macos - Mac 应用程序中的“确定”警报按钮不起作用

Question

单击按钮后，我使用以下代码

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];

从这个 testViewController 中，我使用代码显示警报

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

但是单击此警报的“确定”按钮后。我的警报仍然显示在屏幕上。请帮忙!

Answer 1

使用它作为:

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);

}

希望对您有帮助。