I'm using UITapGestureRecognizer
because I'm using a UIScrollView
that acts as a container for my UILabel
s. Basically I'm trying to use an action method with arguments so I can e.g. send myLabel.tag
value to the action method to know what action to take depending on what UILabel has has been triggered by a tap.
One way of doing it is having as many action methods as UILabel
s but that isn't very "pretty" codewise. What I would like to achieve is just having one action method with switch statements.
Is this possible or will I have to do it like this (sigh):
UITapGestureRecognizer *myLabel1Tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(myLabel1Tap)];
[myLabel1Tap addGestureRecognizer:myLabel1Tap];
UITapGestureRecognizer *myLabel2Tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(myLabel2Tap)];
[myLabel1Tap addGestureRecognizer:myLabel2Tap];
UITapGestureRecognizer *myLabelNTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(myLabelNTap)];
[myLabel1Tap addGestureRecognizer:myLabelNTap];
- (void)myLabel1Tap {
// Perform action
}
- (void)myLabel2Tap {
// Perform action
}
- (void)myLabelNTap {
// Perform action
}
Add a single gesture recognizer to the view that is the superview of your various labels:
UITapGestureRecognizer *myLabelTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(myLabelTapHandler:)];
[myLabelParent addGestureRecognizer:myLabelTap];
Then when you handle the gesture, determine which label was tapped:
-(void)myLabelTapHandler:(UIGestureRecognizer *)gestureRecognizer {
UIView *tappedView = [gestureRecognizer.view hitTest:[gestureRecognizer locationInView:gestureRecognizer.view] withEvent:nil];
// do something with it
}
You can use just one UITapGestureRecognizer
and in your gesture handler (your myLaberXTap
), which has the syntax:
- (void)handleGesture:(UITapGestureRecognizer*)gestureRecognizer {
...
}
use gesture.view
to know which view you are working on.
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