为什么我这里的wx:key没作用，input内容改变后，添加项后数据还是还原了
<input type='text' value='{{item.id}}' wx:for="{{objectArray}}" wx:key="unique" style="display: block;"></input> <button bindtap="switch"> Switch </button> <button bindtap="addToFront"> Add to the front </button> <input type='text' value='{{item}}' wx:for="{{numberArray}}" wx:key="*this" style="display: block;"></input> <button bindtap="addNumberToFront"> Add to the front </button> const app = getApp() Page({
data: {
objectArray: [
{ id: 5, unique: 'unique_5' },
{ id: 4, unique: 'unique_4' },
{ id: 3, unique: 'unique_3' },
{ id: 2, unique: 'unique_2' },
{ id: 1, unique: 'unique_1' },
{ id: 0, unique: 'unique_0' },
],
numberArray: [1, 2, 3, 4]
},
switch: function (e) {
const length = this.data.objectArray.length
for (let i = 0; i < length; ++i) {
const x = Math.floor(Math.random() * length)
const y = Math.floor(Math.random() * length)
const temp = this.data.objectArray[x]
this.data.objectArray[x] = this.data.objectArray[y]
this.data.objectArray[y] = temp
}
this.setData({
objectArray: this.data.objectArray
})
},
addToFront: function (e) {
const length = this.data.objectArray.length
this.data.objectArray = [{ id: length, unique: 'unique_' + length }].concat(this.data.objectArray)
this.setData({
objectArray: this.data.objectArray
})
},
addNumberToFront: function (e) {
this.data.numberArray = [this.data.numberArray.length + 1].concat(this.data.numberArray)
this.setData({
numberArray: this.data.numberArray
})
}
})
