如何修改textField的键盘类型

                             如何修改textField的键盘类型

      

        m_emailField  = [[UITextField  alloc]  initWithFrame:CGRectMake(227, 69, 204, 34)];

        m_emailField.placeholder = @"用于密码找回的邮箱";

        m_emailField.font = fieldFont;

        m_emailField.delegate = self;

        m_emailField.keyboardType = UIKeyboardTypeEmailAddress;

        m_emailField.returnKeyType = UIReturnKeyDone;