objective-c NSInvalidArgumentException
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原文地址: http://stackoverflow.com/questions/726727/
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NSInvalidArgumentException
提问by Alan
I'm getting a crash from this routine after adding the :(id)sender so I could determine which button called it. When set up as plain old toggleView3 it works perfectly. The crash occurs when detailView is toggled back to docView.
添加 :(id)sender 后，我从这个例程中崩溃了，所以我可以确定哪个按钮调用了它。当设置为普通的旧 toggleView3 时，它可以完美运行。当 detailView 切换回 docView 时会发生崩溃。
'NSInvalidArgumentException', reason: '*** -[RootViewController toggleView3]: unrecognized selector sent to instance 0x524a00'
2009-04-07 12:29:44.421 eTarot[11405:20b] Stack:
'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];
}
回答by Chuck
You're sending a view the message toggleView3when the correct name of the selector is toggleView3:— that is, with a colon and argument. They may look similar to you, but they're totally different methods to Objective-C.
You're sending a view the message toggleView3when the correct name of the selector is toggleView3:— that is, with a colon and argument. 它们可能看起来与您相似，但它们是与 Objective-C 完全不同的方法。
回答by Marc Charbonneau
That exception means your application is calling toggleView3 without the :sender argument somewhere. Since your new method requires an argument, it's the same as calling a method that never existed.
该异常意味着您的应用程序在某处调用 toggleView3 而没有 :sender 参数。由于您的新方法需要一个参数，因此它与调用一个从未存在过的方法相同。
If you look through the stack trace in the debugger it should be pretty clear where it's coming from. There's probably a warning in the build results, too.
如果您查看调试器中的堆栈跟踪，应该很清楚它来自哪里。构建结果中也可能有警告。
