我有一个非常简单的基于窗口的应用程序，我只是将导航 View Controller 作为窗口的 Root View Controller ，它崩溃了。这是我在模板项目中唯一更改的内容:
@interface AppDelegate : NSObject <UIApplicationDelegate> {
UINavigationController *navigationController;
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
navigationController = [[UINavigationController alloc] init];
[[self window] setRootViewController:navigationController];
[self.window makeKeyAndVisible];
return YES;
}
它崩溃说:
2011-05-26 20:18:57.194 ZebraSDKTest[5560:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UICustomObject 0x8b3d760> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key navigationController.'
*** Call stack at first throw:
(
0 CoreFoundation 0x00dbf5a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x00f13313 objc_exception_throw + 44
2 CoreFoundation 0x00dbf4e1 -[NSException raise] + 17
3 Foundation 0x00791677 _NSSetUsingKeyValueSetter + 135
4 Foundation 0x007915e5 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 285
5 UIKit 0x0020d30c -[UIRuntimeOutletConnection connect] + 112
6 CoreFoundation 0x00d358cf -[NSArray makeObjectsPerformSelector:] + 239
7 UIKit 0x0020bd23 -[UINib instantiateWithOwner:options:] + 1041
8 UIKit 0x0020dab7 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 168
9 UIKit 0x0001317a -[UIApplication _loadMainNibFile] + 172
10 UIKit 0x00013cf4 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 291
11 UIKit 0x0001e617 -[UIApplication handleEvent:withNewEvent:] + 1533
12 UIKit
0x00016abf -[UIApplication sendEvent:] + 71
13 UIKit 0x0001bf2e _UIApplicationHandleEvent + 7576
14 GraphicsServices 0x00ff8992 PurpleEventCallback + 1550
15 CoreFoundation 0x00da0944 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
16 CoreFoundation 0x00d00cf7 __CFRunLoopDoSource1 + 215
17 CoreFoundation 0x00cfdf83 __CFRunLoopRun + 979
18 CoreFoundation 0x00cfd840 CFRunLoopRunSpecific + 208
19 CoreFoundation 0x00cfd761 CFRunLoopRunInMode + 97
20 UIKit 0x000137d2 -[UIApplication _run] + 623
21 UIKit 0x0001fc93 UIApplicationMain + 1160
22 ZebraSDKTest 0x00002549 main + 121
23 ZebraSDKTest 0x000024c5 start + 53
)
最佳答案
看起来您在您的一个 nib 文件中连接到以前存在的 UINavigationController IBOutlet。
从 MainWindow.xib 开始并检查这样的连接。
关于iphone - 简单的应用程序崩溃？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6146775/