小程序实现密码输入框

<view class="Toptitle">请设置支付密码并妥善保管</view>
<form bindsubmit="formSubmit">
 <view class='content'>
 <block wx:for="{{Length}}" wx:key="item">
  <input class='iptbox' value="{{Value.length>=index+1" disabled password='{{ispassword}}' catchtap='Tap'></input>
 </block>
 </view>
 <input name="password" password="{{true}}" class='ipt' maxlength="{{Length}}" focus="{{isFocus}}" bindinput="Focus"></input>
 <view>
 <button class="btn-area" type='primary' disabled='{{disabled}}' formType="primary">下一步</button>
 </view>
</form>

/* pages/mima/mima.wxss */
.Toptitle{
 text-align: center;
 margin: 60rpx auto 46rpx;
 font-size: 26rpx;
}
.content{
 width: 660rpx;
 padding:0 45rpx;
 display: flex;
 justify-content: space-around;
 align-items: center;
 margin-top: 100rpx;
}
.iptbox{
 width: 110rpx;
 height: 96rpx;
 border:1rpx solid #ddd;
 box-sizing: border-box;
 display: flex;
 justify-content: center;
 align-items: center;
 text-align: center;
}
.ipt{
 width: 0;
 height: 0;
}
.btn-area{
 width: 80%;
 margin-top: 60rpx;
}

Page({
 data: {
 Length: 6,  //输入框个数
 isFocus: true, //聚焦
 Value: "",  //输入的内容
 ispassword: true, //是否密文显示 true为密文， false为明文。
 disabled:true,
 },
 Focus(e) {
 var that = this;
 console.log(e.detail.value);
 var inputValue = e.detail.value;
 var ilen = inputValue.length;
 if(ilen == 6){
  that.setData({
  disabled: false,
  })
 }else{
  that.setData({
  disabled: true,
  })
 }
 that.setData({
  Value: inputValue,
 })
 },
 Tap() {
 var that = this;
 that.setData({
  isFocus: true,
 })
 },
 formSubmit(e) {
 console.log(e.detail.value.password);
 },
 
 onLoad: function (options) {
 
 },
 onShow: function () {
 
 },
})