Question

我有一个带有多个视图的tabbar，一个带有连接到Core Data的tableview。现在我在另一个项目中再创建一个tableview，我想将它合并到我的第一个项目中。这对我来说并不陌生，我之前已经在另一个项目中完成了这个项目，其中我有三个不同核心数据表的表视图，一切正常。所以我觉得这将是在公园散步。

在我的AppDelage.m和.h中，我已将managedObjectContext的所有代码添加并复制到managedObjectContext2。并制作了新的导航控制器“navigationController2”。

ProtokollList *protokollList = (ProtokollList *)[navigationController2 topViewController];
    // Set its managedObjectContext property to the managed object context 
    protokollList.managedObjectContext2 = self.managedObjectContext2;

    // Get the root view controller; it's in the topViewController property of the navigation controller
    KortKategori *kortKategori = (KortKategori *)[navigationController topViewController];
    // Set its managedObjectContext property to the managed object context 
    kortKategori.managedObjectContext = self.managedObjectContext;

然后在我的ProtokollList.m中，我将managedObjectContext更改为managedObjectContext2。并在MainWindow.nib中建立了必要的连接。

但是当我尝试运行该项目时，我收到此错误消息：

2011-07-24 18:22:58.188 Kortspel[1346:207] Unknown class ProtokollList in Interface Builder file.
2011-07-24 18:22:58.198 Kortspel[1346:207] -[UIViewController setManagedObjectContext2:]: unrecognized selector sent to instance 0x4d13c40
2011-07-24 18:22:58.199 Kortspel[1346:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController setManagedObjectContext2:]: unrecognized selector sent to instance 0x4d13c40'
*** Call stack at first throw:
(
    0   CoreFoundation                      0x00fab5a9 __exceptionPreprocess + 185
    1   libobjc.A.dylib                     0x010ff313 objc_exception_throw + 44
    2   CoreFoundation                      0x00fad0bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
    3   CoreFoundation                      0x00f1c966 ___forwarding___ + 966
    4   CoreFoundation                      0x00f1c522 _CF_forwarding_prep_0 + 50
    5   Kortspel                            0x00001f28 -[KortAppDelegate applicationDidFinishLaunching:] + 709
    6   UIKit                               0x002c4ce2 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1252
    7   UIKit                               0x002c6d88 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 439
    8   UIKit                               0x002d1617 -[UIApplication handleEvent:withNewEvent:] + 1533
    9   UIKit                               0x002c9abf -[UIApplication sendEvent:] + 71
    10  UIKit                               0x002cef2e _UIApplicationHandleEvent + 7576
    11  GraphicsServices                    0x01903992 PurpleEventCallback + 1550
    12  CoreFoundation                      0x00f8c944 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
    13  CoreFoundation                      0x00eeccf7 __CFRunLoopDoSource1 + 215
    14  CoreFoundation                      0x00ee9f83 __CFRunLoopRun + 979
    15  CoreFoundation                      0x00ee9840 CFRunLoopRunSpecific + 208
    16  CoreFoundation                      0x00ee9761 CFRunLoopRunInMode + 97
    17  UIKit                               0x002c67d2 -[UIApplication _run] + 623
    18  UIKit                               0x002d2c93 UIApplicationMain + 1160
    19  Kortspel                            0x00001c40 main + 102
    20  Kortspel                            0x00001bd1 start + 53
)
terminate called after throwing an instance of 'NSException'

我不知道它说它不识别“ProtokollList”类，因为它是在ProtokollList.h中定义的。

有没有人有任何想法？这是启动前的最后一步！

编辑：如果我试图删空：

/*
ProtokollList *protokollList = (ProtokollList *)[navigationController2 topViewController];
    // Set its managedObjectContext property to the managed object context 
    protokollList.managedObjectContext2 = self.managedObjectContext2;
*/

我可以打开项目，但是当我点击ProtokollList-tableview时，我收到这条新的错误信息：

2011-07-25 20:06:56.588 Kortspel[3205:207] Unknown class ProtokollList in Interface Builder file.
2011-07-25 20:07:01.585 Kortspel[3205:207] -[UIViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x590f3f0
2011-07-25 20:07:01.587 Kortspel[3205:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x590f3f0'
*** Call stack at first throw:
(
    0   CoreFoundation                      0x00fb25a9 __exceptionPreprocess + 185
    1   libobjc.A.dylib                     0x01106313 objc_exception_throw + 44
    2   CoreFoundation                      0x00fb40bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
    3   CoreFoundation                      0x00f23966 ___forwarding___ + 966
    4   CoreFoundation                      0x00f23522 _CF_forwarding_prep_0 + 50
    5   UIKit                               0x004882b7 -[UISectionRowData refreshWithSection:tableView:tableViewRowData:] + 1834
    6   UIKit                               0x00485d88 -[UITableViewRowData numberOfRows] + 108
    7   UIKit                               0x00339677 -[UITableView noteNumberOfRowsChanged] + 132
    8   UIKit                               0x00346708 -[UITableView reloadData] + 773
    9   UIKit                               0x00343844 -[UITableView layoutSubviews] + 42
    10  QuartzCore                          0x01f52a5a -[CALayer layoutSublayers] + 181
    11  QuartzCore                          0x01f54ddc CALayerLayoutIfNeeded + 220
    12  QuartzCore                          0x01efa0b4 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 310
    13  QuartzCore                          0x01efb294 _ZN2CA11Transaction6commitEv + 292
    14  QuartzCore                          0x01efb46d _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 99
    15  CoreFoundation                      0x00f9389b __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 27
    16  CoreFoundation                      0x00f286e7 __CFRunLoopDoObservers + 295
    17  CoreFoundation                      0x00ef11d7 __CFRunLoopRun + 1575
    18  CoreFoundation                      0x00ef0840 CFRunLoopRunSpecific + 208
    19  CoreFoundation                      0x00ef0761 CFRunLoopRunInMode + 97
    20  GraphicsServices                    0x019091c4 GSEventRunModal + 217
    21  GraphicsServices                    0x01909289 GSEventRun + 115
    22  UIKit                               0x002d9c93 UIApplicationMain + 1160
    23  Kortspel                            0x00002524 main + 102
    24  Kortspel                            0x000024b5 start + 53
)
terminate called after throwing an instance of 'NSException'

祝你好运， xqtr

Answer 1

编辑：

我理解关键点是关于IB的警告（开始时没有注意到它）......

你能检查一下ProtokollList.h和ProtokollList.m是否有效地分配给你正在构建的目标？（我想是的，否则你会有更多的链接问题，无论如何，这是一个基本的检查。）

如果没问题，那么我只想尝试清理并重建所有。

如果这不能解决问题，那么这可能意味着链接器在最终二进制文件中没有包含ProtokollList.m，因为有些优化（该类可能永远不会在其余代码中引用，只是在Interface Builder中）。解决此问题的方法是将-all_load添加到项目的链接器标志中。

如果这没有帮助，我很伤心，但我没有更多建议......

您正在致电：

    protokollList.managedObjectContext2 = self.managedObjectContext2;

并且managedObjectContext2中找不到名为protokollList的媒体资源。这可以通过以下行来推断：

-[UIViewController setManagedObjectContext2:]: unrecognized selector sent to instance 0x4d13c40

因此，您应该可以在managedObjectContext2中定义protokollList（应该是UIViewController）。

EDIT;

interface ProtokollList : UITableViewController <NSFetchedResultsControllerDelegate> {           
      NSFetchedResultsController *fetchedResultsController2;
      NSManagedObjectContext *managedObjectContext2;
}
@property (nonatomic, retain) NSManagedObjectContext *managedObjectContext2;
@end

将两个tableview合并到带有Core Data的标签栏时出现问题

1 个答案: