objective-c - 无法从类 NSWindow 的对象创建 BOOL

Question

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已关闭 10 年前。

当我从 NIB 加载窗口时，我看到此错误。该错误出现在 Apple 代码的深处。我的加载代码全部正确执行，并且在运行时所有 socket 都设置正确。

Cannot create BOOL from object <NSWindow: 0x7f883b44f770> of class NSWindow

这是正在调用的代码

- (void)awakeFromNib{    
    [self showLoginSheet];
}

- (void)showLoginSheet
// User has asked to see the custom display. Display it.
{
    if (!self.loginSheet)
        [NSBundle loadNibNamed:@"LoginSheet" owner:self];
        //Check the myCustomSheet instance variable to make sure the custom sheet does not already exist

    [NSApp beginSheet: self.loginSheet
       modalForWindow: [[NSApp delegate] window]
        modalDelegate: self
       didEndSelector: NULL
          contextInfo: NULL];
}

堆栈跟踪是

2012-07-21 21:09:57.575 MingleLookBooks[15934:503] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Cannot create BOOL from object <NSWindow: 0x7f883b44f770> of class NSWindow'
*** First throw call stack:
(
    0   CoreFoundation                      0x00007fff91305f56 __exceptionPreprocess + 198
    1   libobjc.A.dylib                     0x00007fff874b9d5e objc_exception_throw + 43
    2   CoreFoundation                      0x00007fff91305d8a +[NSException raise:format:arguments:] + 106
    3   AppKit                              0x00007fff9038a394 _NSBoolFromValue + 421
    4   AppKit                              0x00007fff903b1c5a -[NSEditableBinder hiddenState] + 83
    5   AppKit                              0x00007fff903b1bdf -[NSEditableBinder _hiddenStateWithMode:] + 41
    6   AppKit                              0x00007fff90389eaa -[NSEditableBinder _setStatesImmediatelyInObject:mode:triggerRedisplay:] + 579
    7   AppKit                              0x00007fff90389c60 -[NSEditableBinder _observeValueForKeyPath:ofObject:context:] + 123
    8   AppKit                              0x00007fff901a1643 -[NSObject(NSKeyValueBindingCreation) bind:toObject:withKeyPath:options:] + 591
    9   AppKit                              0x00007fff9019a959 -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1079
    10  AppKit                              0x00007fff90190f73 loadNib + 322
    11  AppKit                              0x00007fff90190470 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 217
    12  AppKit                              0x00007fff9019038b +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] + 141
    13  AppKit                              0x00007fff901902ce +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 364
    14  MingleLookBooks                     0x000000010ef0917a -[AppController showLoginSheet] + 138
    15  MingleLookBooks                     0x000000010ef08ffb -[AppController awakeFromNib] + 43
    16  CoreFoundation                      0x00007fff912fcfb1 -[NSObject performSelector:] + 49
    17  CoreFoundation                      0x00007fff912fcf32 -[NSSet makeObjectsPerformSelector:] + 274
    18  AppKit                              0x00007fff9019a9ff -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1245
    19  AppKit                              0x00007fff90190f73 loadNib + 322
    20  AppKit                              0x00007fff90190470 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 217
    21  AppKit                              0x00007fff9019038b +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] + 141
    22  AppKit                              0x00007fff901902ce +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 364
    23  AppKit                              0x00007fff9040106f NSApplicationMain + 398
    24  MingleLookBooks                     0x000000010ef08f32 main + 34
    25  MingleLookBooks                     0x000000010ef08f04 start + 52
)
terminate called throwing an exception(lldb) 

正如您从堆栈跟踪中看到的，这似乎与我的代码无关。我究竟做错了什么？我不知道，类似问题的其他答案也没有真正的帮助。

Answer 1

看起来您的 XIB 中的绑定(bind)设置不正确。