How to blink a button iOS swift?

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Solution:

 The below extension is used for blink the button.

You can call the extension by using the code.


                btn.blink()

Function:
extension UIButton {
    func blink() {
        self.alpha = 0.0;
        UIView.animate(withDuration: 0.6, //Time duration you want,
            delay: 0.0,
            options: [.curveEaseInOut, .autoreverse, .repeat],
            animations: { [weak self] in self?.alpha = 1.0 },
            completion: { [weak self] _ in self?.alpha = 0.0 })
    }
    
    func stopBlink() {
        self.layer.removeAllAnimations()
        self.alpha = 1.0;
        self.isHidden = false
        // [self.layer removeAllAnimations];
    }
}

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