Question

我是动画的新手，我找不到有关如何创建警示灯的数据（简单的红色警示灯闪烁）。

我知道如何为CALayer制作动画以及Quartz 2D的基础知识，我只是在寻找关于如何实现背光效果的教程或方向？

由于沙尼

Answer 1

非常hacky代码（有效但尝试不在生产中使用它）：

self.uiView1.backgroundColor = [UIColor redColor];

CABasicAnimation* selectionAnimation1 = [CABasicAnimation 
                                        animationWithKeyPath:@"opacity"];

selectionAnimation1.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];

selectionAnimation1.fromValue = [NSNumber numberWithFloat:0.0];
selectionAnimation1.toValue = [NSNumber numberWithFloat:1.0];

selectionAnimation1.duration = 0.10;
selectionAnimation1.repeatCount = 20;

[self.uiView1.layer addAnimation:selectionAnimation1
                       forKey:@"opacity"];


self.uiView2.backgroundColor = [UIColor blackColor];

CABasicAnimation* selectionAnimation2 = [CABasicAnimation 
                                        animationWithKeyPath:@"opacity"];

selectionAnimation2.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];

selectionAnimation2.fromValue = [NSNumber numberWithFloat:1.0];
selectionAnimation2.toValue = [NSNumber numberWithFloat:0.0];

selectionAnimation2.duration = 0.10;
selectionAnimation2.repeatCount = 20;

[self.uiView2.layer addAnimation:selectionAnimation2
                          forKey:@"opacity"];

uiView1＆amp; uiView2完全相互重叠。您可以用两个UIImageView替换两个uiView，其中一个具有打开的光图像（红色），另一个具有关闭的光（黑色/灰色）。在这种情况下，背景颜色变化将是多余的。

使用Quartz 2D或CALayer动画制作“红色警报”动画效果？

1 个答案: