UIImageView *imageView =[WJDControl createImageViewWithFrame:self.bounds ImageName:@"yuan"];
[self addSubview:imageView];
UIImageView *centerImageView =[WJDControl createImageViewWithFrame:CGRectMake(0, 0, 33, 33) ImageName:@"user_location"];
centerImageView.center = imageView.center;
[self addSubview:centerImageView];
CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
opacityAnimation.fromValue = [NSNumber numberWithFloat:1.0];
opacityAnimation.toValue = [NSNumber numberWithFloat:0.0];
opacityAnimation.duration = 2.0f;
opacityAnimation.autoreverses= NO;
opacityAnimation.repeatCount = MAXFLOAT;
// opacityAnimation.speed = 1.0f;
CABasicAnimation * animation2 = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
animation2.fromValue = [NSNumber numberWithDouble:0];
animation2.toValue = [NSNumber numberWithDouble:1];
animation2.duration= 2.0;
animation2.autoreverses= NO;
animation2.repeatCount= FLT_MAX; //"forever"
animation2.removedOnCompletion= YES;
[imageView.layer addAnimation:animation2 forKey:@"scale"];
[imageView.layer addAnimation:opacityAnimation forKey:nil];
【IOS】雷达中心扩散效果
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