yep itās working nowā¦ thanks for the great tutorialā¦
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Hey Patrick,
I was having that same exact issue, but found a solution. Itās super easy, too!
Look for the handlePan function. Instead of:
let translation = recognizer.translationInView(self.view)
use this:
let translation = recognizer.translationInView(self.superview)
and if youāre using Swift 3:
let translation = recognizer.translation(in: self.superview)
hope that helps!
Can you tap on an image, and the image says a word (Iām assuming using AVSpeechSynthesizer)?
I havenāt done that for a very long while - pre AVSpeechSynthesizer.
Thereās an older tutorial here: https://www.raywenderlich.com/64623/make-narrated-book-using-avspeechsynthesizer-ios-7
Hi Caroline, is it possible to have a UIGestureRecognizer everywhere in an APP?
I have many Views in my App and i need to detect globaly the double tap with 2 fingers but without a new recognizer in ervery view.
I tried [myTap addTarget:[[UIApplication sharedApplication]keyWindow] action:@selector(handleMyTap:)];
but it doesnt work.
@udo - a UIGestureRecognizer is attached to one view and one view alone.
I havenāt done this myself, but you could experiment with implementing hitTest(_:with:) on your root UIView.
hitTest(_:with:) will intercept all touches on a window. You can then reject the touch by returning nil or return the view that is touched.
Not sure how that would go with a double tap though. You might have to do some further research.
Hi @caroline ! Thanks for the tutorial, itās really helpful.
Iām trying to implement it in swift 3 but I get stuck in the rotation transformation. Since
view.transform = CGAffineTransformRotate(view.transform, recognizer.rotation)
recognizer.rotation = 0
itās not working anymore, I think that it should be replaced by
view.transform = view.transform.rotated(by: recognizer.rotation)
recognizer.rotation = 0
But this just doesnāt work. The image shakes a little bit, but it doesnāt rotate. Is like the code is not adding radiands to the previous transform (what I tried to do) but starting again each time.
If i take off ārecognizer.rotation = 0ā, as you said, crazy things happens.
Do you know what could be going on?
Thanks!
Hi again. I just wanted you to know that I have finally figured it out.
What happened was that my first aproach to replace the old code with the Swift 3 code was:
view.transform = CGAffineTransform(rotationAngle: recognizer.rotation)
and
view.transform = CGAffineTransform(scaleX: recognizer.scale, y: recognizer.scale)
Then I realized that this was creating a new CGAffineTransform each time, so I started trying with the other aproach (the correct one) in the Rotation code, BUT NOT in the Scale codeā¦ So, since āshouldRecognizeSimultaneouslyā¦ā was set to true, when I was testing rotation, I was also (unwittingly) scaling the image, so the wrong code was called in the Rotation code restarting from time to time the transform property of the viewā¦
Now I can sleep well 
Thanks again for the tutorial!
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@msastre73 - Iām glad you figured it out, and thank you very much for coming back and posting your solution :].
Thank you Caroline, for great tutorial.
Works perfect. But what if I use it with MKAnnotationView? Actually I need to update annotation coordinates since pan gesture doesnāt do it. First I tried to use native isDragable=true property of MKAnnotationView. It also work, but I still canāt detect the coordinates changing while the dragging process, exactly while I hold my finger on annotation view and drag. So I decided to use this tutorial approach, but here is another problem. Maybe you could save me a couple of weeks and help. Thank you!
@zhydanovajulia - I havenāt done this myself. You could try the solutions here: ios - MKAnnotationView and tap detection - Stack Overflow