WQDownLoad

Effect

Usage

1. AppDelegate 里 在didFinishLaunchingWithOptions里实现:

[[WQDownLoadManager shareInstance] applicationDidFinishLaunching];

2. 下载单个信息:

WQDownLoadModel *model = [[WQDownLoadModel alloc] init];
model.video_title = self.courseInfo.title;
model.video_id = self.courseInfo.video_id;
model.chapter_id = self.courseInfo.lessonID;
model.course_id = self.courseInfo.courseId;
model.user_id = @"userid12223";
model.video_parameter = @{};
model.create_time = [NSDate date];
model.cover_img_url = self.courseInfo.courseImgUrl;
model.course_name = self.courseInfo.courseTitle;
[[WQDownLoadManager shareInstance] addDownloadTaskWithTask:model errorHandle:^(BOOL success, NSString * _Nonnull errorMsg) {
    if (success) {
        [MBProgressHUD showSuccess:@"加入下载成功!" toView:self.viewController.view];
    }else {
        [MBProgressHUD showError:errorMsg toView:self.viewController.view];
    }
}];

3. 配置多选下载数据

WQDownLoadChooseController *vc = [[WQDownLoadChooseController alloc] init];
NSString *sectionKey = self.couseInfo.IndexArr[section];
NSArray *arr = self.couseInfo.courses[sectionKey];
NSMutableArray *marr = @[].mutableCopy;
for (NSString *rowkey in arr) {
    WQCourseListInfoModel *lessionInfo = self.couseInfo.courseListPool[rowkey];
    WQDownLoadModel *model = [[WQDownLoadModel alloc] init];
    model.video_title = lessionInfo.title;
    model.video_id = lessionInfo.video_id;
    model.chapter_id = lessionInfo.lessonID;
    model.course_id = self.couseInfo.course_basic_info.global_id;
    model.user_id = @"userid12223";
    model.video_parameter = @{};
    model.create_time = [NSDate date];
    model.cover_img_url = self.couseInfo.course_basic_info.img_src;
    model.course_name = self.couseInfo.course_basic_info.title;
    [marr addObject:model];
}
vc.datas = marr.copy;
vc.title = sectionModel.title;
[self.viewController.navigationController pushViewController:vc animated:YES];

4. WQDownLoadManagerDelegate 下载进度及情况回调 添加代理:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    
    [[WQDownLoadManager shareInstance] addListener:self];
    [self reloadData];
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    [[WQDownLoadManager shareInstance] removeListener:self];
}

代理方法:

- (void)downloadManagerDidPause:(WQDownLoadModel *)downloadTaskModel {
    [self reloadCellWithVideo:downloadTaskModel];
}

- (void)downloadManagerDidStart:(WQDownLoadModel *)downloadTaskModel {
    [self reloadCellWithVideo:downloadTaskModel];
}

- (void)downloadManagerDidReceiveBytes:(WQDownLoadModel *)downloadTaskModel {
    [self reloadCellWithVideo:downloadTaskModel];
}

- (void)downloadManagerDidFinish:(WQDownLoadModel *)downloadTaskModel {
    [self reloadCellWithVideo:downloadTaskModel];
    [self reloadData];
}

- (void)downloadManagerDidError:(WQDownLoadModel *)downloadTaskModel Error:(NSError *)error {
    [self reloadCellWithVideo:downloadTaskModel];
}

- (void)reloadCellWithVideo:(WQDownLoadModel *)video {
    WQDownLoadCell *cell = [self.tableView cellForRowAtIndexPath:self.videohash[video.engineKey]];
    cell.video = video;
}

cellHash配置,key为engineKey,value为index,便于reloadCell UI,如果tableView数据刷新,要再次重新配置

for (int i = 0; i < _datas.count; i++) {
    WQDownLoadModel *video = _datas[i];
    [_videohash setObject:[NSIndexPath indexPathForRow:i inSection:0] forKey:video.engineKey];
}

Architecture

• 视频配套信息存储基于FMDB,
• 下载实现基于NSURLSessionDataTask
• audio airplay and picture in picture后台播放无声音频

WQDownLoadModel

为FMDB实体模型类,包含数据库要存储的数据以及部分getter属性,video_parameter参数用于扩展其他参数

WQDownLoadAudioPlayer

后台播放无声音频的管理者

• 内部观察了DidEnterBackground和WillEnterForeground来控制播放暂停

WQDownLoadModelDBManager

• 数据库管理者
• 封装了一些model更新
• 下载数据获取

WQDownLoadSessionEngine

下载引擎,核心类

• video下载视频的model信息
• dataTask(task)下载任务dataTask(downloadTask)
• 外部公开 开始,暂停,取消 三个操作.以及供WQDownLoadSessionManager调用的下载进度和状态
• 内部操作数据库的下载状态,以及将下载信息回调到WQDownLoadManager

WQDownLoadSessionManager

NSURLSession管理者

• 创建task
• 将SessionDelegate 分发给各个单独的Engine

WQDownLoadManager

任务调度,进度回调,核心类

• 添加listener并将进度回调给listener
• 任务管理(添加,删除,暂停)的单个操作或多个操作
• applicationDidFinishLaunching 进入app下载未完成的任务

TODO

• downloadTask下载时数据库操作不太理想,做了一半换成了DataTask
• didCompleteWithError之后新建一个task可能会导致无法暂停
• 目前项目没有直接提供下载Url,但是下载时请求的Url是有时效性的,url过期为处理(与后台统一code重新请求)

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Requirements

Installation

WQDownLoad is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'WQDownLoad'

Author

hapiii, 869932084@qq.com

License

WQDownLoad is available under the MIT license. See the LICENSE file for more info.