iOS开发之如何获取视图在屏幕中显示的位置

extension UIView {
 func zhmfPositionInScreen() -> CGPoint {
 /// 先判断是否有父视图，如果没有父视图，直接返回视图的位置就行
 if let superView = self.superview {
  /**
  判断父视图是否是UIScrollView或者继承自UIScrollView
  
  先使用视图在屏幕上的位置使用视图的位置与父视图的位置X与Y分别相加
  
  如果父视图不是UIScrollView并且不继承自UIScrollView，则直接返回结果
  
  如果父视图是UIScrollView或者继承自UIScrollView

  还需要分别减去UIScrollView的scrollViewOffset.x和scrollViewOffset.y，然后返回结果
  */
  if let scrollView = superView as? UIScrollView {
  let position = CGPoint.init(x: self.frame.origin.x, y: self.frame.origin.y)
  let superPosition = superView.zhmfPositionInScreen()
  let scrollViewOffset = scrollView.contentOffset
  return CGPoint.init(x: superPosition.x + position.x - scrollViewOffset.x , y: superPosition.y + position.y - scrollViewOffset.y)
  } else {
  let superPosition = superView.zhmfPositionInScreen()
  let position = self.frame.origin
  return CGPoint.init(x: superPosition.x + position.x, y: superPosition.y + position.y)
  }
 } else {
  return self.frame.origin
 }
 }
}

button.zhmfPositionInScreen()

UIWindow * window=[[[UIApplication sharedApplication] delegate] window];
 CGRect rect=[view1 convertRect: view1.bounds toView:window];