iOS blink animation on UIView with finite number of times

Question

I am trying to create a blinking effect on the UIView. Currently I am using a code which blinks the UIView with infinite number of times. the Code looks like this

WhatI have done so far:

 func startBlink() {
                  UIView.animate(withDuration: 0.8,//Time duration
                                delay:0.0,
                                options:[.allowUserInteraction, .curveEaseInOut, .autoreverse, .repeat],
                                animations: { self.alpha = 0 },
                                completion: nil)
        }

But this code blinks the ui view for infinite number of time. I used another code but that was blinking for one time only.

What I want:

So I am pretty close but I really want to blink the UIView for finite number of times i.e 30 times, and it must stop after 30th blink.

Please help me in this, I think I have clear in my question. Please help me out.

Answer 1

Use this function to animate View. I hope it can help

extension UIView {  
        func flash(numberOfFlashes: Float) {
           let flash = CABasicAnimation(keyPath: "opacity")
           flash.duration = 0.2
           flash.fromValue = 1
           flash.toValue = 0.1
           flash.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
           flash.autoreverses = true
           flash.repeatCount = numberOfFlashes
           layer.add(flash, forKey: nil)
       }
 }

Answer 2

There is a builtin in class function for the count and call it in the block.

class func setAnimationRepeatCount(_ repeatCount: Float)

  func startBlink() {
              UIView.animate(withDuration: 0.8,//Time duration
                            delay:0.0,
                            options:[.allowUserInteraction, .curveEaseInOut,    .autoreverse, .repeat],
                            animations: { 

       UIView.setAnimationRepeatCount(30) // repeat 30 times.

     self.alpha = 0 
       },
                            completion: nil)
    }