UIView.animate does not work on background color

Question

I have multiple labels with lightGray background color, and I want to animate their colors to UIColor.clear:

UIView.animate(withDuration: 5.0, animations: {
                    self.titleLabel.backgroundColor = UIColor.clear
                    self.dateLabel.backgroundColor = UIColor.clear
                    self.categoryLabel.backgroundColor = UIColor.clear
                })

But color changes instantly! Why?

score 2 · Accepted Answer · edited May 23 '17 at 12:13

2

Well, I dont know the reason behind this why Apple didnt allow to animate the background color change, but here is a solution provided in another stackoverflow's post, which is as follows:

#import <QuartzCore/QuartzCore.h>

...

theLabel.layer.backgroundColor = [UIColor whiteColor].CGColor;

[UIView animateWithDuration:2.0 animations:^{
    theLabel.layer.backgroundColor = [UIColor greenColor].CGColor;
} completion:NULL];

Another hack is that you make a UIView behind UILabel, and give UILabel clear color, this way you can animate the color change of UIView

edited May 23 '17 at 12:13

Community

1
1

answered Dec 16 '16 at 07:51

Munahil

2,381
1
14
24

Is it Objective-c? :) – Ahmad F Dec 16 '16 at 07:52
Yes, you need it in Swift? – Munahil Dec 16 '16 at 07:52
1

Not me, @RankoR does, please recheck the question, the code snippet is Swift code and there is no objective-c tag. That's why I think it should be Swift. Thank you for the answer :) – Ahmad F Dec 16 '16 at 07:59
It is just for reference :) – Munahil Dec 16 '16 at 08:02
Thanks, translated this to Swift and it works! – artem Dec 16 '16 at 08:26

UIView.animate does not work on background color

1 Answers1