Mac 开发弹窗NSAlert的使用

弹窗出现在中间

NSAlert *alert = [[NSAlert alloc] init];

    

    [alert setMessageText:@"title"];

    

    [alert setInformativeText:@"msg"];

    

    [alert addButtonWithTitle:@"ok"];

    

    [alert addButtonWithTitle:@"cancel"];

    

    [alert addButtonWithTitle:@"abort"];

    

    [alert setAlertStyle:NSAlertStyleWarning];

    NSUInteger action = [alert runModal];

    //响应window的按钮事件

    if(action == NSAlertFirstButtonReturn) //1000

        

    {

        NSLog(@"OK");

        

    }

    else if(action == NSAlertSecondButtonReturn )//1001

    {

        

        NSLog(@"Cancel");

        

    }

    else if(action == NSAlertThirdButtonReturn)//1002

        

    {

        

        NSLog(@"Abort");

 

    }

 

弹窗出现在窗口上方

NSAlert *alert = [[NSAlert alloc] init];

    alert.alertStyle = NSAlertStyleWarning;

    [alert addButtonWithTitle:@"确定"];

    [alert addButtonWithTitle:@"取消"];

    

    alert.messageText = @"title";

    alert.informativeText = @"msg";

    

    [alert beginSheetModalForWindow:[NSApplication sharedApplication].keyWindow completionHandler:^(NSModalResponse returnCode) {

        if (returnCode == NSAlertFirstButtonReturn) {

            NSLog(@"确定");

        } else if (returnCode == NSAlertSecondButtonReturn) {

            NSLog(@"取消");

        } else {

            NSLog(@"else");

        }

    }];