仿Nice tag 雷達閃爍動畫

gistfile1.txt

#pragma mark -- Animation
//动画停止执行的delegate
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
    if ([[anim valueForKey:@"TransformScale"] isEqualToString:@"scaleAnimation"]) {
        //清除上次的shapeLayer 防止内存泄露
        for (CAShapeLayer *shapeLayer in shapeLayers) {
            [shapeLayer removeAnimationForKey:kGroupAnimation];
            [shapeLayer removeFromSuperlayer];
        }
        [shapeLayers removeAllObjects];

        isAperture = NO;
        [self addApertureAnimationDuration:.6f beginTime:0.5f];
        [self addApertureAnimationDuration:.6f beginTime:1.f];

    } else if ([[anim valueForKey:@"animation"] isEqualToString:@"animation"]) {

        if (!isAperture) {
            [imageView.layer removeAnimationForKey:kAnimatiomName];
            [self addAnimationDuration:0.7f beginTime:0.5f];
            isAperture = YES;
        }
    }
}

//添加动画
- (void)addAnimationDuration:(CGFloat)duration beginTime:(CGFloat)beginTime
{
    CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    scaleAnimation.fromValue    = [NSNumber numberWithFloat:1.f];
    scaleAnimation.toValue      = [NSNumber numberWithFloat:1.5f];
    scaleAnimation.duration     = duration;
    scaleAnimation.beginTime    = CACurrentMediaTime() + beginTime;
    scaleAnimation.delegate     = self;
    [scaleAnimation setValue:@"scaleAnimation" forKey:@"TransformScale"];
    [imageView.layer addAnimation:scaleAnimation forKey:kAnimatiomName];
}

//添加光晕效果
- (void)addApertureAnimationDuration:(CGFloat)duration beginTime:(CGFloat)beginTime
{
    CGRect frame = CGRectMake(-CGRectGetMidX(imageView.bounds), -CGRectGetMidY(imageView.bounds), CGRectGetWidth(imageView.bounds), CGRectGetHeight(imageView.bounds));
    UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:frame cornerRadius:CGRectGetWidth(imageView.bounds)];

    CGPoint position = [imageView.superview convertPoint:imageView.center fromView:imageView.superview];

    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    shapeLayer.fillColor     = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.55f].CGColor;
    shapeLayer.strokeColor   = [UIColor clearColor].CGColor;
    shapeLayer.lineWidth     = 0.f;
    shapeLayer.path          = path.CGPath;
    shapeLayer.position      = position;
    shapeLayer.opacity       = 0.f;

    [imageView.superview.layer addSublayer:shapeLayer];
    [shapeLayers addObject:shapeLayer];

    CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    scaleAnimation.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
    scaleAnimation.toValue   = [NSValue valueWithCATransform3D:CATransform3DMakeScale(2.5f, 1.f, 1.f)];

    CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
    opacityAnimation.fromValue = @1;
    opacityAnimation.toValue   = @0;

    CAAnimationGroup *animation = [CAAnimationGroup animation];
    animation.animations = @[scaleAnimation,opacityAnimation];
    animation.duration   = duration;
    animation.beginTime  = CACurrentMediaTime() + beginTime;
    animation.delegate   = self;
    [animation setValue:@"animation" forKey:@"animation"];
    [shapeLayer addAnimation:animation forKey:kGroupAnimation];

}
//停止动画 并将光晕移除
- (void)removeAnimation
{
    [imageView.layer removeAnimationForKey:kAnimatiomName];
    for (CAShapeLayer *shapeLayer in shapeLayers) {
        [shapeLayer removeAnimationForKey:kGroupAnimation];
        [shapeLayer removeFromSuperlayer];
    }
    [shapeLayers removeAllObjects];
}