【Kevin Learn 小程序】--＞跑马灯效果

效果图

代码

1.app.js

//app.js App({ onLaunch: function () { console.log('App Launch') }, onShow: function () { console.log('App Show') }, onHide: function () { console.log('App Hide') }, globalData: { hasLogin: false } }) 

1. app.json

{ "pages": [ "pages/marquee/marquee", "pages/logs/logs" ], "window": { "backgroundTextStyle": "light", "navigationBarBackgroundColor": "#fff", "navigationBarTitleText": "WeChat", "navigationBarTextStyle": "black" }, "style": "v2", "sitemapLocation": "sitemap.json" } 

1. 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); } }) 

1. marquee.json

{ "navigationBarTitleText": "跑马灯效果" } 

1. marquee.wxml

<!--pages/marquee/marquee.wxml--> <view class="title">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 class="title">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> <view class="marquee_panel"> <view> <view>配置参数说明</view> <view>size：文字大小</view> <view>marqueePace：滚动速度</view> <view>interval：滚动时间间隔</view> <view>orientation：滚动方向</view> <view>marquee2_margin：2的白边长度</view> </view> </view> 

1. marquee.wxss

Page { background: #fff; overflow: hidden; line-height: 60rpx; } .example { display: block; width: 100%; height: 100rpx; } .marquee_box { width: 100%; position: relative; } .marquee_text { white-space: nowrap; position: absolute; top: 0; } .title { padding: 10rpx 20rpx; margin: 0 0 20rpx 0; border-left: 10rpx solid #ccc; font-size: 30rpx; background: #ececec; } .marquee_panel { margin: 20rpx 20rpx 20rpx 0; border-left: 10rpx solid #ccc; font-size: 26rpx; } .marquee_panel>view { padding: 30rpx; background: #ececec; border-radius: 0 20rpx 20rpx 0; }