ipad - 带有许多按钮的 Xcode iPad UIActionSheet 无法正确显示 iOS7

Question

在 iPad 上，新的 ios 7 UIActionSheet 没有正确显示很多按钮。

滚动时不清理 UIActionSheet 的背景。按钮似乎在后台 UIActionSheet 中卡住。

screenshot with problem

我的代码:

UIActionSheet *popupQuery = [[UIActionSheet alloc]; 
for (int i=0; i<[ParamAllList count]; i++) 
{ 
    NSMutableDictionary *Param = [ParamAllList objectAtIndex:i]; 
    [popupQuery addButtonWithTitle:[Param valueForKey:@"name"]]; 
    [[[popupQuery valueForKey:@"_buttons"] objectAtIndex:[[popupQuery valueForKey:@"_buttons"] count]-1] setImage:[UIImage imageNamed:@"add40icon.png"] forState:UIControlStateNormal];
} 
popupQuery.actionSheetStyle = UIActionSheetStyleAutomatic; 
[popupQuery showFromRect:Button_Settings.frame inView:Button_Settings.superview animated:YES];

Answer 1

这是我对 actionSheet 委托(delegate)的解决方法:

- (void)willPresentActionSheet:(UIActionSheet *)actionSheet {
    actionSheet.backgroundColor = [UIColor whiteColor];
    for (UIView *subview in actionSheet.subviews) {
        subview.backgroundColor = [UIColor whiteColor];
    }
}

基于这个答案:
Change Text color in UIActionSheet Buttons