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Question

我有两个视图控制器（view1和view2（说））。在视图1中，我有用于输入用户名和密码的文本框以及登录按钮。在按下登录时，用户应该能够推送到view2（如果用户名和密码是从数据库验证的）。我已经添加下面的方法，当点击登录时被调用：

-(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); 
} 

的问题是，用户能够与任何凭据登录。 Gusr和Gpass正在登录日志。我也应该可能求佛这里厂景和视图2具有相同的自定义类（我用故事板）

确定加入这else部分也可以正常工作。

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

由于库马尔.. :)

Answer 1

尝试这样的：

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 = @""; 
       }