uiactionsheet的背景色 [英] background color of uiactionsheet

问题描述

我尝试更改操作表的背景颜色，我只使用以下方法:

I try to change the background color of my actionsheet, I just use the method:

[actionSheet setBackgroundColor:[UIColor colorWithRed:30 green:30 blue:30 alpha:0.5]];

[actionSheet setBackgroundColor:[UIColor colorWithRed:30 green:30 blue:30 alpha:0.5]];

，然后将其放在willPresentActionSheet中.但是背景颜色没有变化，为什么?

and I put it in the willPresentActionSheet. But the background color don't change, why?

推荐答案

• 添加QuartzCore.framework
• 为操作表设置委托
• 为操作表设置样式:UIActionSheetStyleBlackTranslucent
• 覆盖方法willPresentActionSheet

#import "QuartzCore/QuartzCore.h"
...

yourActionSheet.delegate = self;
yourActionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent;
...

- (void)willPresentActionSheet:(UIActionSheet *)actionSheet {
    [[actionSheet layer] setBackgroundColor:[UIColor redColor].CGColor];
}

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