《微信小程序案例4》bindtap点击事件使用自定义数据data-xxx传参方法

一、错误方法

bindtap="selected(1)"

二、正确方法

1、首先在标签中使用data-xxx来自定义要传入的数据，xxx代表数据值

2、绑定事件bindtap=xxx

3、在js中使用event.currentTarget.dataset.xxx来取你传入的值

 <view wx:for="{
   
   {itemList}}" bindtap="selected" data-id="{
   
   {item.id}}">
    <span class="{
   
   {item.select ? 'active' : 'noactive'}}">{
   
   {item.name}}</span></view> 
  </view>

  data: {
    itemList: [
      {name: '推荐', id: 0, select: true},
      {name: 'Xiaomi手机', id: 1, select: false},
      {name: 'Redmi手机', id: 2, select: false},
      {name: '游戏手机', id: 3, select: false},
      {name: '电脑平板', id: 4, select: false},
      {name: '智能穿戴', id: 5, select: false},
      {name: '电视', id: 6, select: false},
      {name: '大家电', id: 7, select: false},
      {name: '小家电', id: 8, select: false},
      {name: '智能家居', id: 9, select: false},
      {name: '出行运动', id: 10, select: false},
      {name: '日用百货', id: 11, select: false},
      {name: '儿童用品', id: 12, select: false},
    ]
    },

  selected:function(e){
    console.log(e.currentTarget.dataset.id)
  },

点击结果成功：