title: UITextField SecureEntryText color changes
body: <p>I have a subclass of <code>UITextField</code> where I set the text color to be white. I am using this subclass for an email field and a password field.</p>
  
  <pre><code>- (void)drawRect:(CGRect)rect {
      [super drawRect:rect];
  
      self.clearButtonMode = UITextFieldViewModeWhileEditing;
      self.layer.backgroundColor = [UIColor clearColor].CGColor;
      self.textColor = [UIColor whiteColor];
      [self setValue:[UIColor whiteColor] forKeyPath:@"_placeholderLabel.textColor"];
      ......
      ......
  </code></pre>
  
  <p>The password field has <code>secureTextEntry</code> set to <code>YES</code>, and when I first type in it the color is white as expected. Then, if I click the clear button, focus on the email field and then focus back on the password field and begin typing, the text is now black.</p>
  
  <p>I'm not sure why it lost the color I set in my <code>drawRect</code> override. If I try the same steps with the email field it stays white no matter how many times I clear and unfocus/refocus the field.</p>
  
  <p>I'm guessing this has to do with the secure text entry. Any help in this area will be much appreciated. Thanks!</p>