微信小程序自定义组件示例-蒲公英云

声明：此文借鉴两位前辈的博文
https://www.jianshu.com/p/8a2a730d9e60
http://www.jb51.net/article/117295.htm
感谢这两位前辈的贡献！！！
实现功能：把密码输入封装成一个自定义组件，可以多处调用此组件
component部分：

pwdalert.wxml

<view wx:if="{ { pwd_flag}}" class="password"> <view class="input-content-wrap"> <view class="top"> <view catchtap="close_pwd_alert" class="close">×</view> <view class="txt">{ { pwdtitle}}</view> <view catchtap="modify_password" class="forget"></view> </view> <view class="actual_fee"> <span>{ { currency}}</span> <text>{ { amt}}</text> </view> <view catchtap="setFocus" class="input-password-wrap"> <view class="password_dot"> <i wx:if="{ { pay_password.length>=1}}"></i> </view> <view class="password_dot"> <i wx:if="{ { pay_password.length>=2}}"></i> </view> <view class="password_dot"> <i wx:if="{ { pay_password.length>=3}}"></i> </view> <view class="password_dot"> <i wx:if="{ { pay_password.length>=4}}"></i> </view> <view class="password_dot"> <i wx:if="{ { pay_password.length>=5}}"></i> </view> <view class="password_dot"> <i wx:if="{ { pay_password.length>=6}}"></i> </view> </view> </view> <input bindinput="_pwdEvent" class="input-content" password type="number" focus="{ { isFocus}}" maxlength="6" /> </view>

pwdalert.wxss

page { height: 100%; width: 100%; background: #e8e8e8; }
page .password { position: absolute; left: 0; top: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.7); }
page .password .input-content-wrap { position: absolute; top:300rpx; left: 50%; display: flex; flex-direction: column; width: 600rpx; margin-left: -300rpx; background: #fff; border-radius: 20rpx; }
page .password .input-content-wrap .top { display: flex; align-items: center; height: 90rpx; border-bottom: 2rpx solid #ddd; justify-content: space-around; }
page .password .input-content-wrap .top .close { font-size: 44rpx; color: #999; font-weight: 100; }
page .password .input-content-wrap .top .forget { color: #00a2ff; font-size: 22rpx; }
page .password .input-content-wrap .actual_fee { display: flex; align-items: center; justify-content: center; color: #000; height: 100rpx; margin: 0 23rpx; border-bottom: 2rpx solid #ddd; }
page .password .input-content-wrap .actual_fee span { font-size: 60rpx; }
page .password .input-content-wrap .actual_fee text { font-size: 60rpx; }
page .password .input-content-wrap .input-password-wrap { display: flex; align-items: center; justify-content: center; height: 150rpx; }
page .password .input-content-wrap .input-password-wrap .password_dot { display: flex; align-items: center; justify-content: center; text-align: center; color: #000; box-sizing: border-box; width: 90rpx; height: 90rpx; border: 2rpx solid #ddd; border-left: none 0; }
page .password .input-content-wrap .input-password-wrap .password_dot:nth-child(1) { border-left: 2rpx solid #ddd; }
page .password .input-content-wrap .input-password-wrap .password_dot i { background: #000; border-radius: 50%; width: 20rpx; height: 20rpx; }
page .password .input-content { position: absolute; opacity: 0; left: -100%; top: 600rpx; background: #f56; z-index: -999; }
page .password .input-content.active { z-index: -99; }

pwdalert.json

{
  "component": true }

pwdalert.js

Component({
  properties: {
    pwdtitle: { // 属性名
      type: String, // 类型（必填），目前接受的类型包括：String, Number, Boolean, Object, Array, null（表示任意类型）
      value: '请输入支付密码', // 属性初始值（可选），如果未指定则会根据类型选择一个
      observer: function (newVal, oldVal) {  } // 属性被改变时执行的函数（可选），也可以写成在methods段中定义的方法名字符串, 如：'_propertyChange'
    },
    currency:{ //币种
      type:String,
      value:'',
    },
    amt: { //金额
      type: String,
      value: '',
    },
    pwdfull: { //
      type: String,
      value: '',
    },
  },//组件的对外属性
  data: {
    isFocus: false,//控制input 聚焦
    pwd_flag: false//密码输入遮罩
  },//私有数据，可用于模版渲染
  methods: {
   //组件的方法，包括事件响应函数和任意的自定义方法
    close_pwd_alert: function () { //关闭钱包输入密码遮罩
      console.log('close pwd alert')
      this.setData({
        isFocus: false,//失去焦点
        pwd_flag: false,
      })
    },
    show_pwd_alert: function () { //关闭钱包输入密码遮罩
    console.log('show pwd alert')
      this.setData({
        isFocus: true,//获得焦点
        pwd_flag: true,//获得焦点
      })
    },
    setFocus: function () {     
      console.log('isFocus', this.data.isFocus)
      this.setData({
        isFocus: true
      })
    },
    _pwdEvent: function (e) { 
      var pwd = e.detail.value
     // var app = this
     // console.log("pwdEvent=="+JSON.stringify(e))
      this.setData({
        pay_password: pwd
      });
      if (pwd.length == 6) {
   //密码长度6位时
        //监听密码输入6位时，要做的事情
        console.log("密码长度是6位")
        this.data.pwdfull = pwd
      }
//自定义组件触发事件时，需要使用 triggerEvent 方法，指定事件名、detail对象和事件选项
     // this.triggerEvent("pwdEvent") 
   this.triggerEvent("pwdEvent",e.detail) 
    },
  },
  // 内部方法建议以下划线开头
  _propertyChange: function (newVal, oldVal) { 
  }
})

调用component：
index.wxml

<view class="page"> <view style='padding-left:20rpx;padding-right:20rpx;padding-top:100rpx;'> <button class="weui-btn" type="primary" bindtap="showDialog" style='clear:both'>showDialog</button> </view> <!--调用自定义组件--> <pwddialog id='pwddialog' pwdtitle="{ { pwdtitle}}" currency="{ { currency}}" amt="{ { amt}}" bind:pwdEvent="_pwdEvent" bind:close_pwd_alert="close_pwd_alert" bind:setFocus="setFocus"></pwddialog> </view>

index.wxss

@import "../../utils/weui.wxss";
.primaryfont{ font-size:1.0rem; color:black; }

index.json

{
  "usingComponents": { "dialog": "../components/dialog/dialog", "pwddialog":"../components/pwddialog/pwddialog" } }

index.js

Page({
  data: {
    pwdtitle:"我是标题",
    pwdfull:'',
    currency:'￥',
    amt:'100',
  },
  onReady: function () { /**生命周期函数--监听页面初次渲染完成 *///获得dialog组件 
    this.dialog = this.selectComponent("#pwddialog");
  },
 showDialog: function () { //button点击事件
    console.log("click dialog button1")
    //显示alert
    this.dialog.show_pwd_alert()
    console.log("click dialog button2")
  },
 _pwdEvent(e) { //回调事件 
   console.log("e.detail==" + JSON.stringify(e.detail))
   console.log("e.detail.value==" + JSON.stringify(e.detail.value))
   console.log("pwdfull==" + this.dialog.data.pwdfull)
 },
});