获取UIPopoverBackgroundVisualEffectView的警告

Question

我UIActionSheet在我的视图中呈现了一个,其中一个操作表的按钮显示了另一个操作表.当我在iPad上展示第二个操作表时,我在日志中收到此警告消息:

要求UIPopoverBackgroundVisualEffectView为其不透明度设置动画.这将导致效果出现断裂,直到不透明度返回到1.

这是我的代码:

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Option"] delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Sort", nil];
actionSheet.tag = 1;
[actionSheet showInView:self.view];

在代表中:

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    [self showSortAction];
}

-(void)showSortAction {    
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Sort By" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"A-Z", @"Z-A", @"Newer to older", @"Older to newer", nil];        
    actionSheet.tag = 2;
    [actionSheet showInView:self.view];
}