How to animate the background color of a UILabel?

user_136 0
Viewed 52758

This looks like it should work, but doesn't. The color turns green at once.

self.labelCorrection.backgroundColor = [UIColor whiteColor];
[UIView animateWithDuration:2.0 animations:^{
    self.labelCorrection.backgroundColor = [UIColor greenColor];
}];
core-animation iphone ios
11 Answers

Swift 4.1 UILabel Extension:

Add this extension to your code:

extension UILabel {

    /** Animates the background color of a UILabel to a new color. */
    func animateBackgroundColor(to color : UIColor?, withDuration : TimeInterval, completion : ((Bool) -> Void)? = nil) {
        guard let newColor = color else { return }
        self.backgroundColor = .clear
        UIView.animate(withDuration: withDuration, animations: {
            self.layer.backgroundColor = newColor.cgColor
        }, completion: completion)
    }

}

You should use it like this:

myUILabel.animateBackgroundColor(to: .red, withDuration: 0.5)

Now, if you want to restore the original color, use it like this:

// Storing the orignal color:
let originalColor = myUILabel.backgroundColor

// Changing the background color:
myUILabel.animateBackgroundColor(to: .red, withDuration: 0.5)

// ... Later:

// Restoring the original color:
myUILabel.animateBackgroundColor(to: originalColor, withDuration: 0.5, completion: {
    (value: Bool) in
    myUILabel.backgroundColor = originalColor
})
user_60633780
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