ios点击产生波纹效果

by 伍雪颖

- (void)viewDidLoad

{

    [super viewDidLoad];

    RippleView = [[UIView alloc] initWithFrame:(CGRect){0,0,300,300}];

    RippleView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.3];

    RippleView.layer.cornerRadius = 150;

    RippleView.layer.masksToBounds=true;

    RippleView.alpha=0;

}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    [super touchesBegan:touches withEvent:event];

    UITouch *touch = [touches anyObject];

    CGPoint location = [touch locationInView:self.view];

    [self.view addSubview:RippleView];

    RippleView.center = location;

    RippleView.transform = CGAffineTransformMakeScale(0.5, 0.5);

    [UIView animateWithDuration:0.1

                     animations:^{

                         RippleView.alpha=1;

                         self.view.alpha=0.3;

                     }];

    [UIView animateWithDuration:0.7

                          delay:0

                        options:UIViewAnimationOptionCurveEaseInOut

                     animations:^{

                         RippleView.transform = CGAffineTransformMakeScale(1,1);

                         RippleView.alpha=0;

                         self.view.alpha=1;

                     } completion:^(BOOL finished) {

                         [RippleView removeFromSuperview];

                     }];

}