微信小程序 自定义d窗

 <button bindtap="powerDrawer" type="primary" size="mini" style="width: 55%;" data-statu="open">中奖记录</button>  

<!-- 中间名单d窗 -->

<view class="drawer_div">

  <view class="drawer_screen" bindtap="powerDrawer" data-statu="close" wx:if="{{showModalStatus}}"></view>

    <view animation="{{animationPrize}}" class="drawer_box" wx:if="{{showModalStatus}}">

      <view class="drawer_title">

        中奖记录

        <image src="/img/x@2xpng" bindtap="powerDrawer" data-statu="close"></image>

      </view>

      <view class="drawer_content">

        <view class="top grid">

          <text>

            名称：啦啦啦啦啦啦啦啦

          </text>

          <text>

            时间：2020-02-20

          </text>

        </view>

        <view class="top grid">

          <text>

            名称：啦啦啦啦啦啦啦啦

          </text>

          <text>

            时间：2020-02-20

          </text>

        </view>

    </view>

  </view>

</view>

drawer_screen {

  width: 100%;

  height: 100%;

  position: fixed;

  top: 0;

  left: 0;

  z-index: 1000;

  background: #000;

  opacity: 05;

  overflow: hidden;

}

/content/

drawer_box {

  width: 650rpx;

  overflow: hidden;

  position: fixed;

  top: 50%;

  left: 0;

  z-index: 1001;

  background: #FAFAFA;

  margin: -150px 50rpx 0 50rpx;

  border-radius: 3px;

}

drawer_title{

  padding:30rpx 20rpx;

  font-size: 36rpx;

  text-align: center;

  position: relative;

}

drawer_title image{

  display: inline-block;

  width: 30rpx;

  height: 30rpx;

  position: absolute;

  right: 9px;

  top: 10px;

}

drawer_content {

  height: 210px;

  overflow-y: scroll; /超出父盒子高度可滚动/

  padding: 0 20rpx;

}

top{

  display: flex;

  justify-content: space-between;

  border-bottom: 1px dashed #ccc;

}

top text{

  display: inline-block;

  height: 60rpx;

  line-height: 20rpx;

}

data: {

animationPrize: {},

}

powerDrawer: function (e) {

    // consolelog(e);

    let currentStatu = ecurrentTargetdatasetstatu;

    thisutil(currentStatu);

  },

  util: function (currentStatu) {

    / 动画部分 /

    // 第1步：创建动画实例

    var animation = wxcreateAnimation({

      duration: 200,  //动画时长

      timingFunction: "linear", //线性

      delay: 0  //0则不延迟

    });

    // 第2步：这个动画实例赋给当前的动画实例

    thisanimation = animation;

    // 第3步：执行第一组动画

    animationopacity(0)rotateX(-100)step();

    // 第4步：导出动画对象赋给数据对象储存

    thissetData({

      animationPrize: animationexport()

    })

    // 第5步：设置定时器到指定时候后，执行第二组动画

    setTimeout(function () {

      // 执行第二组动画

      animationopacity(1)rotateX(0)step();

      // 给数据对象储存的第一组动画，更替为执行完第二组动画的动画对象

      thissetData({

        animationPrize: animation

      })

      //关闭

      if (currentStatu == "close") {

        thissetData({

          showModalStatus: false

        });

      }

    }bind(this), 200)

    // 显示

    if (currentStatu == "open") {

      thissetData({

        showModalStatus: true

      });

    }

  },

showKnock:function(e){

    thissetData({

        flags:true,

        left:edetailx,

        top:edetaily

    })

},

先上一图，这个是最终效果：

再看看闪耀效果：

1、先将文字画在canvas；

2、利用getImageData()获取图像数据；

3、将图像数据中黑色（你可以用其他颜色）按一定间隔取值（获取坐标）；

4、在获取的坐标画矩形（你画其他形状也是可以的）；

5、使用requestAnimationFrame，变换矩形颜色。

这样就闪烁起来了~~

var i = 0

Page({

/ 页面的初始数据/data: {hideNav: false,colors: ["#fff", "#FF6E40", "#FFAB40", "#FFFF00", "#EEFF41", "#B2FF59", "#69F0AE", "#64FFDA", "#18FFFF", "#40C4FF", "#E040FB", "#FF4081", "#ff5252"],

text: '肖战',scroll: false,setting: false},

/ 生命周期函数--监听页面加载/onLoad: function (options) {let that = this, text = wxgetStorageSync('blinkText') || thisdatatext;thissetData({text})thisinit()},

init() {wxcreateSelectorQuery()select('#canvas')fields({node: true,size: true,})exec((res) => {let that = this,text = thisdatatextconst width = res[0]widthconst height = res[0]height

const canvas = res[0]nodeconst ctx = canvasgetContext('2d')const dpr = 1 //wxgetSystemInfoSync()pixelRatiocanvaswidth = width dprcanvasheight = height dprctxscale(dpr, dpr)i = (canvaswidth - thatgetByteLen(text) 100) / 2ctxfillStyle = "#ffffff";ctxfillRect(0, 0, canvaswidth, canvasheight);ctxfont = "bolder 200px Arial";ctxfillStyle = 'black';ctxtextBaseline = 'top';ctxfillText(text, 0, 100);// ctxlineWidth = 5;// ctxstrokeText(text, 0, 100);let imageData = ctxgetImageData(0, 0, canvaswidth, canvasheight)data;// consolelog(imageData)

ctxfillStyle = "#ffffff";ctxfillRect(0, 0, canvaswidth, canvasheight);

thisdatacanvas = canvasthisdatactx = ctxthisdataimageData = imageDataconsolelog(canvaswidth, canvasheight)// thisdrawText()const renderLoop = () => {thisdrawText()

canvasrequestAnimationFrame(renderLoop)}// canvascancelAnimationFrame(renderLoop)canvasrequestAnimationFrame(renderLoop)})},drawText() {var gap = 7,{imageData,canvas,ctx,text,scroll} = thisdataif (scroll) {if (i >= canvaswidth) {i = -canvaswidth}i += 2}

ctxclearRect(0, 0, canvaswidth, canvasheight)for (var h = 0; h < canvasheight; h += gap) {for (var w = 0; w < canvaswidth; w += gap) {var position = (canvaswidth h + w) 4;var r = imageData[position],g = imageData[position + 1],b = imageData[position + 2];

if (r + g + b == 0) {ctxfillStyle = thisdatacolors[Mathfloor(Mathrandom() thisdatacolorslength)];ctxfillRect(w + i, h, 5, 5);}}}

},toggleSetting() {thissetData({setting: thisdatasetting false : true})},setText(e) {

let that = thiswxcloudcallFunction({name: 'msgSecCheck',data: {op: 'textCheck',content: edetailvalue},success(res) {consolelog('ContentCheck-res', res)if (resresultcode == 300) {consolelog(resresultmsg)wxshowToast({icon: 'none',title: resresultmsg,})thatsetData({'text': ''})} else {thatsetData({setting: false,'text': edetailvalue})thatinit()}},fail(err) {consolelog('ContentCheck-errxxxx', err)

}})

},getByteLen(str) {var len = 0;for (var i = 0; i < strlength; i++) {var length = strcharCodeAt(i);if (length >= 0 && length <= 128) {len += 1;} else {len += 2;}}consolelog('文字长度',len)return len;},donothing() {

},/ 生命周期函数--监听页面初次渲染完成/onReady: function () {

},

/ 生命周期函数--监听页面显示/onShow: function () {

},

/ 生命周期函数--监听页面隐藏/onHide: function () {

},

/ 生命周期函数--监听页面卸载/onUnload: function () {wxsetStorage({data: thisdatatext,key: 'blinkText',})},

/ 页面相关事件处理函数--监听用户下拉动作/onPullDownRefresh: function () {

},

/ 页面上拉触底事件的处理函数/onReachBottom: function () {

},

/ 用户点击右上角分享/onShareAppMessage: function () {

}})

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