Macos mac应用程序中警报的“确定”按钮不起作用

点击一个按钮，我使用下面的代码

testViewController *myWindowController  = [[testViewController alloc] initWithWindowNibName:@"RecordingsViewController"];

[myWindowController setDelegate:self];
activeModalWindow = [myWindowController window];

[NSApp beginSheet:[myWindowController window]
   modalForWindow:[self window]
    modalDelegate:self
   didEndSelector:@selector(sheetDidEnd:returnCode:contextInfo:) 
      contextInfo:nil];
[NSApp runModalForWindow:[myWindowController window]];

[[myWindowController window] orderOut: self];

在这个testViewController中，我使用以下代码显示一个警报

NSString *theAlertMessage = [NSString stringWithFormat: @"Already added"];
NSRunAlertPanel(@"", theAlertMessage, @"OK", nil, nil);

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但单击此警报的“确定”按钮时。我的警报仍在屏幕上。请帮忙

找到了一个替代方案，它可以完美地工作

NSString *theAlertMessage = [NSString stringWithFormat: @"Already added."];
NSAlert *alert = [[[NSAlert alloc] init] autorelease];
[alert setAlertStyle:NSCriticalAlertStyle];
[alert addButtonWithTitle:@"OK"];
[alert setMessageText:theAlertMessage];

将此选项用作：

NSAlert *alert = [[NSAlert alloc] init];
[alert setAlertStyle:2];
[alert setMessageText:@"Already added"];

    [alert beginSheetModalForWindow:[(AppDelegate *)[[NSApplication sharedApplication] delegate] window]
                   modalDelegate:self

                  didEndSelector:@selector(sheetDidEnd:returnCode:contextInfo:)
                     contextInfo:nil];
 }

 - (void)sheetDidEnd:(NSAlert *)alert
               returnCode:(int)returnCode contextInfo:(void *)contextInfo
{
    NSLog(@"clicked %d button\n", returnCode);

}

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希望它对您有所帮助。

奇怪，这对我很有用，您在调试器控制台中是否有错误/警告消息？能否尝试使用NSRunAlertPanel使用简单框架构建新项目，以验证其在系统中的功能？（排除该问题仅存在于本项目中的可能性）