添加样式继承的类名

src/components/NumberDrop/index.jsx

@@ -250,7 +250,7 @@ class NumberDrop extends Component{
     return <div className={this.getClasses(nospecial)}
                 style={{position:'relative'}}
                 onClick={allClick?this.handleNumClick:null}>
-      <span>{prefix}</span>
+      <span className="prefixUnset">{prefix}</span>
       <span onFocus={this.handleNumFocus}
             onClick={allClick?null:this.handleNumClick}
             contentEditable={true}
@@ -261,7 +261,7 @@ class NumberDrop extends Component{
             onInput={this.handleSpanInp}
             className={this.getSpanClass(nospecial)}
             >&nbsp;{val||placeholder}</span>
-      <span>{suffix}</span>
+      <span className="prefixUnset">{suffix}</span>
       <NumberPan handleSelect={this.select.bind(this)}
                  noString={formulaCode?true:false}
                  onClose={handleHide}