以编程方式执行故事板Segue

Question

我是大家,我正在为新的应用程序开发登录和密码界面,我想有条件地执行一个segue,只有当密码和登录都没问题时.我在故事板中使用"推送"样式和"loginMainIdentifier"创建了一个Segue.实现文件夹的编写如下:

    - (IBAction)pushValidateButton:(id)sender {

    if([loginText.text isEqualToString:@""] || [passwordText.text isEqualToString:@""] )
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Identification" message:@"Veuillez completer l'ensemble des cases SVP" delegate:self cancelButtonTitle:@"Revenir" otherButtonTitles:nil];
        alert.alertViewStyle = UIAlertViewStyleDefault;
        [alert show];
    }

    if(![loginText.text isEqualToString:@""] && ![passwordText.text isEqualToString:@""])
    {
    //creation of the request
        NSMutableString *string = [[NSMutableString alloc] initWithCapacity:100];
        NSString *string01 = @"http://89.82.227.112/Vico/login.php?l=&m="; 


        [string appendFormat:string01];
        NSString *string02 = loginText.text;
        NSString *string03 = passwordText.text;

        [string insertString:string03 atIndex:41];
        [string insertString:string02 atIndex:38];

        NSURLRequest *request01=[NSURLRequest requestWithURL:[NSURL URLWithString:string]cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];

    //create the connection and start loading data

        NSURLConnection *connection01 = [[NSURLConnection alloc] initWithRequest:request01 delegate:self];
        if(connection01)
        {
        //Create NSMutableData to receive data
        //receiveddata is an instance declared elsewhere
        receivedData = [NSMutableData data];
        }
    }
    [self performSegueWithIdentifier:@"loginMainSegue" sender:self];
}

我不明白为什么它[self performSegueWithIdentifier:@"loginMainSegue" sender:self]在代码结束时不起作用.

是否有人知道只有在登录和文本填写时才能执行segue所缺少的内容.

谢谢

胜利者

Answer 1

检查名称拼写正确(你在上面写道loginMainIdentifier,然后loginMainSegue代码).

还要检查这个segue是否从整个 viewController 连接到目标viewController.