UITableView（Swift）中的MFMessageComposeViewController(MFMessageComposeViewController in a UITableView (Swift))

 您可能需要为此推出自己的解决方案，如果您考虑它，这是有意义的。 通过隐藏两个字符的密码较弱但是显示三个字符的密码的视觉提示似乎暗示两个字符的密码就足够了。 
 
 那就是说你可以做的就是编写类似这样的hack： 
 
<script language="javascript">
  function onPasswordChange(textBox) {
      var passwordLabel = document.getElementById([labelID]);
      if(textBox.value.length < [constant]){
          passwordLabel.style.display = 'none';
      }
      else{
          passwordLabel.style.display = 'inline';            
      } 
  }
</script>
 
 然后，您可以附加此函数，控件 
 
   更改 
  onKeyUp或onKeyDown事件，这样，如果密码字段的长度小于您希望的长度，它将隐藏包含未满足强度的消息的标签。 这是一个未经考验的唯一想法。 你最终可能会遇到与这个脚本冲突的工具包javascript的问题，但很难说。 
 
 此外，labelID看起来是[controlIDName] _PasswordStrength。 
 
 编辑： 
 
 您可能希望将 
 
   onchange 
  onKeyUp或onKeyDown事件添加到您的控件中，如下所示（代码隐藏）： 
 
 
 
   control.Attributes.Add（“onchange”，“onPasswordChange（this）”）; 
  
 
 control.Attributes.Add("onKeyDown", "onPasswordChange(this)");
 
 编辑2：就黑客而言，这是非常混乱，但它的工作原理。 客户端： 
 
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>

<asp:TextBox ID="password" runat="server"></asp:TextBox>
<div id="PasswordStrengthContainer"></div>
<asp:PasswordStrength ID="PS" runat="server"
TargetControlID="password"  
DisplayPosition="RightSide"  
StrengthIndicatorType="Text"  
PreferredPasswordLength="10"  
PrefixText="Strength:"  
TextCssClass="TextIndicator_TextBox1"  
MinimumNumericCharacters="0"  
MinimumSymbolCharacters="0"  
RequiresUpperAndLowerCaseCharacters="false"  
TextStrengthDescriptions="Very Poor;Weak;Average;Strong;Excellent"  
TextStrengthDescriptionStyles="cssClass1;cssClass2;cssClass3;cssClass4;cssClass5"  
CalculationWeightings="50;15;15;20"
/>

 <script language="javascript">


function onPasswordChange(textBox) {
    var passwordLabel = document.getElementById("MainContent_password_PasswordStrength");
    var container = document.getElementById("PasswordStrengthContainer");

    if (passwordLabel != null) {
        document.getElementById("PasswordStrengthContainer").appendChild(
            document.getElementById("MainContent_password_PasswordStrength"));
    }

    if (textBox.value.length < 4) {
        container.style.display = 'none';
    }
    else {
        container.style.display = 'inline';
    }
}
 </script>
 
 服务器端： 
 
 password.Attributes.Add("onKeyDown", "onPasswordChange(this)");
 password.Attributes.Add("onBlur", "onPasswordChange(this)");
 
 此代码效率不高，可以清理，但可用于演示目的。 javascript函数非常基本但是你会注意到这一行： 
 
 if (passwordLabel != null) {
        document.getElementById("PasswordStrengthContainer").appendChild(
            document.getElementById("MainContent_password_PasswordStrength"));
    }
 
 不幸的是，工具包javascript函数将在您的函数之后触发，因此工具包会将显示设置为“无”。 这段代码的作用是从页面中删除标签并将其放在div中，然后我们只将div的display属性设置为any，这将有效地隐藏标签。 但是有一个单一的错误：当按下退格键删除字符时，div在某些情况下不会消失。 我没有时间来追查这个问题，但要清除它应该是微不足道的。 
 
 另外我在Chrome中的onChange遇到了一些问题，因此选择onKeyDown而不是上面指出的@Adriano。 

You are probably going to need to roll your own solution for this which makes sense if you think about it. By hiding the visual cue that a password of two characters is weak but displaying it for a password of three characters would seem to imply that the two character password is sufficient. 
 
That being said what you might be able to do is write some sort of hack similar to this:
 
<script language="javascript">
  function onPasswordChange(textBox) {
      var passwordLabel = document.getElementById([labelID]);
      if(textBox.value.length < [constant]){
          passwordLabel.style.display = 'none';
      }
      else{
          passwordLabel.style.display = 'inline';            
      } 
  }
</script>
 
You could then attach this function the controls 
 
   change 
  onKeyUp or onKeyDown event so that if the length of the password field was less than what you want it to be it will hide the label that contains the message that the strength has not been met. This is untested an only a thought. You may wind up with issue from the toolkit javascript colliding with this script but it is tough to say.
 
Additionally the labelID looks to be [controlIDName]_PasswordStrength.
 
Edit:
 
You would probably want to add the 
 
   onchange 
  onKeyUp or onKeyDown event to your control like so (code behind):
 
 
 
   control.Attributes.Add("onchange", "onPasswordChange(this)"); 
 
 
 control.Attributes.Add("onKeyDown", "onPasswordChange(this)");
 
Edit 2: As far as hacks go this is pretty messy but it works. Clientside:
 
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>

<asp:TextBox ID="password" runat="server"></asp:TextBox>
<div id="PasswordStrengthContainer"></div>
<asp:PasswordStrength ID="PS" runat="server"
TargetControlID="password"  
DisplayPosition="RightSide"  
StrengthIndicatorType="Text"  
PreferredPasswordLength="10"  
PrefixText="Strength:"  
TextCssClass="TextIndicator_TextBox1"  
MinimumNumericCharacters="0"  
MinimumSymbolCharacters="0"  
RequiresUpperAndLowerCaseCharacters="false"  
TextStrengthDescriptions="Very Poor;Weak;Average;Strong;Excellent"  
TextStrengthDescriptionStyles="cssClass1;cssClass2;cssClass3;cssClass4;cssClass5"  
CalculationWeightings="50;15;15;20"
/>

 <script language="javascript">


function onPasswordChange(textBox) {
    var passwordLabel = document.getElementById("MainContent_password_PasswordStrength");
    var container = document.getElementById("PasswordStrengthContainer");

    if (passwordLabel != null) {
        document.getElementById("PasswordStrengthContainer").appendChild(
            document.getElementById("MainContent_password_PasswordStrength"));
    }

    if (textBox.value.length < 4) {
        container.style.display = 'none';
    }
    else {
        container.style.display = 'inline';
    }
}
 </script>
 
Serverside: 
 
 password.Attributes.Add("onKeyDown", "onPasswordChange(this)");
 password.Attributes.Add("onBlur", "onPasswordChange(this)");
 
This code is not efficient and could be cleaned up but works for demonstrative purposes. The javascript function is pretty basic however you will notice this line:
 
 if (passwordLabel != null) {
        document.getElementById("PasswordStrengthContainer").appendChild(
            document.getElementById("MainContent_password_PasswordStrength"));
    }
 
Unfortunately the toolkits javascript functions will fire AFTER your function so setting the display to 'none' is wiped out by the toolkit. what this code does is remove the label from the page and places it in the div then we merely set the display property of our div to whatever and that will effectively hide the label. There is a singular bug though: when hitting backspace to delete characters the div doesn't disappear in certain instances. I don't really have time to track down the issue but it should be trivial for you to clear it up. 
 
Additionally I was having some problems with onChange in Chrome so opted for onKeyDown instead as @Adriano pointed out above.