微信小程序实现点击按钮修改字体颜色功能【附demo源码下载】

<view class="view" style="color:{{color}}">我是view标签</view>
<view style="display:flex;">  
  <block wx:for="{{colorarray}}" wx:key="" wx:for-item="color">
    <button class="btn" style="background:{{color}};" type="default" bindtap="bindtap{{index}}"></button>
  </block>
</view>

var pagedata={}
pagedata.data={
  color:'black',
  colorarray:['red','blue','yellow','green','black']
}
for(var i=0;i<5;++i){
  (function(index){
    pagedata['bindtap'+index]=function(e){
      this.setdata({
        color:this.data.colorarray[index]
      })
    }
  })(i)
}
page(pagedata)