先上效果图:横向滚动栏实现:网上的几种方案或多或少都有一些问题:1.setData定时器更新
先上效果图:
横向滚动栏实现: 网上的几种方案或多或少都有一些问题: 1.setData定时器更新text view的margin-left方法,由于setData的毫秒延时,动画播放起来一卡一卡; 2.纯CSS实现,keyframe等,无法实现循环播放的设置; 3.使用string.length*font-size的方法获取字符串像素长度,不够精确,多次循环播放后误差会累积变大。 我采用的animate动画方法,实测动画流畅,循环播放无误差。
横向滚动代码如下所示
// wxml
<view class='notice'>
<view class="left">
<text class='iconfont icon-labagonggao voice'></text>
<view class="left-box">
<view class="left-text"></view>
<view class='content-box'>
<view class='content-text' animation="{{animationData}}"><text id="text">{{text}}</text></view>
</view>
<view class="right-text"></view>
</view>
</view>
<view class="right" bindtap="goApp">
<!-- <image class="app" mode="aspectFit" src="/assets/images/app.png" style="width:{{widthrpx}}rpx" bindload="imageLoad"></image> -->
<text class="more">更多应用></text>
</view>
</view>
// wxss
.notice {
display: flex;
align-content: center;
justify-content: space-between;
padding: 10rpx 25rpx;
background: #f1f1f1;
}
.left {
display: flex;
align-items: center;
}
.voice {
margin-right: 5rpx;
margin-top: 2rpx;
color: #fa6016;
}
.left-box {
position: relative;
display: flex;
align-items: center;
}
.left-text {
position: absolute;
left: 0;
width: 40rpx;
height: 100%;
background: linear-gradient(to left,rgba(241,241,241,0),rgba(241,241,241,1));
z-index: 99;
}
.right-text {
position: absolute;
right: -1rpx;
width: 40rpx;
height: 100%;
background: linear-gradient(to left,rgba(241,241,241,1),rgba(241,241,241,0));
z-index: 99;
}
.content-box {
overflow: hidden;
width: 350rpx;
}
.content-text {
color: #5e5e5e;
white-space: nowrap;
font-size: 28rpx;
}
.right {
display: flex;
align-items: center;
}
.app {
height: 48rpx;
}
.more {
margin-left: 5rpx;
color: #aaa;
font-size: 32rpx;
}
// js
data: {
text: "1.【评分标准】页可以查看不同年龄段的评分标准,通过首页选择对应的性别、类别和年龄。2.【单项成绩】页包含了详细的单项打分情况及成绩雷达图,直观地看出自己的弱项和强项。",
animation: null,
timer: null,
duration: 0,
textWidth: 0,
wrapWidth: 0
},
onShow() {
this.initAnimation(this.data.text)
},
onHide() {
this.destroyTimer()
this.setData({
timer: null
})
},
onUnload() {
this.destroyTimer()
this.setData({
timer: null
})
},
destroyTimer() {
if (this.data.timer) {
clearTimeout(this.data.timer);
}
},
/**
* 开启公告字幕滚动动画
* @param {String} text 公告内容
* @return {[type]}
*/
initAnimation(text) {
let that = this
this.data.duration = 15000
this.data.animation = wx.createAnimation({
duration: this.data.duration,
timingFunction: 'linear'
})
let query = wx.createSelectorQuery()
query.select('.content-box').boundingClientRect()
query.select('#text').boundingClientRect()
query.exec((rect) => {
that.setData({
wrapWidth: rect[0].width,
textWidth: rect[1].width
}, () => {
this.startAnimation()
})
})
},
// 定时器动画
startAnimation() {
//reset
// this.data.animation.option.transition.duration = 0
const resetAnimation = this.data.animation.translateX(this.data.wrapWidth).step({ duration: 0 })
this.setData({
animationData: resetAnimation.export()
})
// this.data.animation.option.transition.duration = this.data.duration
const animationData = this.data.animation.translateX(-this.data.textWidth).step({ duration: this.data.duration })
setTimeout(() => {
this.setData({
animationData: animationData.export()
})
}, 100)
const timer = setTimeout(() => {
this.startAnimation()
}, this.data.duration)
this.setData({
timer
})
},
sipwer滚动方式代码如下所示
swiper默认为横向滚动,vertical为true,则纵向滚动
// wxml
<!-- 公告 -->
<text class='swiper-notice'>公告:</text>
<swiper class='swiper-container' autoplay='true' vertical='true' circular='true' interval='2000'>
<block wx:for='{{msgList}}'>
<navigator url='/pages/notice/notice?title={{item.url}}' open-type='navigate'>
<swiper-item>
<view class='swiper-item'>{{item.title}}</view>
</swiper-item>
</navigator>
</block>
</swiper>
<!-- 公告 end -->
// wxss
/* 公告start */
.swiper-notice {
font-size: 28rpx;
color: #fa6016;
}
.swiper-container {
margin-left: 10rpx;
width: 400rpx;
height: 100%;
}
.swiper-item {
position: absolute;
top: 50%;
transform: translateY(-50%);
width: 100%;
font-size: 28rpx;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
letter-spacing: 2rpx;
}
/* 公告end */
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。
小程序 滚动公告栏 小程序 滚动