UIActionSheet无效的参数不满足：view！= nil

问题描述

我在导航堆栈上弹出一些视图控制器之后得到这个错误，最后我通过一个操作表提出问题。我得到错误参数不满足 view！= nil ，这驱动我疯了，因为它事实不是一个 nil

I'm getting this error after popping some view controllers on a navigation stack, and at the end I get to ask a question through an action sheet. I'm getting the error parameter not satisfying view != nil, which drives me crazy because it-so facto is not a nil value when I check before calling the action sheet.

   if (self.view != nil) {
            NSLog(@"view is not nil");
        }
UIActionSheet *actionSheet = [[UIActionSheet alloc]initWithTitle:@"title" delegate:nil cancelButtonTitle:@"cancel" destructiveButtonTitle:@"destructive" otherButtonTitles:nil];
    [actionSheet showInView:self.view];




推荐答案

很可能你试图显示的视图UIActionSheet中未附加到窗口。在视图附加到窗口后尝试调用showInView。假设上面的代码在视图控制器实现，尝试调用它在viewDidLoad而不是loadView。

Very likely that the view you are attempting to display the UIActionSheet in is not attached to the window yet. Try calling showInView after the view is attached to a window. Assuming the above code is in view controller implementation, try calling it in viewDidLoad instead of loadView.

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