向UIImageview添加手势

Question

Im trying to add a tapgesture to UIImageview. but the code bellow which im using right now is not working.

I have added this to my viewdidload (notice that LabelNewsImage is my UIImageview):

LabelNewsImage.userInteractionEnabled = YES;
UITapGestureRecognizer *tapGestureEnlarge = [[UITapGestureRecognizer alloc] initWithTarget:self  action:@selector(tapGesture:)];
tapGestureEnlarge.numberOfTapsRequired = 1;
[self.LabelNewsImage addGestureRecognizer:tapGestureEnlarge];

Answer 1

You need to properly connect LabelNewsImage to the image view instance. Presumably LabelNewsImage is an IBOutlet and your image view is created in an XIB or Storyboard. You need to drag a connection from the LabelNewsImage property to the image view to connect them.

See the docs (including the video ).

Answer 2

The response selector tapGesture: Is it probable that you write the method like

- (void)tapGesture
{
    // TODO:
}

But it should like this

- (void)tapGesture:(NSDictonary *)dic
{
    // TODO:
}