ios 雷达效果 水波效果

gistfile1.txt

//  
//  
  
#import "LPViewController.h"  
  
@interface LPViewController ()  
{  
    CALayer *sublayer2,*sublayer3;  
}  
@end  
  
@implementation LPViewController  
  
- (void)viewDidLoad  
{  
    [super viewDidLoad];  
      
    UIView *v = [[UIView alloc] initWithFrame:self.view.frame];  
    [v setBackgroundColor:[UIColor grayColor]];  
    v.layer.backgroundColor = [UIColor whiteColor].CGColor;  
    [self.view addSubview:v];  
      
      
    sublayer2 = [CALayer layer];  
    sublayer2.borderWidth = 0.5f;  
    sublayer2.borderColor = [UIColor redColor].CGColor;  
    sublayer2.frame = CGRectMake(10, 10, 60, 60);  
    sublayer2.cornerRadius = 60/2;  
    sublayer2.position = v.center;  
    sublayer2.backgroundColor = [UIColor greenColor].CGColor;  
    [v.layer addSublayer:sublayer2];  
      
      
    int count = 4;  
    float duration = 4.0;  
    for (int i = 0; i<count; i++) {  
        CALayer *lay = [CALayer layer];  
        lay.borderWidth = 0.1f;  
        lay.borderColor = [UIColor redColor].CGColor;  
        lay.frame = CGRectMake(10, 10, 60, 60);  
        lay.cornerRadius = lay.frame.size.width/2;  
        lay.position = v.center;  
        [v.layer addSublayer:lay];  
          
        CABasicAnimation *scaleAnimation1 = [CABasicAnimation animationWithKeyPath:@"transform.scale"];  
        scaleAnimation1.fromValue = [NSNumber numberWithFloat:1.0];  
        scaleAnimation1.toValue = [NSNumber numberWithFloat:10.0];  
        scaleAnimation1.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];  
          
          
        CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];  
        opacityAnimation.fromValue = [NSNumber numberWithFloat:1.0];  
        opacityAnimation.toValue = [NSNumber numberWithFloat:0];  
    
          
          
        CAAnimationGroup *animationGroup = [CAAnimationGroup animation];  
        animationGroup.fillMode = kCAFillModeBackwards;  
        animationGroup.duration = duration;  
        animationGroup.autoreverses = NO;   //是否重播，原动画的倒播  
        animationGroup.repeatCount = HUGE_VAL;//HUGE_VALF;     //HUGE_VALF,源自math.h  
        [animationGroup setAnimations:[NSArray arrayWithObjects:opacityAnimation, scaleAnimation1, nil]];  
          
        animationGroup.beginTime = CACurrentMediaTime()+i*duration/count;  
          
          
          
        [lay addAnimation:animationGroup forKey:@"group"];  
    }  
      
}  
- (void)didReceiveMemoryWarning  
{  
    [super didReceiveMemoryWarning];  
    // Dispose of any resources that can be recreated.  
}  
  
@end