CODEWITHSUNDEEP
iosuibutton
user1120008
user1120008

Reputation: 1015

UIButton Press and Hold

I'd like to implement a press and hold button. So when you push the button, function A executes, and when you release, function B executes. I found this, but it wasn't what I was quite looking for.

UIButton Touch and Hold

I don't want any repeating action.

Upvotes: 4

Views: 21708

Answers (5)

footyapps27
footyapps27

Reputation: 4042

UILongPressGestureRecognizer Swift 3 & above:

// Add Gesture Recognizer to view

let longPressGestureRecognizer = UILongPressGestureRecognizer(
            target: self,
            action: #selector(handleLongPress(_:)))

view.addGestureRecognizer(longPressGestureRecognizer!)

Upvotes: 1

Ashish
Ashish

Reputation: 1897

I have faced this problem myself, and mostly we use these events:- 

// This event works fine and fires
[button addTarget:self action:@selector(holdDown)
             forControlEvents:UIControlEventTouchDown];

// This does not fire at all
[button addTarget:self action:@selector(holdRelease)
             forControlEvents:UIControlEventTouchUpInside];

Solution:

Use Long Press Gesture Recognizer:

UILongPressGestureRecognizer *btn_LongPress_gesture = [[UILongPressGestureRecognizer alloc] 
        initWithTarget:self action:@selector(handleBtnLongPressGesture:)];
[button addGestureRecognizer:btn_LongPress_gesture];

Implementation of gesture:- 

- (void)handleBtnLongPressGesture:(UILongPressGestureRecognizer *)recognizer { 

  //as you hold the button this would fire
  if (recognizer.state == UIGestureRecognizerStateBegan) {   
    [self buttonDown];
  }

  // as you release the button this would fire
  if (recognizer.state == UIGestureRecognizerStateEnded) {
    [self buttonUp];
  }
}

Upvotes: 20

sudo rm -rf
sudo rm -rf

Reputation: 29524

Just add different selectors to the UIButton based on different events. To set the selector for when you initially press down, do the following

[button addTarget:self action:@selector(buttonDown:) forControlEvents:UIControlEventTouchDown];

and the selector for when your button is released:

[button addTarget:self action:@selector(buttonUp:) forControlEvents:UIControlEventTouchUpInside];

Upvotes: 22

Shubhank
Shubhank

Reputation: 21805

you can implement 

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

method and then check if your button lies in the touch location using CGRectContainsPoint()

then if the user moves the finger

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

will be called..here you should again check if user is still on your button..otherwise stop your function

and

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

is called when user removes finger from the screen

Upvotes: 3

Stavash
Stavash

Reputation: 14304

I think the best solution for you would be to implement with UIGestureRecognizer, where one would be the UITapGestureRecognizer and the other a UILongPressGestureRecognizer

Upvotes: 1

Related Questions