ios - 用户登录使用 XCode ios

Question

我有两个 View Controller (view1 和 view2(比方说))。在 view1 中，我有用于输入用户名和密码的文本字段，以及一个登录按钮。按登录后，用户应该能够推送到 view2(如果用户名和密码已从数据库中验证)。我添加了以下方法，单击登录时将调用该方法:

-(IBAction)clickButton:(id)sender
{      const char *dbpath = [mDatabasePath UTF8String];
    sqlite3_stmt    *statement;
    if (sqlite3_open(dbpath, &mDiary) == SQLITE_OK)
    {
        NSString *querySQL = [NSString stringWithFormat: @"SELECT *FROM USERDETAIL"];
         const char *query_stmt = [querySQL UTF8String];
        if (sqlite3_prepare_v2(mDiary, 
                               query_stmt, -1, &statement, NULL) == SQLITE_OK)
        {
            if (sqlite3_step(statement) == SQLITE_ROW)
            {
                Gusr = [[NSString alloc]
                        initWithUTF8String:
                        (const char *) sqlite3_column_text(statement, 0)];
                Gpass = [[NSString alloc]
                         initWithUTF8String:
                         (const char *) sqlite3_column_text(statement, 1)];

                NSLog(@"%@  %@",Gusr,Gpass);
                NSLog(@"%@  %@",mUserName.text,mPassword.text);
                if (!([mUserName.text isEqualToString:Gusr] && [mPassword.text isEqualToString:Gpass])){

                    NSLog(@"Invalid credentials");
                    mUserName.text = @"";
                    mPassword.text = @"";
                    //  [self performSegueWithIdentifier:@"Login" sender:self];
                }else {

                }

            }



        }   
        sqlite3_finalize(statement);

    }     
    sqlite3_close(mDiary);  
}

问题是用户可以使用任何凭据登录。 Gusr 和 Gpass 正在日志中打印。我还应该在这里提到 view1 和 view2 具有相同的自定义类。(我正在使用 Storyboard)

OK 将它添加到 else 部分使其工作:

VIewControllerName *obj = [storyboard instantiateViewControllerWithIdentifier:@"ViewController_storyBoardId"];
[self.navigationController pushViewController:obj animated:YES];

感谢 Kumar.. :)

Answer 1

像这样尝试:

if ([mUserName.text isEqualToString:Gusr] && [mPassword.text isEqualToString:Gpass]){


 UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle: nil];
 VIewControllerName *obj = [storyboard instantiateViewControllerWithIdentifier:@"ViewController_storyBoardId"];

 [self.navigationController pushViewController:obj animated:YES]; // This is using by navigation controller , Are You using it?



                }else {

                    NSLog(@"Invalid credentials");
                    mUserName.text = @"";
                    mPassword.text = @"";
                }