小程序如何实现多选按钮选中情况下展示图片

Question

wxml

<view class='button_container'>
  <block wx:for="{{buttons}}" wx:key="buttons">
  <button style='width: 250rpx;height: 300rpx;' class='{{item.checked?"checked_button":"normal_button"}}' data-id='{{item.id}}' bindtap='checkButtonTap'>{{item.name}}</button>
  </block>
</view>

wxss

.button_container{
  display: flex;
  flex-direction: row;
  justify-content: space-around
}
/* 按钮未选中 */
.normal_button{
  background: rgb(255, 255, 255)
}
/* 按钮选中 */
.checked_button{
  background: rgb(240, 239, 239);
  color: white
  
}

js

Page({
  data: {
    buttons: [{ id: 1, name: '珍珠' }, { id: 2, name: '红豆' }, { id: 3, name: '寒天' }],
    msg:'',
  },
  checkButtonTap:function(e){
    console.log(e)
    let id = e.currentTarget.dataset.id
    console.log(id)
    for (let i = 0; i < this.data.buttons.length; i++) {
      if (this.data.buttons[i].id == id) {
        if (this.data.buttons[i].checked == true) {
          this.data.buttons[i].checked = false;
         
        } else {
          this.data.buttons[i].checked = true;
          
        }
      }
    }
   this.setData({
     buttons: this.data.buttons,
     msg: "id:"+id
    })
    
  },
})

Answer 1

你的思路已经很清晰了，

只不过是需要有人帮你解决bug