我正在尝试扩展我的iPhone-Application for iPad,但现在我的头脑出现以下错误
[MasterViewController topViewController]: unrecognized selector sent to instance
我研究了关于类似问题的所有帖子。它们都不符合我的情况。因为我从一个完善的教程中复制了代码,所以我确信代码必须是正确的。 请阅读以下内容:
// TAB BAR
UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;
// Override point for customization after application launch.
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad)
{
NSLog(@"I'm an iPad");
// Set up SPLIT VIEW
UISplitViewController *splitViewController = [[tabBarController viewControllers] objectAtIndex:0];
// Set up splitted MASTER view
UINavigationController *accountsMasterTVCnav = [splitViewController.viewControllers objectAtIndex:0];
splitViewController.delegate = (id)accountsMasterTVCnav.topViewController;
MasterViewController *accountsTVC = [[accountsMasterTVCnav viewControllers] objectAtIndex:0];
accountsTVC.managedObjectContext = self.managedObjectContext;
// Set up Split View DETAIL view
UINavigationController *accountsVCnav = [splitViewController.viewControllers objectAtIndex:1];
AccountsVC *accountsVC = [accountsVCnav.viewControllers objectAtIndex:0];
}
这应该只是第一个拆分视图。 iPhone版本使用4个tableviews,这些都应该在iPad版本中分割显示。 如何以简单的方式解决这个问题?
任何帮助都将受到高度赞赏......提前致谢!
EDIT1:
我更新了Master和Detail控制器中的委托指针。结果仍然相同((( 添加MasterVieWController.h内容......
#import <UIKit/UIKit.h>
#import "Accounts.h"
#import "AccountsMasterDelegate.h"
#import "AccountsDetailDelegate.h"
@interface MasterViewController : UITableViewController <NSFetchedResultsControllerDelegate, UISearchBarDelegate, UISearchDisplayDelegate, AccountsDetailDelegate>
@property (strong,nonatomic) NSMutableArray *filteredAccountsArray;
@property IBOutlet UISearchBar *accountsSearchBar;
@property (nonatomic, weak) id <AccountsMasterDelegate> delegate;
@property (nonatomic, strong) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain) NSFetchedResultsController *fetchedResultsController;
@property (strong, nonatomic) Accounts *selectedAccount;
@end
低于完整错误...
2014-05-24 13:41:02.114 Accounts[35652:60b] -[MasterViewController topViewController]: unrecognized selector sent to instance 0x10c187d50
2014-05-24 13:41:02.117 Accounts[35652:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MasterViewController topViewController]: unrecognized selector sent to instance 0x10c187d50'
*** First throw call stack:
(
0 CoreFoundation 0x0000000102d85495 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x00000001029ef99e objc_exception_throw + 43
2 CoreFoundation 0x0000000102e1665d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x0000000102d76d8d ___forwarding___ + 973
4 CoreFoundation 0x0000000102d76938 _CF_forwarding_prep_0 + 120
5 Accounts 0x000000010001c1de -[AppDelegate application:didFinishLaunchingWithOptions:] + 2142
6 UIKit 0x0000000100ff53d9 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 264
7 UIKit 0x0000000100ff5be1 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1605
8 UIKit 0x0000000100ff9a0c -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 660
9 UIKit 0x000000010100ad4c -[UIApplication handleEvent:withNewEvent:] + 3189
10 UIKit 0x000000010100b216 -[UIApplication sendEvent:] + 79
11 UIKit 0x0000000100ffb086 _UIApplicationHandleEvent + 578
12 GraphicsServices 0x00000001033fb71a _PurpleEventCallback + 762
13 GraphicsServices 0x00000001033fb1e1 PurpleEventCallback + 35
14 CoreFoundation 0x0000000102d07679 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
15 CoreFoundation 0x0000000102d0744e __CFRunLoopDoSource1 + 478
16 CoreFoundation 0x0000000102d30903 __CFRunLoopRun + 1939
17 CoreFoundation 0x0000000102d2fd83 CFRunLoopRunSpecific + 467
18 UIKit 0x0000000100ff92e1 -[UIApplication _run] + 609
19 UIKit 0x0000000100ffae33 UIApplicationMain + 1010
20 Accounts 0x0000000100013793 main + 115
21 libdyld.dylib 0x0000000103f3d5fd start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
如果需要任何其他信息,请告诉我。 感谢您的帮助!
@Matteo更新:
// Set up splitted MASTER view
MasterViewController *mvc = [splitViewController.viewControllers objectAtIndex:0];
UINavigationController *accountsMasterTVCnav = mvc.navigationController;
// UINavigationController *accountsMasterTVCnav = [splitViewController.viewControllers objectAtIndex:0];
splitViewController.delegate = (id)accountsMasterTVCnav.topViewController;
// MasterViewController *accountsTVC = [[accountsMasterTVCnav viewControllers] objectAtIndex:0];
mvc.managedObjectContext = self.managedObjectContext;
答案 0 :(得分:1)
注意:很酷的阅读所有帖子,了解可能会发生什么。但在这种特殊情况下,情况是更新3。
这是问题所在:
(id)accountsMasterTVCnav.topViewController
首先,(id)
演员不需要。
其次,错误表明您的accountsMasterTVCnav
类型为MasterViewController
且它没有选择器(在您的情况下是@property
),称为{{1} }}
所以问问自己:
topViewController
是该类的类型?<强>更新强>
我在看你的代码:
accountsMasterTVCnav
UINavigationController *accountsMasterTVCnav = [splitViewController.viewControllers objectAtIndex:0];
splitViewController.delegate = (id)accountsMasterTVCnav.topViewController;
是topViewController
的属性,但是当你这样做时:
UINavigationController
您猜测返回的实例属于UINavigationController *accountsMasterTVCnav = [splitViewController.viewControllers objectAtIndex:0];
类型,而是UINavigationController
类型。
因此MasterViewController
splitViewController.viewControllers
实例不在索引0 。您必须设置正确的索引。我不了解你的UINavigationController
。
更新2:
在下面的评论中观看您的屏幕截图,请尝试以下操作:
viewController hierarchy
另一件事。您的代码位于MasterViewController *masterViewController = [splitViewController.viewControllers objectAtIndex:0];
UINavigationController *accountsMasterTVCnav = masterViewController.navigationController;
?那你为什么需要访问topViewController呢?它肯定是第一个视图控制器,所以MasterViewController。
因此,如果返回的实例是applicationDidFinishLaunching
,您只需执行以下操作:
MasterViewController
更新3:
审核您的项目,并进行一些测试我猜在故事板中可能存在错误。这是其中一个原因,因为我不使用故事板。
在您的代码中,您有:
splitViewController.delegate = [splitViewController.viewControllers objectAtIndex:0];
但是发生了什么需要4 TabBarController
SplitViewController
UINavigationController *
MasterViewController
UINavigationController
UINavigationController *
UINavigationController *
UINavigationController *
(参见上面的*****):
出于这个原因:
NavigationController
您正在获取UISplitViewController *splitViewController = [[tabBarController viewControllers] objectAtIndex:0];
个实例.. (第一个*)并且正在执行:
UINavigationController
显然你直接获得了[splitViewController.viewControllers objectAtIndex:0];
。
因此,当你这样做时:
MasterViewController
它崩溃了......因为导航堆栈中只有[splitViewController.viewControllers objectAtIndex:1];
。
您已将masterViewController
正确关联到viewControllers
。
我认为这是一个Apple漏洞......非常荒谬。
我的建议是用NIB或代码重写所有内容..我知道这很贵......还可以在网上看看这个问题。
享受!