How to test if a point is in a view
26,492
Solution 1
CGPoint
is no good with a reference point. If your point is in window's coordinates then you can get it using
CGPoint locationInView = [imageView convertPoint:point fromView:imageView.window];
if ( CGRectContainsPoint(imageView.bounds, locationInView) ) {
// Point lies inside the bounds.
}
You may also call pointInside:withEvent:
method
if ( [imageView pointInside:locationInView withEvent:nil] ) {
// Point lies inside the bounds
}
Solution 2
Tested in Swift 4
view.frame.contains(point)
Solution 3
if(CGRectContainsPoint([myView frame], point))
where point is your CGPoint and myView is your UIImageView
Solution 4
I'll assume you have a full-screen window (pretty reasonable, I think). Then you can transform the point from the window's coordinate space to the UIImageView's using:
CGPoint point = ...
UIWindow window = ...
UIImageView imageView = ...
CGPoint transformedPoint = [window convertPoint:point toView:imageView];
Then, you can test if the point is in the image view's frame as follows:
if(CGRectContainsPoint(imageView.frame, transformedPoint))
{
// do something interesting....
}
Author by
Blane Townsend
Updated on March 25, 2020Comments
-
Blane Townsend about 4 years
I have a
UIImageView
and I have aCGPoint
on the screen. I want to be able to test that point to see if it is in theUIImageView
. What would be the best way to do this?