How to Animate UILabel textColor Properties

最新推荐文章于 2023-07-20 09:44:20 发布

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最新推荐文章于 2023-07-20 09:44:20 发布

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原文链接：http://www.cnblogs.com/ioriwellings/p/6590279.html

本文介绍了一种在iOS开发中为UILabel属性创建动画效果的方法。由于直接动画化UILabel的属性如textColor不可行，文章提供了一个解决方案：通过在过渡效果上操作UILabel本身来实现淡入淡出的动画，而非直接改变其属性。

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How to Animate UILabel Properties

UILabel properties cannot be easy animated due to some various reasons, so code like this will have no effect on it:

self.someLabel.textColor = [UIColor blueColor];

[UIView animateWithDuration:0.3
                  animation:^{
  
                      self.someLabel.textColor = [UIColor redColor];
                  }];

But there is a simple solution. Instead of animating property we will perform transition on object itself.

Using transitionWithView should solve our problem:

self.someLabel.textColor = [UIColor blueColor];

[UIView transitionWithView:self.someLabel
                  duration:0.3
                   options:UIViewAnimationOptionTransitionCrossDissolve
                animations:^{

                      self.someLabel.textColor = [UIColor redColor];

                } completion:nil];