ScrollView indicators 一直显示

最新推荐文章于 2024-04-07 10:26:12 发布

原创最新推荐文章于 2024-04-07 10:26:12 发布 · 450 阅读

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#移动开发

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本文详细介绍了如何在iOS开发中自定义视图的垂直滚动和水平滚动效果，包括判断视图是否允许调整透明度以及如何适配不同尺寸的滚动场景。

需要自己设置一个tag

#define noDisableVerticalScrollTag 836913
#define noDisableHorizontalScrollTag 836914

@implementation UIImageView (ForScrollView) 

- (void) setAlpha:(float)alpha {
    
    if (self.superview.tag == noDisableVerticalScrollTag) {
        if (alpha == 0 && self.autoresizingMask == UIViewAutoresizingFlexibleLeftMargin) {
            if (self.frame.size.width < 10 && self.frame.size.height > self.frame.size.width) {
                UIScrollView *sc = (UIScrollView*)self.superview;
                if (sc.frame.size.height < sc.contentSize.height) {
                    return;
                }
            }
        }
    }
    
    if (self.superview.tag == noDisableHorizontalScrollTag) {
        if (alpha == 0 && self.autoresizingMask == UIViewAutoresizingFlexibleTopMargin) {
            if (self.frame.size.height < 10 && self.frame.size.height < self.frame.size.width) {
                UIScrollView *sc = (UIScrollView*)self.superview;
                if (sc.frame.size.width < sc.contentSize.width) {
                    return;
                }
            }
        }
    }
    
    [super setAlpha:alpha];
}
@end