action. But what I want is only the dragging in X-axis. And for non-X-axis dragging, all touch events should be sent to other views underneath.
How can I do it?
THanks
Set its delegate and implement
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer;
Then use
- (CGPoint)velocityInView:(UIView *)view;
on the gesture recogniser to calculate whether the gesture recognizer should handle it or not.
Check How to stop UIPanGestureRecognizer when object moved to certain frame. It may help you.
UIView *holderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, image.size.width, image.size.height)];
UIImageView *imageview = [[UIImageView alloc] initWithFrame:[holderView frame]];
[imageview setImage:image];
[holderView addSubview:imageview];
UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:#selector(scale:)];
[pinchRecognizer setDelegate:self];
[holderView addGestureRecognizer:pinchRecognizer];
UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(rotate:)];
[rotationRecognizer setDelegate:self];
[holderView addGestureRecognizer:rotationRecognizer];
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(move:)];
[panRecognizer setMinimumNumberOfTouches:1];
[panRecognizer setMaximumNumberOfTouches:1];
[panRecognizer setDelegate:self];
[holderView addGestureRecognizer:panRecognizer];
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapped:)];
[tapRecognizer setNumberOfTapsRequired:1];
[tapRecognizer setDelegate:self];
[holderView addGestureRecognizer:tapRecognizer];
[self.view addSubview:holderView];
Raees
Assume that your gestureRecognizer triggers the action _panRecogPanned below. You can see how the center of a subview ( the view that carries the gesture recognizer itself) moves following the transition. To disable panning on y axis, you simply set the center as the calculated new center, whereas the translation.y is omitted.
To move other subviews on the y axis, get their frame, update their origin.x property and reset the frame, they should follow your finger only on the y axis.
- (IBAction)_panRecogPanned:(id)sender{
CGPoint translation = [_panRecog translationInView:_statementFilterView];
//This subview only moves horizontally
_panRecog.view.center = CGPointMake(translation.x + _panRecog.view.center.x, _panRecog.view.center.y);
//This subview only moves vertically
CGRect newFrame = anotherSubview.frame;
newFrame.origin.y = anotherSubview.frame.origin.y + translation.y;
anotherSubview.frame = newFrame;
[_panRecog setTranslation:CGPointMake(0, 0) inView:self.view];
}
I am initializing my gesture recognizers with the following code when I initialize a view. However, after multiple times of presenting a view on top of the one with the gesture recognizers and dismissing it with presentModalViewController and dismissModelViewController, the gesture recognizers stop working on the original view. I've tried manually releasing the recognizers in the view's dealloc function rather than using autorelease, but it doesn't seem to help. Does anyone have any ideas? Thanks!
Also, I should mention that this problem only happens on the device, and not the simulator.
-(void) initializeGestures {
recognizer = [[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture:)] autorelease];
//recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(handleTapGesture:)];
[(UITapGestureRecognizer *)recognizer setNumberOfTouchesRequired:1];
[self.view addGestureRecognizer:recognizer];
recognizer.delegate = self;
swipeLeftGesture = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(handleSwipeGestureLeft:)] autorelease];
//swipeLeftGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(handleSwipeGestureLeft:)];
swipeLeftGesture.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:swipeLeftGesture];
swipeLeftGesture.delegate = self;
swipeRightGesture = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(handleSwipeGestureRight:)] autorelease];
//swipeRightGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:#selector(handleSwipeGestureRight:)];
swipeRightGesture.direction = UISwipeGestureRecognizerDirectionRight; // default
[self.view addGestureRecognizer:swipeRightGesture];
swipeRightGesture.delegate = self;
}
-(IBAction) handleSwipeGestureLeft:(UISwipeGestureRecognizer*)sender
{
[self swipeLeft];
}
-(IBAction) handleSwipeGestureRight:(UISwipeGestureRecognizer*)sender
{
[self swipeRight];
}
-(IBAction) handleTapGesture:(UITapGestureRecognizer *) sender {
[self gotoDefinition];
}
did the view with gesture recognizers dealloc when you present another viewController?
this will cause the view remove gesture recognizers on it
I have a UIScrollView with multiple UIImageViews in it created like this.
frame = [[UIImageView alloc] initWithImage:bg];
frame.frame = CGRectMake(FRAME_SEPARATOR + numPage*1024 + numColumn*(FRAME_SEPARATOR+230), 10 +numRow*(FRAME_SEPARATOR+145), 230, 145);
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(imageTapped:)];
[frame addGestureRecognizer:tap];
[tap release];
[scroll addSubView:frame];
The problem is that imageTapped is not being called when tapping over an image.
If I add the gesture recognizer to the scrollview like this:
UITapGestureRecognizer *tap =
[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(imageTapped:)];
[scroll addGestureRecognizer:tap];
[tap release];
imageTapped is called.
How can I detect the taps over the UIImageViews?
Thanks
Make sure userInteractionEnabled is set to YES on the UIImageView:
frame.userInteractionEnabled = YES;
I'd also recommend using a different name for the UIImageView variable (eg. imageView instead of frame). Otherwise, you can easily confuse it with the view's frame property.