Question

我是大家，我正在为新应用程序开发登录和密码界面，我想有条件地执行segue，只有当密码和登录都可以时。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];
}

我不明白为什么它在代码末尾不能与[self performSegueWithIdentifier:@"loginMainSegue" sender:self]一起使用。

只有在填写了登录和文本时，才有人知道为了执行segue所缺少的内容。

谢谢

维克多

Answer 1

检查名称拼写是否正确（您在代码中写了 loginMainIdentifier ，然后是 loginMainSegue ）。

同时检查此segue是否已从整个 viewController连接到目标viewController。

以编程方式执行故事板Segue

1 个答案: