【发布时间】：2014-08-06 10:35:00
【问题描述】：
所以我是 iOS 编程新手，但遇到了问题。
我创建了一个新的视图控制器，然后单击复选标记自动为其创建一个 .xib 文件。在 xib 文件中，我放了一个标签，我想淡入。所以我尝试将它链接到我的自定义视图控制器，并不断崩溃，因为“这个类不符合键 login1 的键值编码”。 Login1 是我导入的 UILabel 的名称。这是 RootView 的头文件：
@interface RootViewController : UIViewController {
PlayerStatViewController *playerStatViewController;
NSString *viewName;
}
@property (weak, nonatomic) IBOutlet UILabel *login1;
@property (nonatomic, retain) PlayerStatViewController *playerStatViewController;
@property (nonatomic, retain) NSString *viewName;
-(IBAction)switchPage:(id)sender:(NSString *)toSwitch;
-(void) animateButton;
@end
还有 .m 文件： #import "RootViewController.h" #import "FileUtils.h"
@interface RootViewController ()
@end
@implementation RootViewController
@synthesize playerStatViewController;
@synthesize viewName;
@synthesize login1;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
}
self.viewName = @"Boot";
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
NSString* fpath = [NSString stringWithFormat:@"%@%@", getDefPath(), @"/config.txt"];
self.login1.text = loadfile(@"serverName", fpath);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
-(IBAction)switchPage:(id)sender :(NSString *)toSwitch {
if([toSwitch isEqualToString:(@"PlayerStat")]) {
if(self.playerStatViewController == nil) {
PlayerStatViewController *playerStatView = [[PlayerStatViewController alloc]
initWithNibName:(@"PlayerStat") bundle:[NSBundle mainBundle]];
self.playerStatViewController = playerStatView;
}
[self.navigationController pushViewController:self.playerStatViewController animated:YES];
}else if([toSwitch isEqualToString:(@"Boot")]) {
[self.navigationController pushViewController:self animated:YES];
}
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[self performSelector:@selector(animateButton) withObject:nil afterDelay:0.1f];
}
- (void)animateButton {
self.login1.alpha = 0;
[UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionCurveEaseIn
animations:^{ self.login1.alpha = 1;}
completion:nil];
}
@end
我如何加载 Xib（如果重要的话）：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
RootViewController *viewController = [[RootViewController alloc] initWithNibName:@"RootViewController" bundle:nil];
[self.window setRootViewController:viewController];
[window makeKeyAndVisible];
return YES;
}
项目仅针对 iPhone 构建。 在 Xib 中，是的，自定义视图控制器被设置为文件所有者。没有错误指向的值（检查管理器中的感叹号）。
编辑： 崩溃日志：
2014-08-06 06:02:12.887 TrinityApi[5761:60b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIApplication 0x8c781d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key login1.'
*** First throw call stack:
(
0 CoreFoundation 0x017ee1e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x0156d8e5 objc_exception_throw + 44
2 CoreFoundation 0x0187dfe1 -[NSException raise] + 17
3 Foundation 0x0122dd9e -[NSObject(NSKeyValueCoding) setValue:forUndefinedKey:] + 282
4 Foundation 0x0119a1d7 _NSSetUsingKeyValueSetter + 88
5 Foundation 0x01199731 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 267
6 Foundation 0x011fbb0a -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 412
7 UIKit 0x004e41f4 -[UIRuntimeOutletConnection connect] + 106
8 libobjc.A.dylib 0x0157f7de -[NSObject performSelector:] + 62
9 CoreFoundation 0x017e976a -[NSArray makeObjectsPerformSelector:] + 314
10 UIKit 0x004e2d4d -[UINib instantiateWithOwner:options:] + 1417
11 UIKit 0x004e4ada -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 165
12 UIKit 0x0022d61b -[UIApplication _loadMainNibFileNamed:bundle:] + 58
13 UIKit 0x0022d949 -[UIApplication _loadMainInterfaceFile] + 245
14 UIKit 0x0022c54e -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 543
15 UIKit 0x00240f92 -[UIApplication handleEvent:withNewEvent:] + 3517
16 UIKit 0x00241555 -[UIApplication sendEvent:] + 85
17 UIKit 0x0022e250 _UIApplicationHandleEvent + 683
18 GraphicsServices 0x037e3f02 _PurpleEventCallback + 776
19 GraphicsServices 0x037e3a0d PurpleEventCallback + 46
20 CoreFoundation 0x01769ca5 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
21 CoreFoundation 0x017699db __CFRunLoopDoSource1 + 523
22 CoreFoundation 0x0179468c __CFRunLoopRun + 2156
23 CoreFoundation 0x017939d3 CFRunLoopRunSpecific + 467
24 CoreFoundation 0x017937eb CFRunLoopRunInMode + 123
25 UIKit 0x0022bd9c -[UIApplication _run] + 840
26 UIKit 0x0022df9b UIApplicationMain + 1225
27 TrinityApi 0x00002a9d main + 141
28 libdyld.dylib 0x01e35701 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
编辑：只是随机开始工作
【问题讨论】：
-
这可能有助于显示崩溃发生的位置。要确定确切的行或位置，建议您为异常添加一个断点，并在发生崩溃时查看它在调试器中停止的位置。
-
能否提供崩溃日志
-
编辑有错误日志。并且 volker 它在特定行崩溃： return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
-
检查您的用户定义的运行时属性。如果您更改了控制类，那些（缺失的）属性可能是问题所在。
标签： ios objective-c nsunknownkeyexception