本文介绍了如何动画更改UITextField的边框颜色？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我从：
Update: Ok, so trying the following implicit animation:
[CATransaction begin];
[CATransaction setValue:[NSNumber numberWithFloat:5.0f] forKey:kCATransactionAnimationDuration];
myUITextField.layer.borderColor = [UIColor greenColor].CGColor;
[CATransaction commit];
这也没有动画，效果相同：它立即改变颜色（顺便说一下，哪里有对于layer.borderColor记录的kCATransactionAnimationDuration的默认值是什么？）
And that doesn't animate either, same effect: it changes colour instantly (as an aside, where's the default for kCATransactionAnimationDuration for layer.borderColor documented?)
推荐答案
我相信 CALayer c> UIView 动画块中的$ c>属性不可动画。您需要设置 CABasicAnimation 并将该动画添加到图层中。
I believe that CALayer properties are not animatable in a UIView animation block. You would need to set up a CABasicAnimation and add that animation to the layer instead.
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