xml代码

<navigation-bar title="Weixin" back="{{false}}" color="black" background="#FFF"></navigation-bar>
<view>
    <input placeholder="请输入内容" name="content" type="text" bindfocus="getClipboard" value="{{ code }}"/>
</view>

js代码

Page({
    data: {
     code:''
    },
    getClipboard:function(){
        var that = this
      wx.getClipboardData({
        success:function(res){
          wx.showToast({
            title: '剪贴板内容是：'+res.data,
            icon:'none'
          })
          that.setData({
            code:res.data
          })
        },
      })
      return that.data.code
    },
 })

效果展示