[Swift] set UILabel fade-in fade-out continuity
extension UILabel {
/**
Set Text With animation fadein fadeout
- parameter duration: NSTimeInterval?
*/
public func setTextAnimation(duration: TimeInterval?, completion:(()->())? = nil) {
UIView.animate(withDuration: duration!, delay: 0.0, options: UIViewAnimationOptions.curveEaseOut, animations: {
self.alpha = 0.0
}, completion: {
(finished: Bool) -> Void in
// Fade in
UIView.animate(withDuration: duration!, delay: 0.0, options: UIViewAnimationOptions.curveEaseIn, animations: {
self.alpha = 1.0
}, completion: {
(finished: Bool) -> Void in
self.setTextAnimation(duration: duration!)
})
})
}
}
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