微信小程序---点击按钮添加、删除输入框(input)

<block wx:for="{{lists}}" wx:key="{{index}}">
<input class='create-li' data-id="{{index}}" placeholder="选项"  bindinput='bindKeyInput'></input>
</block>
<button class='add-li' bindtap='addList'>添加选项</button>
<button class='add-li' bindtap='delList'>删除选项</button>

Page({
data: {
lists:[{},{}],
},
addList: function(){
var  lists = this.data.lists;
var newData = {};
lists.push(newData);//实质是添加lists数组内容，使for循环多一次
this.setData({
lists: lists,
})
},
delList: function () {
var lists = this.data.lists;
lists.pop();      //实质是删除lists数组内容，使for循环少一次
this.setData({
lists: lists,
})
},
})