Question

I have a button that can be dragged around on the screen. I was wondering if there is a way to keep the button inside the frame of the view.

I have used this code to make the button drag able:

UIPanGestureRecognizer *buttonPanRecognizer;
buttonPanRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(setObjectLocation:)];
[NewButton addGestureRecognizer:buttonPanRecognizer];

- (void)setObjectLocation:(UIPanGestureRecognizer *)recognizer {

CGPoint location = [recognizer locationInView:self.view];

if (CGRectContainsPoint([NewButton frame], location)) {              // NewButton
    NewButton.center = location;
} 
else if (CGRectContainsPoint([NewLabel frame], location)) {          // NewLabel
    NewLabel.center = location;
} }

I also want to be able to keep other kinds of objects inside.

Thansk in advance 🙂

The problem is that it is possible to drag parts of the UIButton outside the screen.

Answer 1

I have to agree that your problem is not quite clear. What is all the stuff with the label supposed to to. Generally, to keep a button inside a frame, you have everything you need already there:

UIPanGestureRecognizer* buttonPanRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(setObjectLocation:)];
[NewButton addGestureRecognizer:buttonPanRecognizer];

- (void)setObjectLocation:(UIPanGestureRecognizer *)recognizer {

    CGPoint location = [recognizer translationInView:self.view];

    if (CGRectContainsPoint(self.view.frame, location)) {
       NewButton.center = location;
    } 
}