iOS/Swift: Using touchesmoved to move UIImageView - ios

Question

new to Swift/iOS. I'm trying to move an UIImageView when touchesmoved is called. But, I can't seem to get it working. The touchesMoved won't find a subview that matches the touch.view and therefore won't move the subview.
There are UILabels in the view that do work with the touchesMoved function, but the UIImageViews will not.
Any ideas would be really helpful. Thanks.
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
let touch = touches.first as UITouch!
let location = touch.locationInView(view)
let imageView = TouchPointModel(frame: CGRectMake(location.x - frameSize * 0.5, location.y - frameSize * 0.5, frameSize, frameSize), image: UIImage(named: "Feedback_Winner.png")!)
view.addSubview(imageView)
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
for touch:AnyObject in touches {
let location = touch.locationInView(view)
for subview in view.subviews {
if touch.view == subview {
print("yahtzee")
subview.center = location
}
}
}
}
Here's the TouchPointModel for reference:
class TouchPointModel: UIImageView {
init(frame:CGRect, image:UIImage) {
super.init(frame: frame)
self.image = image
self.opaque = false
self.userInteractionEnabled = true
UIView.animateWithDuration(1.0, delay: 0.0, options: [.Repeat, .Autoreverse], animations: {
self.transform = CGAffineTransformMakeScale(1.3, 1.3)
}, completion: nil)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}

Answer 1

It looks like you're trying to add an image view at the point where the touch starts, but the view property of a touch never changes. That is, touch.view doesn't change as you move your finger around to different views, and for that reason touch.view will never correspond to the image view that you're adding in touchesBegan(withEvent).
PS: It's more than a little confusing to name your class TouchPointModel, as "model" and "view" classes are two entirely distinct kinds of objects in the standard model-view-controller paradigm.