bugfix:

ibireme/YYKit#273
ibireme#451

Author: ibireme

YYText/Utility/NSAttributedString+YYText.m

@@ -824,7 +824,7 @@ - (void)setYy_strikethroughStyle:(NSUnderlineStyle)strikethroughStyle {
 }
 
 - (void)setYy_strikethroughColor:(UIColor *)strikethroughColor {
-    [self yy_setStrokeColor:strikethroughColor range:NSMakeRange(0, self.length)];
+    [self yy_setStrikethroughColor:strikethroughColor range:NSMakeRange(0, self.length)];
 }
 
 - (void)setYy_underlineStyle:(NSUnderlineStyle)underlineStyle {

YYText/YYTextView.m

@@ -2364,6 +2364,7 @@ - (void)setPlaceholderText:(NSString *)placeholderText {
             _placeholderAttributedText = atr;
         }
     }
+    _placeholderText = [_placeholderAttributedText yy_plainTextForRange:NSMakeRange(0, _placeholderAttributedText.length)];
     [self _commitPlaceholderUpdate];
 }