實(shí)現(xiàn)效果圖：

微信小程序輸入框input

示例代碼：

<!--input.wxml-->
<view class="section">
 <input placeholder="這是一個(gè)可以自動(dòng)聚焦的input" auto-focus/>
</view>
<view class="section">
 <input placeholder="這個(gè)只有在按鈕點(diǎn)擊的時(shí)候才聚焦" focus="{{focus}}" />
 <view class="btn-area">
 <button bindtap="bindButtonTap">使得輸入框獲取焦點(diǎn)</button>
 </view>
</view>
<view class="section">
 <input maxlength="10" placeholder="最大輸入長度10" />
</view>
<view class="section">
 <view class="sectiontitle">你輸入的是：{{inputValue}}</view>
 <input bindinput="bindKeyInput" placeholder="輸入同步到view中"/>
</view>
<view class="section">
 <input bindinput="bindReplaceInput" placeholder="連續(xù)的兩個(gè)1會(huì)變成2" />
</view>
<view class="section">
 <input bindinput="bindHideKeyboard" placeholder="輸入123自動(dòng)收起鍵盤" />
</view>
<view class="section">
 <input type="emoji" placeholder="這是一個(gè)帶有表情的輸入框" />
</view>
<view class="section">
 <input password type="number" />
</view>
<view class="section">
 <input password type="text" />
</view>
<view class="section">
 <input type="digit" placeholder="帶小數(shù)點(diǎn)的數(shù)字鍵盤"/>
</view>
<view class="section">
 <input type="idcard" placeholder="身份證輸入鍵盤" />
</view>
<view class="section">
 <input placeholder-style="color:red" placeholder="占位符字體是紅色的" />
</view>

//input.js
Page({
 data:{
 focus:false,
 inputValue:""
 },
 bindButtonTap:function(){
 this.setData({
 focus:Date.now()
 })
 },
 bindKeyInput:function(e){
 this.setData({
 inputValue:e.detail.value
 })
 },
 bindReplaceInput:function(e){
 var value = e.detail.value;
 var pos = e.detail.cursor;
 if(pos != -1){
 //光標(biāo)在中間
 var left = e.detail.value.slice(0,pos);
 //計(jì)算光標(biāo)的位置
 pos = left.replace(/11/g,'2').length;
 }

 //直接返回對(duì)象，可以對(duì)輸入進(jìn)行過濾處理，同時(shí)可以控制光標(biāo)的位置
 return {
 value:value.replace(/11/g,'2'),
 cursor:pos
 }

 //或者直接返回字符串,光標(biāo)在最后邊
 //return value.replace(/11/g,'2'),
 },
 bindHideKeyboard:function(e){
 if(e.detail.value === "123"){
 //收起鍵盤
 wx.hideKeyboard();
 }
 }
})

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