NSInvalidArgumentException

Question

添加：（id）发件人后，我收到了此例程的崩溃，因此我可以确定哪个按钮调用了它。当设置为普通旧版toggleView3时，它可以很好地工作。当detailView切换回docView时发生崩溃。

'NSInvalidArgumentException', reason: '*** -[RootViewController toggleView3]: unrecognized selector sent to instance 0x524a00' 2009-04-07 12:29:44.421 eTarot[11405:20b] Stack:

-(IBAction)toggleView3:(id)sender{ 


    if (detailViewController == nil) { 
     [self loadDetailViewController]; 
    } 

    UIView *docView = docViewController.view; 
    UIView *detailView = detailViewController.view; 

    [UIView beginAnimations:nil context:NULL]; 
    [UIView setAnimationDuration:1]; 
    [UIView setAnimationTransition:([docView superview] ? UIViewAnimationTransitionFlipFromRight : UIViewAnimationTransitionFlipFromLeft) forView:self.view cache:YES]; 

    if ([docView superview] != nil) { 
     [detailViewController viewWillAppear:YES]; 
     [docViewController viewWillDisappear:YES]; 
     [docView removeFromSuperview]; 

     [self.view addSubview:detailView]; 
     [self.view insertSubview:detailNavigationBar aboveSubview:detailView]; 
     [docViewController viewDidDisappear:YES]; 
     [detailViewController viewDidAppear:YES]; 

    } else { 
     [docViewController viewWillAppear:YES]; 
     [detailViewController viewWillDisappear:YES]; 
     [detailView removeFromSuperview]; 
     [detailNavigationBar removeFromSuperview]; 
     [self.view addSubview:docView]; 
     [detailViewController viewDidDisappear:YES]; 
     [docViewController viewDidAppear:YES]; 
    } 
    [UIView commitAnimations]; 
} 

Answer 1

当正确的选择器名称是toggleView3: - 即冒号和参数时，您正在发送视图toggleView3。它们可能看起来与你类似，但它们与Objective-C完全不同。

Answer 2

这异常意味着您的应用程序而无需调用toggleView3：发件人的说法地方。由于您的新方法需要参数，因此与调用从未存在的方法相同。

如果您在调试器中查看堆栈跟踪，应该很清楚它来自哪里。构建结果中也可能有警告。