小程序实现多button单选/多选
红色为选中状态
①wxss
/* pages/button-select/button-select.wxss */
.button_container{
display: flex;
flex-direction: row;
justify-content: space-around
}
/* 按钮未选中 */
.normal_button{
background: greenyellow
}
/* 按钮选中 */
.checked_button{
background: red;
color: white
}
②wxm
<!--pages/button-select/button-select.wxml-->
<view class='button_container'>
<block wx:for="{{buttons}}" wx:key="buttons">
<button class='{{item.checked?"checked_button":"normal_button"}}' data-id='{{item.id}}' bindtap='radioButtonTap'>{{item.name}}</button>
</block>
</view>
<text>{{msg}}</text>
③js
data: {
buttons: [{ id: 1, name: '银色' }, { id: 2, name: '白色' }, { id: 3, name: '黑色' }],
msg:'',
},
onLoad: function (options) {
this.data.buttons[0].checked = true;
this.setData({
buttons: this.data.buttons,
})
},
/**
* 事件监听,实现单选效果
* e是获取e.currentTarget.dataset.id所以是必备的，跟前端的data-id获取的方式差不多
*/
radioButtonTap: 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) {
//当前点击的位置为true即选中
this.data.buttons[i].checked = true;
}
else {
//其他的位置为false
this.data.buttons[i].checked = false;
}
}
this.setData({
buttons: this.data.buttons,
msg: "id:"+id
})
},
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
})
},