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  • 发光动画

    UIView *whiteView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    [whiteView setBackgroundColor:[UIColor whiteColor]];
    [whiteView setUserInteractionEnabled:NO];
    [self.view addSubview:whiteView];

    CALayer *maskLayer = [CALayer layer];

    // Mask image ends with 0.15 opacity on both sides. Set the background color of the layer
    // to the same value so the layer can extend the mask image.
    maskLayer.backgroundColor = [[UIColor colorWithRed:1.0f green:1.0f blue:1.0f alpha:0.0f] CGColor];
    maskLayer.contents = (id)[[UIImage imageNamed:@"ShineMask.png"] CGImage];

    // Center the mask image on twice the width of the text layer, so it starts to the left
    // of the text layer and moves to its right when we translate it by width.
    maskLayer.contentsGravity = kCAGravityCenter;
    maskLayer.frame = CGRectMake(-whiteView.frame.size.width,
                                 0.0f,
                                 whiteView.frame.size.width * 2,
                                 whiteView.frame.size.height);

    // Animate the mask layer's horizontal position
    CABasicAnimation *maskAnim = [CABasicAnimation animationWithKeyPath:@"position.x"];
    maskAnim.byValue = [NSNumber numberWithFloat:self.view.frame.size.width * 9];
    maskAnim.repeatCount = HUGE_VALF;
    maskAnim.duration = 3.0f;
    [maskLayer addAnimation:maskAnim forKey:@"shineAnim"];

    whiteView.layer.mask = maskLayer;

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  • 原文地址:https://www.cnblogs.com/chenfulai/p/2590009.html
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