[英]Crashing iOS app after creating a new view
I'm just starting to learn creating iOS apps and so I'm just a noob in it. 我刚刚开始学习如何创建iOS应用,所以我只是其中的菜鸟。 Especially because of the different approach it has on handling navigation and interaction between UI and Code.
特别是由于它在处理导航和UI与代码之间的交互方面具有不同的方法。 :)
:)
Ok I'm using xCode 5 with SDK version 7. I created a single view application and it gave me a .storyboard
file which I guess replaces the .xib
which used to be there when I watch tutorial videos. 好吧我使用的Xcode 5 SDK版本7.我创建了一个单一视图的应用程序,它给了我一个
.storyboard
我猜替换文件.xib
这曾经是那里当我观看教程视频。
So I designed a simple UI as the main
view and now I want to have another view as the landing
view. 因此,我设计了一个简单的UI作为
main
视图,现在我想将另一个视图作为landing
视图。 So it should come in before the main
view. 因此,它应该出现在
main
视图之前。 I went ahead and from New File...
I created an Objective-C class which is a subclass of UIViewController
and named it Detail
. 我继续并从
New File...
创建了一个Objective-C类,它是UIViewController
的子类,并将其命名为Detail
。 Surprisingly it gave me a .xib
file again. 令人惊讶的是,它又给了我一个
.xib
文件。 Fair enough. 很公平。 Then I just put a simple input in the UI to just preview it.
然后,我只在UI中输入一个简单的输入即可预览它。
Then from Project Settings, in the General tab, I changed the Main Interface
to match the new .xib
file I created. 然后从“项目设置”的“常规”选项卡中,更改了“
Main Interface
以匹配我创建的新.xib
文件。 But when I launched the application, it crashed and I don't know what the problem is. 但是,当我启动该应用程序时,它崩溃了,我不知道问题出在哪里。
Here is the stack trace: 这是堆栈跟踪:
2013-11-27 18:31:21.735 TestViewSwitching[10123:70b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIApplication 0x8b35dc0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key view.'
*** First throw call stack:
(
0 CoreFoundation 0x0174c5e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x014bb8b6 objc_exception_throw + 44
2 CoreFoundation 0x017dc6a1 -[NSException raise] + 17
3 Foundation 0x0117c9ee -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282
4 Foundation 0x010e8cfb _NSSetUsingKeyValueSetter + 88
5 Foundation 0x010e8253 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267
6 Foundation 0x0114a70a -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 412
7 UIKit 0x004cba15 -[UIRuntimeOutletConnection connect] + 106
8 libobjc.A.dylib 0x014cd7d2 -[NSObject performSelector:] + 62
9 CoreFoundation 0x01747b6a -[NSArray makeObjectsPerformSelector:] + 314
10 UIKit 0x004ca56e -[UINib instantiateWithOwner:options:] + 1417
11 UIKit 0x004cc2fb -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 165
12 UIKit 0x002293bb -[UIApplication _loadMainNibFileNamed:bundle:] + 58
13 UIKit 0x002296e9 -[UIApplication _loadMainInterfaceFile] + 245
14 UIKit 0x0022828f -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 543
15 UIKit 0x0023c87c -[UIApplication handleEvent:withNewEvent:] + 3447
16 UIKit 0x0023cde9 -[UIApplication sendEvent:] + 85
17 UIKit 0x0022a025 _UIApplicationHandleEvent + 736
18 GraphicsServices 0x036df2f6 _PurpleEventCallback + 776
19 GraphicsServices 0x036dee01 PurpleEventCallback + 46
20 CoreFoundation 0x016c7d65 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
21 CoreFoundation 0x016c7a9b __CFRunLoopDoSource1 + 523
22 CoreFoundation 0x016f277c __CFRunLoopRun + 2156
23 CoreFoundation 0x016f1ac3 CFRunLoopRunSpecific + 467
24 CoreFoundation 0x016f18db CFRunLoopRunInMode + 123
25 UIKit 0x00227add -[UIApplication _run] + 840
26 UIKit 0x00229d3b UIApplicationMain + 1225
27 TestViewSwitching 0x0000211d main + 141
28 libdyld.dylib 0x01d7670d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
This process in Android is pretty straight forward, but I don't know why Apple tries to make everything harder for developers. Android中的此过程非常简单,但是我不知道为什么Apple会尝试使开发人员更难。 They couldn't just set up a type which generates a new view ready to go?
他们不能只建立一个可以生成新视图的类型吗?
@Miro Markarian,您可以检查.xib文件中的视图出口。它可能已断开连接或损坏。通常是由于这个原因而引起的。请尝试将视图控制器视图的出口添加到.xib视图中。
主视图控制器的.xib
上的视图出口未正确连接到其file owner
。
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