查看将不接受第一响应者状态

Question

我正在以编程方式创建一个新窗口和视图。我需要视图接受First Responder状态。无论出于何种原因，它都不是。

我正在上这所旧学校，因为我希望我的应用程序与旧版本的OSX兼容。这就是我所拥有的：

- (IBAction)startShow:(id)sender {

    // Capture the main display
    if (CGDisplayCapture( kCGDirectMainDisplay ) != kCGErrorSuccess) {
        NSLog( @"Couldn't capture the main display!" );
    }

    // Get the shielding window level
    windowLevel = CGShieldingWindowLevel();

    // Get the screen rect of our main display
    screenRect = [[NSScreen mainScreen] frame];

    // Put up a new window
    displayWindow = [[ShowWindow alloc] initWithContentRect:screenRect
                                             styleMask:NSBorderlessWindowMask
                                               backing:NSBackingStoreBuffered
                                                 defer:NO screen:[NSScreen mainScreen]];
    [displayWindow setBackgroundColor:[NSColor blackColor]];

    [displayWindow setLevel:windowLevel];
    [displayWindow makeKeyAndOrderFront:nil];

    // Load show window with options from settings window. 
    [displayWindow loadOptions:screenRect];

}

为了澄清，displayWindow是ShowWindow的一个实例，它是NSWindow的子类。在我的ShowWindow类中，我正在执行以下操作：

  - (BOOL)canBecomeKeyWindow
  {
      return YES;
  }    

  - (void) loadOptions:(NSRect)screenRect {


    // Create custom view to hold text fields
    view = [[ShowView alloc] initWithFrame: screenRect];   
    [self setContentView:view];

    // Track Title Text Field Initialize
    textField = [[NSTextField alloc] initWithFrame:NSMakeRect(0, screenRect.size.height / 4, screenRect.size.width, 350)];
    [textField setStringValue:@"My Label"];
    [textField setBezeled:NO];
    [textField setDrawsBackground:NO];
    [textField setEditable:NO];
    [textField setSelectable:NO];
    [textField setTextColor:[NSColor whiteColor]];
    [textField setFont:[NSFont fontWithName:@"Helvetica" size:92]];
    [textField setAlignment:NSCenterTextAlignment];

    // Add track title text field to main view. 
    [view addSubview:textField];

    // Make the view first responder
    [self makeFirstResponder:view];

}

view是ShowView的一个实例，它是NSView的子类。最后但并非最不重要的是这是我在ShowView中发生的事情：

// Next four methods set main view as first responder to accept keyboard input
- (BOOL)acceptsFirstResponder
{
    NSLog(@"I accepted being a first responder! Yea!");
    return YES;
}

- (BOOL)resignFirstResponder
{
    [self setNeedsDisplay:YES];
    return YES;
}

- (BOOL)becomeFirstResponder
{
    [self setNeedsDisplay:YES];
    return YES;
}

- (void)insertText:(NSString *)input
{ 

}