小程序看完激励视频发放奖励（含解决重复发放奖励的bug）

在写抖音小程序或微信小程序时，怎样使用激励视频并且看完激励视频发放广告（关闭清除广告奖励就不会重复发放）

首先，得去开放者平台的广告中心，里面有一个流量主，然后点击广告管理去新建一个广告位，选择激励广告，然后你就有了一个广告位ID，先把它复制下来，备用。

微信：目前开通流量主要1000UV，对于刚上线的小程序来说可能比较难。

抖音：开通流量主需要企业或者个体（带企业网银，对公账号和公章），另外一个需要小程序评分达到B级以上评分才能开通流量主，对于刚上线的小程序比较友好，只要小程序评分够就能马上开通，上线赚钱。

第二步，在需要用激励视频的页面定义变量

var videoAd = null;
Page({})

第三步，在页面加载的时侯创建广告

onLoad: function(options) {
if (tt.createRewardedVideoAd) {

                    videoAd = tt.createRewardedVideoAd({
                        adUnitId: res.data.advTiktokId,
                    });
                    //防止奖励重复发放
                    try {
                        if (videoAd.closeHandler) {
                            videoAd.offClose(videoAd.closeHandler);
                            console.log("videoAd.offClose卸载成功");
                        }
                    } catch (e) {
                        console.log("videoAd.offClose 卸载失败");
                        console.error(e);
                    }
                    videoAd.closeHandler = (res) => {
                        // 用户点击了【关闭广告】按钮
                        if (res && res.isEnded || res === undefined) {
                            // 正常播放结束，可以下发奖励
                            console.log("播放完毕");
                            tt.authorize({
                                scope: "scope.album",
                                success: (res) => {
           
                                        tt.downloadFile({
                                            url: "",
                                            header: {
                                                "content-type": "application/json",
                                            },
                                            success: (res) => {
                                                let filePath = res.tempFilePath;
                                                tt.saveImageToPhotosAlbum({
                                                    filePath, // 暂不支持网络图片/本地图片地址，需与tt.downloadFile一起使用
                                                    success: (res) => {
                                                     tt.$msg("none", "壁纸已保存到相册")
                                                       
                                                    },
                                                    fail: (err) => {}
                                                });
                                            },
                                            fail: (err) => {
                                                console.log(err);
                                            },
                                        });
                                     
                                },
                                fail: (err) => {
                                    console.log("authorize fail", err);
                                    tt.$msg("none", "请打开相册权限")
                                },
                            });

                        } else {
                            //提前关闭小程序
                            tt.$msg("none", "您看完广告后才能下载~")
                        }
                    };
                    videoAd.onClose(videoAd.closeHandler);
                }
    },

第四步，在点击的时侯播放广告

//超清下载
    submit() {
        // 在合适的位置打开广告
            tt.authorize({
                scope: "scope.album",
                success: (res) => {
                    videoAd.show().catch(err => {
                        // 失败重试
                        videoAd.load()
                            .then(() => videoAd.show())
                    })
                },
                fail: (err) => {
                    tt.$msg("none", "请打开相册权限")
                },
            });
        
    },

以上相关操作代码就结束了，如果是微信小程序，则将 tt换成 wx即可，两者其实都是相通的。