为什么我在Tab Bar Tap上出现Build Error？

时间：2011-07-03 16:59:47

标签： objective-c ios ios4 uitabbar build-error

我正在创建一个iPhone iOS应用程序。我在标签栏控制器中有3个标签。当我点击iOS模拟器中标签栏控制器上的第三个标签时，iOS模拟器会消失，我会看到带有绿色高亮区的main.m文件：

int retVal = UIApplicationMain(argc, argv, nil, nil);

构建错误表明：线程1：编程接收信号：SIGABRT

如果我查看屏幕底部的构建输出窗口，我会看到以下文字：

GNU gdb 6.3.50-20050815 (Apple version gdb-1518) (Sat Feb 12 02:52:12 UTC 2011)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin".Attaching to process 4283.
**2011-07-03 12:45:37.114 Cypher Bot[4283:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x4e1b190> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key portraitView.'
*** Call stack at first throw:
(
        0   CoreFoundation                      0x00dce5a9 __exceptionPreprocess + 185
        1   libobjc.A.dylib                     0x00f22313 objc_exception_throw + 44
        2   CoreFoundation                      0x00dce4e1 -[NSException raise] + 17
        3   Foundation                          0x007a0677 _NSSetUsingKeyValueSetter + 135
        4   Foundation                          0x007a05e5 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 285
        5   UIKit                               0x0021c30c -[UIRuntimeOutletConnection connect] + 112
        6   CoreFoundation                      0x00d448cf -[NSArray makeObjectsPerformSelector:] + 239
        7   UIKit                               0x0021ad23 -[UINib instantiateWithOwner:options:] + 1041
        8   UIKit                               0x0021cab7 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 168
        9   UIKit                               0x000d2628 -[UIViewController _loadViewFromNibNamed:bundle:] + 70
        10  UIKit                               0x000d0134 -[UIViewController loadView] + 120
        11  UIKit                               0x000d000e -[UIViewController view] + 56
        12  UIKit                               0x000e2f54 -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 120
        13  UIKit                               0x000e1aaa -[UITabBarController transitionFromViewController:toViewController:] + 64
        14  UIKit                               0x000e38a2 -[UITabBarController _setSelectedViewController:] + 263
        15  UIKit                               0x000e3711 -[UITabBarController _tabBarItemClicked:] + 352
        16  UIKit                               0x000204fd -[UIApplication sendAction:to:from:forEvent:] + 119
        17  UIKit                               0x00222ce6 -[UITabBar _sendAction:withEvent:] + 422
        18  UIKit                               0x000204fd -[UIApplication sendAction:to:from:forEvent:] + 119
        19  UIKit                               0x000b0799 -[UIControl sendAction:to:forEvent:] + 67
        20  UIKit                               0x000b2c2b -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
        21  UIKit                               0x000b0750 -[UIControl sendActionsForControlEvents:] + 49
        22  UIKit                               0x000204fd -[UIApplication sendAction:to:from:forEvent:] + 119
        23  UIKit                               0x000b0799 -[UIControl sendAction:to:forEvent:] + 67
        24  UIKit                               0x000b2c2b -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
        25  UIKit                               0x000b17d8 -[UIControl touchesEnded:withEvent:] + 458
        26  UIKit                               0x00044ded -[UIWindow _sendTouchesForEvent:] + 567
        27  UIKit                               0x00025c37 -[UIApplication sendEvent:] + 447
        28  UIKit                               0x0002af2e _UIApplicationHandleEvent + 7576
        29  GraphicsServices                    0x01007992 PurpleEventCallback + 1550
        30  CoreFoundation                      0x00daf944 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
        31  CoreFoundation                      0x00d0fcf7 __CFRunLoopDoSource1 + 215
        32  CoreFoundation                      0x00d0cf83 __CFRunLoopRun + 979
        33  CoreFoundation                      0x00d0c840 CFRunLoopRunSpecific + 208
        34  CoreFoundation                      0x00d0c761 CFRunLoopRunInMode + 97
        35  GraphicsServices                    0x010061c4 GSEventRunModal + 217
        36  GraphicsServices                    0x01006289 GSEventRun + 115
        37  UIKit                               0x0002ec93 UIApplicationMain + 1160
        38  Cypher Bot                          0x00002889 main + 121
        39  Cypher Bot                          0x00002805 start + 53
        40  ???                                 0x00000001 0x0 + 1
)
terminate called after throwing an instance of 'NSException'
sharedlibrary apply-load-rules all
Current language:  auto; currently objective-c
(gdb)**
>

我在此之前对第三个视图控制器所做的更改是：

  1. 添加横向支持
  2. 添加内存警告事件
  3. 添加一项功能，允许您打开短信应用程序（我删除了该功能，然后我运行了该项目，但没有发生任何事情）

    4. 编辑： 我已经包含了头文件：

    #import <UIKit/UIKit.h>


@interface ThirdViewController : UIViewController {
    IBOutlet UIView *landscapeView;
    IBOutlet UIView *portraitView;

}

@property (nonatomic, retain) IBOutlet UIView *landscapeView;

@property (nonatomic, retain) IBOutlet UIView *portraitView;
@end

    @properties与@synthesize一起使用，项目中没有错误或警告。

    编辑2：我删除了与portraitView和landscapeView相关的所有内容，现在当我运行它时，我点击更多，我得到以下内容：

    **Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Could not load NIB in bundle: 'NSBundle </Users/Spencer/Library/Application Support/iPhone Simulator/4.3.2/Applications/1E0A4C15-2143-442D-A8FC-4AE36CFC90E4/Cypher Bot.app> (loaded)' with name 'ThirdViewController.xib''**

    我做错了什么？为什么我无法点击第三个标签？

    任何帮助表示赞赏！谢谢！

3 个答案:

答案 0 :(得分：4)

您的nib文件似乎尝试将某些内容绑定到UIViewController上名为portraitView的插座，但UIViewController没有这样的属性。我猜你需要进入IB并将该视图控制器上的类更改为应用程序中应该使用的任何自定义UIViewController子类。

答案 1 :(得分：1)

IB Snapshot

这是我在Interface Builder中的观点。 “文件的所有者”应该设置为相应的视图控制器，在你的情况下，它应该在这里说“ThirdViewController”。确保链接到正确的视图控制器。

同时检查将此视图控制器添加到选项卡栏的代码。您是在初始化UIViewController还是在第三个ViewController中？确保它是一个ThirdViewController。

答案 2 :(得分：0)

在将界面构建器中的视图拖动到该变量之后，您可能已更改了代码中变量名的名称，从而导致此类错误。要解决此问题，您必须再将其拖回来，您可能在该属性的界面构建器中有一个解释标记。

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