NSWindowController showWindow：nil什麼都不做

Question

和標題一樣，[myWindowController showWindow:nil]不起作用。這裏有您需要知道的一些事實：

• 我的窗口控制：KRAuthenticationWindowController
• 界面生成文件：AuthenticationWindow.xib
• 文件的所有者是KRAuthenticationWindowController
• window出口連接到窗口
• 窗口的delegate連接到文件的所有者
• 窗口的Visible at launch未選中
• 窗口的Release when closed也選中

我的代碼如下介紹：

// KRApplicationDelegate.m 

- (void)applicationDidFinishLaunching:(NSNotification *)notification { 
    NSLog(@"%s",__PRETTY_FUNCTION__); 
    KRAuthenticationWindowController *authWindowController = [[KRAuthenticationWindowController alloc] init]; 
    [authWindowController showWindow:nil]; 
    [[authWindowController window] makeKeyAndOrderFront:nil]; 
} 

// KRAuthenticationWindowController.m 

- (id)init { 
    self = [super initWithWindowNibName:@"AuthenticationWindow"]; 
    if(!self) return nil; 
    NSLog(@"%s",__PRETTY_FUNCTION__); 
    return self; 
} 

- (void)loadWindow { 
    [super loadWindow]; 
    [self.window setBackgroundColor:[NSColor colorWithDeviceWhite:0.73 alpha:1]]; 
    NSLog(@"%s",__PRETTY_FUNCTION__); 
} 

- (void)windowDidLoad { 
    [super windowDidLoad]; 
    NSLog(@"%s",__PRETTY_FUNCTION__); 
} 

- (void)showWindow:(id)sender { 
    [super showWindow:sender]; 
    NSLog(@"%@",self.window); 
    NSLog(@"%s",__PRETTY_FUNCTION__); 
} 

我的控制檯輸出：

2013-02-24 16:21:45.420 Application[3105:303] -[KRApplicationDelegate applicationDidFinishLaunching:] 
2013-02-24 16:21:45.421 Application[3105:303] -[KRAuthenticationWindowController init] 
2013-02-24 16:21:45.428 Application[3105:303] -[KRAuthenticationWindowController loadWindow] 
2013-02-24 16:21:45.428 Application[3105:303] -[KRAuthenticationWindowController windowDidLoad] 
2013-02-24 16:21:45.556 Application[3105:303] <NSWindow: 0x10016e860> 
2013-02-24 16:21:45.556 Application[3105:303] -[KRAuthenticationWindowController showWindow:] 

我想我只是缺少一些重要的東西。任何幫助，將不勝感激。

Answer 1

嘗試將authWindowController轉換爲實例變量。目前，它是一個局部變量。當局部變量消失時，窗口控制器可能會被釋放，窗口也會被釋放，所以它永遠不會被顯示。