微信小程序 - 发送视频弹幕

微信小程序官方文档提供了发送视频弹幕的功能，参照其功能做了一些改动，实现可发送用户自定义颜色的弹幕。

function getRandomColor() {var rgb = [];for (var i = 0; i < 3; ++i) {var color = Math.floor(Math.random() * 256).toString(16);color = color.length == 1 ? '0' + color : color;rgb.push(color);}return '#' + rgb.join('');
}
Page({inputValue: '',data: {isRandomColor: true,src: '',numberColor: "#ff0000",danmuList: [{text: '第 1s 出现的红色弹幕',color: '#ff0000',time: 1}, {text: '第 2s 出现的绿色弹幕',color: '#00ff00',time: 2}]},onLoad: function onLoad() {var _this = this;wx.getSystemInfo({success: function success(res) {// video标签默认宽度300px、高度225pxvar windowWidth = res.windowWidth;                var videoHeight = 225 / 300 * windowWidth;_this.setData({videoWidth: windowWidth,videoHeight: videoHeight});}});},onReady: function onReady(res) {this.videoContext = wx.createVideoContext('myVideo');},onShow: function onShow() {var _this = this;wx.getStorage({key: 'numberColor',success: function success(res) {_this.setData({numberColor: res.data});}});},bindInputBlur: function(e) {this.inputValue = e.detail.value;},bindSendDanmu: function() {if (this.data.isRandomColor) {var color = getRandomColor();} else {var color = this.data.numberColor;}this.videoContext.sendDanmu({text: this.inputValue,color: color});},videoErrorCallback: function(e) {console.log('视频错误信息:');console.log(e.detail.errMsg);},switchChange: function(e) {this.setData({isRandomColor: e.detail.value});},//跳转到选择颜色的页面selectColor: function() {wx.navigateTo({url: '../selectColor/selectColor',success: function(res) {},fail: function fail() {},complete: function() {}});}
});

<view class="section tc"><video id="myVideo" style="height:{{videoHeight}}px;width:{{videoWidth}}px" src="http://wxsnsdy.tc.qq.com/105/20210/snsdyvideodownload?filekey=30280201010421301f0201690402534804102ca905ce620b1241b726bc41dcff44e00204012882540400&bizid=1023&hy=SH&fileparam=302c020101042530230204136ffd93020457e3c4ff02024ef202031e8d7f02030f42400204045a320a0201000400" binderror="videoErrorCallback" danmu-list="{{danmuList}}" enable-danmu danmu-btn controls></video><view class="btn-area"><view class="weui-cell weui-cell_input"><view class="weui-cell__bd"><input class="weui-input" placeholder="请输入弹幕" bindblur="bindInputBlur" /></view></view><button type="primary" style="margin:30rpx;" bindtap="bindSendDanmu">发送弹幕</button></view>
</view><view class="weui-cells weui-cells_after-title"><view class="weui-cell weui-cell_switch"><view class="weui-cell__bd">随机颜色</view><view class="weui-cell__ft"><switch checked bindchange="switchChange" /></view></view><view class="colorstyle"  bindtap="selectColor"><text>选择颜色</text><view style="height:80rpx;width:80rpx;line-height: 100rpx;margin:10rpx;background-color:{{numberColor}}"></view></view>
</view>

.weui-cells {position: relative;margin-top: 1.17647059em;background-color: #FFFFFF;line-height: 1.41176471;font-size: 17px;
}
.weui-cells:before {content: " ";position: absolute;left: 0;top: 0;right: 0;height: 1px;border-top: 1rpx solid #D9D9D9;color: #D9D9D9;
}
.weui-cells:after {content: " ";position: absolute;left: 0;bottom: 0;right: 0;height: 1px;border-bottom: 1rpx solid #D9D9D9;color: #D9D9D9;
}
.weui-cells_after-title {margin-top: 0;
}
.weui-cell__bd {-webkit-box-flex: 1;-webkit-flex: 1;flex: 1;
}
.weui-cell__ft {text-align: right;color: #999999;
}.weui-cell {padding: 10px 10px;position: relative;display: -webkit-box;display: -webkit-flex;display: flex;-webkit-box-align: center;-webkit-align-items: center;align-items: center;
}
.weui-cell:before {content: " ";position: absolute;top: 0;right: 0;height: 1px;border-top: 1rpx solid #D9D9D9;color: #D9D9D9;left: 15px;
}
.weui-cell:first-child:before {display: none;
}
.colorstyle{border-top: 2px solid #eee;border-bottom: 2px solid #eee;padding-left: 10px;padding-right: 10px;font-size: 17px;line-height: 100rpx;display: flex;flex-direction: row;justify-content:space-between;
}
.vertical {height: 40px;position: absolute;top: 50%;margin-top: -20px;
}

效果如图：

下面是选择弹幕文字颜色的页面，选择文字颜色之后跳转回发送弹幕页面

var app = getApp()
Page({data: {color: [{ key: 1, color: ' 白色 ', number: '#FFFFFF' },{ key: 2, color: ' 红色 ', number: '#FF0000' },{ key: 3, color: ' 绿色 ', number: '#00FF00' },{ key: 4, color: ' 蓝色 ', number: '#0000FF' },{ key: 5, color: ' 牡丹红 ', number: '#FF00FF' },{ key: 6, color: ' 青色 ', number: '#00FFFF' },{ key: 7, color: ' 黄色 ', number: '#FFFF00' },{ key: 8, color: ' 黑色 ', number: '#000000' },{ key: 9, color: ' 海蓝 ', number: '#70DB93' },{ key: 10, color: ' 巧克力色 ', number: '#5C3317' },{ key: 11, color: ' 蓝紫色 ', number: '#9F5F9F' },{ key: 12, color: ' 黄铜色 ', number: '#B5A642' },{ key: 13, color: ' 亮金色 ', number: '#D9D919' },{ key: 14, color: ' 棕色 ', number: '#A67D3D' },{ key: 15, color: ' 青铜色 ', number: '#8C7853' },{ key: 16, color: ' 2号青铜色 ', number: '#A67D3D' },{ key: 17, color: ' 士官服蓝色 ', number: '#5F9F9F' },{ key: 18, color: ' 冷铜色 ', number: '#D98719' },{ key: 19, color: ' 铜色 ', number: '#B87333' },{ key: 20, color: ' 珊瑚红 ', number: '#FF7F00' },{ key: 21, color: ' 紫蓝色 ', number: '#42426F' },{ key: 22, color: ' 深棕 ', number: '#5C4033' },{ key: 23, color: ' 深绿 ', number: '#2F4F2F' },{ key: 24, color: ' 深铜绿色 ', number: '#4A766E' },{ key: 25, color: ' 深橄榄绿 ', number: '#4F4F2F' },{ key: 26, color: ' 深兰花色 ', number: '#9932CD' },{ key: 27, color: ' 深紫色 ', number: '#871F78' },{ key: 28, color: ' 深石板蓝 ', number: '#6B238E' },{ key: 29, color: ' 深铅灰色 ', number: '#2F4F4F' },{ key: 30, color: ' 深棕褐色 ', number: '#97694F' },{ key: 32, color: ' 深绿松石色 ', number: '#7093DB' },{ key: 33, color: ' 暗木色 ', number: '#855E42' },{ key: 34, color: ' 淡灰色 ', number: '#545454' },{ key: 35, color: ' 土灰玫瑰红色 ', number: '#856363' },{ key: 36, color: ' 长石色 ', number: '#D19275' },{ key: 37, color: ' 火砖色 ', number: '#8E2323' },{ key: 38, color: ' 森林绿 ', number: '#238E23' },{ key: 39, color: ' 金色 ', number: '#CD7F32' },{ key: 40, color: ' 鲜黄色 ', number: '#DBDB70' },{ key: 41, color: ' 灰色 ', number: '#C0C0C0' },{ key: 42, color: ' 铜绿色 ', number: '#527F76' },{ key: 43, color: ' 青黄色 ', number: '#93DB70' },{ key: 44, color: ' 猎人绿 ', number: '#215E21' },{ key: 45, color: ' 印度红 ', number: '#4E2F2F' },{ key: 46, color: ' 土黄色 ', number: '#9F9F5F' },{ key: 47, color: ' 浅蓝色 ', number: '#C0D9D9' },{ key: 48, color: ' 浅灰色 ', number: '#A8A8A8' },{ key: 49, color: ' 浅钢蓝色 ', number: '#8F8FBD' },{ key: 59, color: ' 浅木色 ', number: '#E9C2A6' },{ key: 60, color: ' 石灰绿色 ', number: '#32CD32' },{ key: 61, color: ' 桔黄色 ', number: '#E47833' },{ key: 62, color: ' 褐红色 ', number: '#8E236B' },{ key: 63, color: ' 中海蓝色 ', number: '#32CD99' },{ key: 64, color: ' 中蓝色 ', number: '#3232CD' },{ key: 65, color: ' 中森林绿 ', number: '#6B8E23' },{ key: 66, color: ' 中鲜黄色 ', number: '#EAEAAE' },{ key: 67, color: ' 中兰花色 ', number: '#9370DB' },{ key: 68, color: ' 中海绿色 ', number: '#426F42' },{ key: 69, color: ' 中石板蓝色 ', number: '#7F00FF' },{ key: 70, color: ' 中春绿色 ', number: '#7FFF00' },{ key: 71, color: ' 中绿松石色 ', number: '#70DBDB' },{ key: 72, color: ' 中紫红色 ', number: '#DB7093' },{ key: 73, color: ' 中木色 ', number: '#A68064' },{ key: 74, color: ' 深藏青色 ', number: '#2F2F4F' },{ key: 75, color: ' 海军蓝 ', number: '#23238E' },{ key: 76, color: ' 霓虹篮 ', number: '#4D4DFF' },{ key: 77, color: ' 霓虹粉红 ', number: '#FF6EC7' },{ key: 78, color: ' 新深藏青色 ', number: '#00009C' },{ key: 79, color: ' 新棕褐色 ', number: '#EBC79E' },{ key: 80, color: ' 暗金黄色 ', number: '#CFB53B' },{ key: 81, color: ' 橙色 ', number: '#FF7F00' }],},selectColor: function (e) {var number = e.currentTarget.dataset.number;try {wx.setStorageSync('numberColor', number)} catch (e) {}wx.navigateBack({delta: 1,success: function (res) {},fail: function () {},complete: function () {}})}
})

<view class="page"><view class="page__bd"><view class="weui-grids"><block wx:for-items="{{color}}"  ><view  class="weui-grid"  data-number="{{item.number}}" bindtap="selectColor" ><view class="weui-grid__icon"  style="background:{{item.number}}"/></view></block></view></view>
</view>

.weui-grids {border-top: 1rpx solid #D9D9D9;border-left: 1rpx solid #D9D9D9;
}
.weui-grid {position: relative;float: left;padding: 20rpx 20rpx;width: 20%;box-sizing: border-box;border-right: 1rpx solid #D9D9D9;border-bottom: 1rpx solid #D9D9D9;
}
.weui-grid_active {background-color: #ccc;
}
.weui-grid__icon {display: block;width: 100rpx;height: 100rpx;margin: 0 auto;box-shadow: 3px 3px 5px #bbb;}
.weui-grid__label {margin-top: 5px;display: block;text-align: center;color: #000000;font-size: 14px;white-space: nowrap;text-overflow: ellipsis;overflow: hidden;
}

效果如图：