有沒有大佬知道怎么解決小程序swiper里用canvas樣式錯(cuò)亂

問題描述

小程序swiper里用canvas樣式錯(cuò)亂，電腦正常的，放手機(jī)上就出錯(cuò)了

wxml

<!-- pages/index/test.wxml -->
<view>
    <scroll-view scroll-x="true" class="tab-h" scroll-left="{{scrollLeft}}">
        <view class="tab-item {{currentTab==0?'active':''}}" data-current="0" bindtap="swichNav">
            健康
        </view>
        <view class="tab-item {{currentTab==1?'active':''}}" data-current="1" bindtap="swichNav">
            情感
        </view>
        <view class="tab-item {{currentTab==2?'active':''}}" data-current="2" bindtap="swichNav">
            職場(chǎng)
        </view>
        <view class="tab-item {{currentTab==3?'active':''}}" data-current="3" bindtap="swichNav">
            育兒
        </view>
        <view class="tab-item {{currentTab==4?'active':''}}" data-current="4" bindtap="swichNav">
            糾紛
        </view>
        <view class="tab-item {{currentTab==5?'active':''}}" data-current="5" bindtap="swichNav">
            青蔥
        </view>
        <view class="tab-item {{currentTab==6?'active':''}}" data-current="6" bindtap="swichNav">
            全部
        </view>
        <view class="tab-item {{currentTab==7?'active':''}}" data-current="7" bindtap="swichNav">
            其他
        </view>
    </scroll-view>
    <swiper class="tab-content" current="{{currentTab}}" duration="300" bindchange="switchTab" style="height:{{winHeight}}rpx">
        <swiper-item wx:for="{{[0,1,2,3,4,5,6,7]}}" wx:key="*this">
            <!-- <scroll-view scroll-y="true" class="scoll-h" >
                <block wx:for="{{[1,2,3,4,5,6,7,8]}}" wx:key="*this">
                    <view class="item-ans">
                        <view class="avatar">
                            <image class="img" src="http://ookzqad11.bkt.clouddn.com/avatar.png"></image>
                        </view>
                        <view class="expertInfo">
                            <view class="name">歡顏</view>
                            <view class="tag">知名情感博主</view>
                            <view class="answerHistory">134個(gè)回答，2234人聽過 </view>
                        </view>
                        <navigator url="/pages/askExpert/expertDetail" class="askBtn">問TA</navigator> 
                    </view>
                </block>
            </scroll-view> -->
            <view class="wrap">
                <view class="top">
                    <canvas class="cir" style="width:212px; height:212px;" canvas-id="canvasArc-{{item}}"></canvas>
                    <view class="cc">中間</view>
                </view>
            </view>
        </swiper-item>
    </swiper>
</view>

var app = getApp();
Page({
    data: {
        winHeight: "",//窗口高度
        currentTab: 0, //預(yù)設(shè)當(dāng)前項(xiàng)的值
        scrollLeft: 0, //tab標(biāo)題的滾動(dòng)條位置
        expertList: [{ //假數(shù)據(jù)
            img: "avatar.png",
            name: "歡顔",
            tag: "知名情感博主",
            answer: 134,
            listen: 2234
        }]
    },
    // 滾動(dòng)切換標(biāo)簽樣式
    switchTab: function (e) {
        this.setData({
            currentTab: e.detail.current
        });
        this.checkCor();

        function createCanvas(id) {
            // 頁面渲染完成
            var cxt_arc = wx.createCanvasContext('canvasArc-'+id);//創(chuàng)建并返回繪圖上下文context對(duì)象。
            cxt_arc.setLineWidth(6);
            cxt_arc.setStrokeStyle('#d2d2d2');
            cxt_arc.setLineCap('round')
            cxt_arc.beginPath();//開始一個(gè)新的路徑
            cxt_arc.arc(106, 106, 100, 0, 2 * Math.PI, false);//設(shè)置一個(gè)原點(diǎn)(106,106)，半徑為100的圓的路徑到當(dāng)前路徑
            cxt_arc.stroke();//對(duì)當(dāng)前路徑進(jìn)行描邊

            cxt_arc.setLineWidth(6);
            cxt_arc.setStrokeStyle('#3ea6ff');
            cxt_arc.setLineCap('round')
            cxt_arc.beginPath();//開始一個(gè)新的路徑
            cxt_arc.arc(106, 106, 100, -Math.PI * 1 / 2, Math.PI * 6 / 5, false);
            cxt_arc.stroke();//對(duì)當(dāng)前路徑進(jìn)行描邊

            cxt_arc.draw();
        }

        setTimeout(() => {
            createCanvas(e.detail.current)
        }, 2000);
        
    },
    // 點(diǎn)擊標(biāo)題切換當(dāng)前頁時(shí)改變樣式
    swichNav: function (e) {
        var cur = e.target.dataset.current;
        if (this.data.currentTaB == cur) { return false; }
        else {
            this.setData({
                currentTab: cur
            })
        }
    },
    //判斷當(dāng)前滾動(dòng)超過一屏?xí)r，設(shè)置tab標(biāo)題滾動(dòng)條。
    checkCor: function () {
        if (this.data.currentTab > 4) {
            this.setData({
                scrollLeft: 300
            })
        } else {
            this.setData({
                scrollLeft: 0
            })
        }
    },
    onLoad: function () {
        var that = this;
        //  高度自適應(yīng)
        wx.getSystemInfo({
            success: function (res) {
                var clientHeight = res.windowHeight,
                    clientWidth = res.windowWidth,
                    rpxR = 750 / clientWidth;
                var calc = clientHeight * rpxR - 180;
                console.log(calc)
                that.setData({
                    winHeight: calc
                });
            }
        });
    },
    onReady: function () {
        [0,1,2,3,4,5,6,7].forEach(el => {
            // createCanvas(el);
        });

        function createCanvas(id) {
            // 頁面渲染完成
            var cxt_arc = wx.createCanvasContext('canvasArc-'+id);//創(chuàng)建并返回繪圖上下文context對(duì)象。
            cxt_arc.setLineWidth(6);
            cxt_arc.setStrokeStyle('#d2d2d2');
            cxt_arc.setLineCap('round')
            cxt_arc.beginPath();//開始一個(gè)新的路徑
            cxt_arc.arc(106, 106, 100, 0, 2 * Math.PI, false);//設(shè)置一個(gè)原點(diǎn)(106,106)，半徑為100的圓的路徑到當(dāng)前路徑
            cxt_arc.stroke();//對(duì)當(dāng)前路徑進(jìn)行描邊

            cxt_arc.setLineWidth(6);
            cxt_arc.setStrokeStyle('#3ea6ff');
            cxt_arc.setLineCap('round')
            cxt_arc.beginPath();//開始一個(gè)新的路徑
            cxt_arc.arc(106, 106, 100, -Math.PI * 1 / 2, Math.PI * 6 / 5, false);
            cxt_arc.stroke();//對(duì)當(dāng)前路徑進(jìn)行描邊

            cxt_arc.draw();
        }
        

    },
    footerTap: app.footerTap
})

wxss

/* pages/index/test.wxss */
.tab-h{
    height: 80rpx;width: 100%; box-sizing: border-box;overflow: hidden;line-height: 80rpx;background: #F7F7F7; font-size: 16px; white-space: nowrap;position: fixed;top: 0; left: 0; z-index: 99;}
.tab-item{margin:0 36rpx;display: inline-block;}
.tab-item.active{color: #4675F9;position: relative;}
.tab-item.active:after{ content: "";display: block;height: 8rpx;width: 52rpx;background: #4675F9;position: absolute; bottom: 0;left: 5rpx;border-radius: 16rpx;}
.item-ans{ width: 100%;display: flex; flex-grow: row no-wrap;justify-content: space-between; padding: 30rpx;box-sizing: border-box; height: 180rpx;align-items: center;border-bottom: 1px solid #F2F2F2;}
.avatar{width: 100rpx;height: 100rpx;position: relative;padding-right: 30rpx;}
.avatar .img{width: 100%;height: 100%;}
.avatar .doyen{width: 40rpx;height: 40rpx;position: absolute;bottom: -2px;right: 20rpx;}
.expertInfo{font-size: 12px;flex-grow: 2;color: #B0B0B0;line-height: 1.5em;}
.expertInfo .name{font-size: 16px;color:#000;margin-bottom: 6px;}
.askBtn{ width: 120rpx;height: 60rpx;line-height: 60rpx;text-align: center;font-size: 14px; border-radius: 60rpx;border: 1px solid #4675F9; color:#4675F9;}
.tab-content{margin-top: 80rpx;}
.scoll-h{height: 100%;}



.cir{
    display: inline-block;
    margin-top: 20rpx;
   
  }
   
  .top{
    text-align: center
  }
   
  .cc{
    
    margin-top: -120px;
    
  }

求幫幫忙運(yùn)行看看怎么解決~

回答

編輯回答