UIView.animate不会延迟显示视图

Question

I have an AnimationHelper class with this method:

func display(view: UIView, withDelay: TimeInterval) {

  UIView.animate(withDuration: 0.2, delay: withDelay, options: .curveEaseIn, animations: {
    view.isHidden = false
  }, completion: nil)
}

And call this method from the another class:

animationHelper.display(view: labelContainerView, withDelay: 1) 

and labelContainerView should display with a delay but appears immediately.

How can I display it with a delay?

Answer 1

isHidden is not an animatable property. You can set alpha to 1.0 to make it appear with animation:

view.alpha = 1.0