How to detect finger moves in or out my customized UIView - ios

Question

I have a customized UIView
#interface EColumn : UIView
I have many instances of this EColumn in it's super view.
How can i detect when the finger hold and moves in the area of this UIView, and when it move out.
I don't mean a tap Gesture, i can detect tap Gesture by using this:
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(taped:)];
[self addGestureRecognizer:tapGesture];

Answer 1

#implementation EColumn
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UIView *view = [self touchedViewWithTouches:touches andEvent:event];
NSLog(#"%#",view);
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UIView *view = [self touchedViewWithTouches:touches andEvent:event];
NSLog(#"%#",view);
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UIView *view = [self touchedViewWithTouches:touches andEvent:event];
NSLog(#"%#",view);
}
- (UIView *)touchedViewWithTouches:(NSSet *)touches andEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:touch.view];
UIView *touchedView;
for (UIView *view in self.subviews)
{
if(CGRectContainsPoint(view.frame, touchLocation))
{
touchedView = view;
break;
}
}
return touchedView;
}
#end

Answer 2

You can detect the finger hold for specific time with the UILongPressGestureRecognizer . For this, you can also specify minimumPressDuration and numberOfTouchesRequired
UILongPressGestureRecognizer *longPressRecognizer =
[[UILongPressGestureRecognizer alloc]
initWithTarget:self
action:#selector(longPressDetected:)];
longPressRecognizer.minimumPressDuration = 3;
longPressRecognizer.numberOfTouchesRequired = 1;
[self addGestureRecognizer:longPressRecognizer];
For detecting moves, you can use UIPanGestureRecognizer
UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(move:)];
[panRecognizer setMinimumNumberOfTouches:1];
[panRecognizer setMaximumNumberOfTouches:1];
[self addGestureRecognizer:panRecognizer];