cocoa - 如何在 Mavericks 中打开 NSSheet？

Question

在 Mavericks 中，打开和关闭 NSSheets 的方法已更改。为了让它变得更难，Release Notes与当前文档不匹配(见下文)。

我正在尝试这样做:

MainSheetController(NSWindowController):

-(IBAction)callSheet:(id)sender {
    [sheetController openSheet];
}

SheetController(NSObject):

 (void)openSheet {  
    [[NSBundle mainBundle] loadNibNamed:sheetName owner:self topLevelObjects:nil];
    NSLog(@"1");
    [self.mainWindowController.window beginSheet:self.sheet completionHandler:nil];
    NSLog(@"2");    
}

我到达 2，没有错误或警告，但没有工作表..

当前文档:

#if NS_BLOCKS_AVAILABLE
- (void)beginSheet:(NSWindow *)sheetWindow completionHandler:(void (^)(NSModalResponse returnCode))handler NS_AVAILABLE_MAC(10_9);
- (void)beginCriticalSheet:(NSWindow *)sheetWindow completionHandler:(void (^)(NSModalResponse returnCode))handler NS_AVAILABLE_MAC(10_9);
#endif

Answer 1

- (IBAction)userButtonPressed:(id)sender {

    UserLoginWindowController * wc = [UserLoginWindowController new];
    // we keep a reference, so the WC doesn't deallocate
    self.modalWindowController = wc;

    [[self window] beginSheet:[wc window] completionHandler:^(NSModalResponse returnCode) {
        self.modalWindowController = nil;
    }];

}

在 UserLoginWindowController 中

- (IBAction)cancelButtonPressed:(id)sender {

    [[[self window] sheetParent] endSheet:[self window] returnCode:NSModalResponseCancel];

}