AFNetworking 3.0 视频下载 NSOperationQueue 多视频下载
创建一对 VideoOpration 继承于NSOperation 比较简单 作为参考
.h 文件
@interface VideoOpration : NSOperation
@property (nonatomic, strong) NSString *videoUrl; 视频地址
@property (nonatomic, strong) NSString *videoPath; 本地存储地址
@property (nonatomic, strong) NSString *videoPlist; 存放下载列表地址
@property (nonatomic, strong) NSString *videoName; 视频的名字
@property (nonatomic, assign) float progress; 下载进度
- (void)pauseAction; 下载暂停
- (void)continiueAction; 下载继续
@end
@interface VideoOpration()
@property (nonatomic, strong) NSURLSessionDownloadTask *downloadTask;
@end
@implementation VideoOpration
- (void)main{
//网络视频地址
NSURL *URL = [NSURL URLWithString:self.videoUrl];
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
//下载Task操作
self.downloadTask = [manager downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) {
//downloadProgress.totalUnitCount; 文件的总大小
//downloadProgress.completedUnitCount; 当前已经下载的大小
// 回到主队列刷新UI
dispatch_async(dispatch_get_main_queue(), ^{
self.progress = 1.0 * downloadProgress.completedUnitCount / downloadProgress.totalUnitCount;
});
} destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
//- block的返回值, 要求返回一个URL, 返回的这个URL就是文件的位置的路径
return [NSURL fileURLWithPath:self.videoPath];
} completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
// 每次APP启动沙盒路径都会改变，，只存储视频名字，，每次取出时获取沙盒路径进行拼接得到视频路径
NSMutableArray *arr = [NSKeyedUnarchiver unarchiveObjectWithFile:self.videoPlist];
if (arr.count == 0) {
arr = [NSMutableArray arrayWithObject:self.videoName];
}else{
[arr addObject:self.videoName];
}
[NSKeyedArchiver archiveRootObject:arr toFile:self.videoPlist];
}];
// 开始下载 需要有这句话 没有的话不开始下载
[self.downloadTask resume];
}
- (void)pauseAction{
[self.downloadTask suspend]; // 暂停下载
}
- (void)continiueAction{
[self.downloadTask resume]; // 继续下载
}
创建一对 视频下载工具 DownLoadTool.h 文件
@interface DownLoadTool : NSObject
/// 下载视频的接口
- (void)downLoadWithUrl:(NSString *)videoUrl videoPath:(NSString *)videoPath videoPlist:(NSString *)videoPlist videoName:(NSString *)videoName;
@end
.m 文件
- (void)downLoadWithUrl:(NSString *)videoUrl videoPath:(NSString *)videoPath videoPlist:(NSString *)videoPlist videoName:(NSString *)videoName{
VideoOpration *opration = [[VideoOpration alloc] init]; /// 创建下载操作线程
// 传递关键信息
opration.videoUrl = videoUrl;
opration.videoName = videoName;
opration.videoPath = videoPath;
opration.videoPlist = videoPlist;
AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
[delegate.downLoadQueue addOperation:opration]; /// 将下载线程加进队列里
[delegate.uploadArray addObject:opration]; /// 将队列加进全局数组
}
在下载列表页 创建tableView 创建一个获取下载进度的计时器
[NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(timerAction) userInfo:nil repeats:YES];
- (void)timerAction{
[self.listTableView reloadData];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *reuse = @"reuse";
DownLoadTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuse];
if (!cell) {
cell = [[DownLoadTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuse];
}
AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
VideoOpration *opration = delegate.uploadArray[indexPath.row];
[cell refreshui:opration];
return cell;
}
cell 中
- (void)refreshui:(VideoOpration *)opration{
self.videoOption = opration;
self.progressLabel.text = [NSString stringWithFormat:@"%f",opration.progress];
// NSLog(@"-=-=-=-=%f",opration.progress);
}
- (void)pauseAction{
if (self.play == YES) {
[self.videoOption pauseAction]; 暂停点击实现
}else{
[self.videoOption continiueAction]; 继续点击实现
}
self.play = !self.play;
}