iPhone UILabel动画

Question

我有一个UILabel,当标签中的值发生变化时,我想从另一种颜色突出显示它的背景颜色并存在2,3秒并恢复正常颜色.

任何人都知道如何做到这一点？

Answer 1

1. 添加quartzCore作为框架
2. 添加一个导入QuartzCore/QuartzCore.h

3. 使用此代码

   - (void) initController
   {
         UIButton *myButton = [view viewWithTag:1]; // Just reference the button you have
         [myButton addTarget:self action:@selector(animateLabel) forControlEvents:UIControlEventTouchUpInside];  
   }
   
   - (void) animateLabel
   {
   
     CABasicAnimation* highlightAnim = [CABasicAnimation animationWithKeyPath:@"backgroundColor"];
     highlightAnim.toValue = (id)[UIColor blueColor].CGColor;
     highlightAnim.duration = 2;          // In seconds 
     highlightAnim.autoreverses = YES;    // If you want to it to return to the normal color
     [label.layer addAnimation:highlightAnim forKey:nil];
    }