使图片自动移动的方法

最新推荐文章于 2023-09-19 12:19:58 发布

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使图片自动移动的方法

- (void)setOffSetAnimation:(UIImageView *)imageView Duration:(NSInteger)duration{
    NSInteger imageHeight = imageView.image.size.height;
    NSInteger imageWidth = imageView.image.size.width;
    NSInteger frameWidth = imageView.frame.size.width;
    NSInteger frameHeight = imageView.frame.size.height;
    NSInteger xOffSet = (frameHeight*imageWidth/imageHeight-frameWidth)/2;
    
    CAKeyframeAnimation *animation;
    animation = [CAKeyframeAnimation animationWithKeyPath:@"position.x"];
    animation.duration = duration;
    animation.repeatCount = HUGE_VALF;
    animation.values = [NSArray arrayWithObjects:
                        [NSNumber numberWithFloat:160.0f],
                        [NSNumber numberWithFloat:160 + xOffSet],
                        [NSNumber numberWithFloat:160.0f],
                        [NSNumber numberWithFloat:160 - xOffSet],
                        [NSNumber numberWithFloat:160.0f], nil];
    animation.removedOnCompletion = NO;
    [imageView.layer addAnimation:animation forKey:nil];
}