微信提供了複製文字的api:

wxml:

<view class="song-singer" bindtap='copyText'>
       <view class="sin">{{ authorname }} - </view>
       <view class="son">{{ name }}</view>
     </view>

js:

// 複製文字事件
  copyText:function(){
    wx.setClipboardData({
      data: this.data.name+'-'+ this.data.authorname,
      success(res) {
        wx.getClipboardData({
          success(res) {
            console.log(res.data) // data
          }
        })
      }
    })
  }