设置UILabel动画以更改颜色？

Question

I would like to make the text in my UILabel called coloursLabel change text colour by itself. I have tried the following method as another SO answer suggested (albeit for the backgroundColor ) but it still doesn't change. Am I missing something silly?

UILabel *coloursLabel = [[UILabel alloc] init];
    coloursLabel.text = @"This sentence is colourful!";
    [coloursLabel sizeToFit];
    coloursLabel.center = self.view.center;
    coloursLabel.frame = CGRectOffset(coloursLabel.frame, timeForPage(6), 0);

[UIView animateWithDuration:2.0 animations:^{
    coloursLabel.textColor = [UIColor greenColor];
    coloursLabel.textColor = [UIColor redColor];
    coloursLabel.textColor = [UIColor blueColor];
    coloursLabel.textColor = [UIColor yellowColor];
    coloursLabel.textColor = [UIColor blackColor];
} completion:NULL];

coloursLabel shows the correct text but the text is in black.

Any help would be much appreciated!

Answer 1

UILabel's textColor is not animatable. You could write your own Label class, using a CATextLayer as mask and animate its layer's backgroundColor.