效果
wxml
- <view>1 显示完后再显示</view>
- <view class="example">
- <view class="marquee_box">
- <view class="marquee_text" style="{{orientation}}:{{marqueeDistance}}px;font-size: {{size}}px;">
- {{text}}
- </view>
- </view>
- </view>
- <view>2 出现白边后即显示</view>
- <view class="example">
- <view class="marquee_box">
- <view class="marquee_text" style="{{orientation}}:{{marqueeDistance2}}px;font-size: {{size}}px;">
- <text>{{text}}</text>
- <text wx:if="{{marquee2copy_status}}" style="margin-left:{{marquee2_margin}}px;">{{text}}</text>
- </view>
- </view>
- </view>
wxss
- .example {
- display: block;
- width: 100%;
- height: 100rpx;
- }
- .marquee_box {
- width: 100%;
- position: relative;
- }
- .marquee_text {
- white-space: nowrap;
- position: absolute;
- top: 0;
- }
js
- // pages/home/marquee/marquee.js
- Page({
- data: {
- text: '这是一条会滚动的文字滚来滚去的文字跑马灯,哈哈哈哈哈哈哈哈',
- marqueePace: 1,//滚动速度
- marqueeDistance: 0,//初始滚动距离
- marqueeDistance2: 0,
- marquee2copy_status: false,
- marquee2_margin: 60,
- size: 14,
- orientation: 'left',//滚动方向
- interval: 20 // 时间间隔
- },
- onShow: function () {
- // 页面显示
- var vm = this;
- var length = vm.data.text.length * vm.data.size;//文字长度
- var windowWidth = wx.getSystemInfoSync().windowWidth;// 屏幕宽度
- vm.setData({
- length: length,
- windowWidth: windowWidth,
- marquee2_margin: length < windowWidth ? windowWidth - length : vm.data.marquee2_margin//当文字长度小于屏幕长度时,需要增加补白
- });
- vm.run1();// 水平一行字滚动完了再按照原来的方向滚动
- vm.run2();// 第一个字消失后立即从右边出现
- },
- run1: function () {
- var vm = this;
- var interval = setInterval(function () {
- if (-vm.data.marqueeDistance < vm.data.length) {
- vm.setData({
- marqueeDistance: vm.data.marqueeDistance - vm.data.marqueePace,
- });
- } else {
- clearInterval(interval);
- vm.setData({
- marqueeDistance: vm.data.windowWidth
- });
- vm.run1();
- }
- }, vm.data.interval);
- },
- run2: function () {
- var vm = this;
- var interval = setInterval(function () {
- if (-vm.data.marqueeDistance2 < vm.data.length) {
- // 如果文字滚动到出现marquee2_margin=30px的白边,就接着显示
- vm.setData({
- marqueeDistance2: vm.data.marqueeDistance2 - vm.data.marqueePace,
- marquee2copy_status: vm.data.length + vm.data.marqueeDistance2 <= vm.data.windowWidth + vm.data.marquee2_margin,
- });
- } else {
- if (-vm.data.marqueeDistance2 >= vm.data.marquee2_margin) { // 当第二条文字滚动到最左边时
- vm.setData({
- marqueeDistance2: vm.data.marquee2_margin // 直接重新滚动
- });
- clearInterval(interval);
- vm.run2();
- } else {
- clearInterval(interval);
- vm.setData({
- marqueeDistance2: -vm.data.windowWidth
- });
- vm.run2();
- }
- }
- }, vm.data.interval);
- }
- })