Question

我有一个基于Windows的iPhone应用程序。我有标签，我从其中一个标签中切换另一个页面并在该页面的webview中显示facebook。我将无法识别的选择器发送到实例错误。

这是我尝试切换的代码：

-(IBAction)goFacebookPage:(id)sender
{
    FacebookPage *fbController = [[FacebookPage alloc] initWithNibName:@"FacebookPage" bundle:nil];
    fbController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
    [self presentModalViewController:fbController animated:YES];
    [fbController release];
}

回溯是：

2012-03-02 15:29:13.797 TPFApp[2344:b903] -[UIViewController goFacebookPage:]: unrecognized selector sent to instance 0x6818540
2012-03-02 15:29:13.868 TPFApp[2344:b903] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController goFacebookPage:]: unrecognized selector sent to instance 0x6818540'
*** Call stack at first throw:
(
    0   CoreFoundation                      0x00dc25a9 __exceptionPreprocess + 185
    1   libobjc.A.dylib                     0x00f16313 objc_exception_throw + 44
    2   CoreFoundation                      0x00dc40bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
    3   CoreFoundation                      0x00d33966 ___forwarding___ + 966
    4   CoreFoundation                      0x00d33522 _CF_forwarding_prep_0 + 50
    5   UIKit                               0x000144fd -[UIApplication sendAction:to:from:forEvent:] + 119
    6   UIKit                               0x000a4799 -[UIControl sendAction:to:forEvent:] + 67
    7   UIKit                               0x000a6c2b -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 527
    8   UIKit                               0x000a57d8 -[UIControl touchesEnded:withEvent:] + 458
    9   UIKit                               0x00038ded -[UIWindow _sendTouchesForEvent:] + 567
    10  UIKit                               0x00019c37 -[UIApplication sendEvent:] + 447
    11  UIKit                               0x0001ef2e _UIApplicationHandleEvent + 7576
    12  GraphicsServices                    0x00ffb992 PurpleEventCallback + 1550
    13  CoreFoundation                      0x00da3944 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
    14  CoreFoundation                      0x00d03cf7 __CFRunLoopDoSource1 + 215
    15  CoreFoundation                      0x00d00f83 __CFRunLoopRun + 979
    16  CoreFoundation                      0x00d00840 CFRunLoopRunSpecific + 208
    17  CoreFoundation                      0x00d00761 CFRunLoopRunInMode + 97
    18  GraphicsServices                    0x00ffa1c4 GSEventRunModal + 217
    19  GraphicsServices                    0x00ffa289 GSEventRun + 115
    20  UIKit                               0x00022c93 UIApplicationMain + 1160
    21  TPFApp                              0x00001e19 main + 121
    22  TPFApp                              0x00001d95 start + 53
)
terminate called throwing an exceptionCurrent language:  auto; currently objective-c

错误消息：

-[UIViewController goFacebookPage:]: unrecognized selector sent to instance 0x6894210 2012-03-01 21:10:53.218 TPFApp[1750:b903] 
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController goFacebookPage:]: unrecognized selector sent to instance 0x6894210'

由于

Answer 1

错误告诉您，在消息中命名的选择器（函数）被“发送”到错误类型的对象。

如果您甚至包含了最新的附加信息（例如完整信息的副本），我们将能够提供更多建议。

Answer 2

找到您正在呼叫的课程 goFacebookPage: ，并确保该课程与您从中呼叫的课程相同。

Answer 3

在Interface Builder中，您已将控件（例如UIButton？）连接到View Controller。但是，您尚未将View Controller的类型设置为自定义视图控制器，而是将其连接到UIViewController的默认实例。

要解决此问题，您需要将View Controller的类型更改为自定义视图控制器的类（您定义goFacebookPage:方法的类。您可以在Interface Builder中的Identity Inspector中执行此操作 - 见这里：

enter image description here

在目标c中的页面之间切换时，无法识别的选择器发送到实例错误

回溯是：

错误消息：

3 个答案: