如何在标签中进行边框动画？

Question

我想做边框动画,比如将标签的颜色从一种颜色改为两种或多种不同颜色的发光功能.

任何人都可以告诉我如何做到这一点.任何帮助将不胜感激

Answer 1

CALayer的动画应该让你开始.

例如,我使用此代码为按钮的边框宽度设置动画(它使边框更粗,并使背面恢复正常两次).

CABasicAnimation* borderAnimation = [CABasicAnimation animationWithKeyPath:@"borderWidth"];
 [borderAnimation setFromValue:[NSNumber numberWithFloat:2.0f]];
 [borderAnimation setToValue:[NSNumber numberWithFloat:0.0f]];
 [borderAnimation setRepeatCount:2.0];
 [borderAnimation setAutoreverses:NO];
 [borderAnimation setDuration:0.2f];

 [self.addToCommandeBtn.layer addAnimation:borderAnimation forKey:@"animateBorder"];

您也可以为颜色做类似的事情,但您可能需要使用一些UIView动画块

[UIView animateWithDuration:0.4
                 animations:^{
                     // one animation
                 }
                 completion:^(BOOL finished){
                     // ... completion stuff
                     //other animation when the first one completes
                 }
 ]; 

有关CALayere的更多信息,请访问:http://www.raywenderlich.com/2502/introduction-to-calayers-tutorial 或Core Animation:https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual /CoreAnimation_guide/Articles/Headstart.html/http://www.macresearch.org/tutorial-intro-core-animation