NSURLSesion 上传视频 展示进度条

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//自己处理好自己的视频，压缩后生成data

- (void)uploadVideos:(NSArray *)videos andSource:(NSString *)source andUserId:(NSString *)userId andTitle:(NSString *)title andPart:(NSString *)part{

    mytitle = [NSString stringWithString:title];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"……"］]cachePolicy:1 timeoutInterval:-1];

    NSLog(@"request %@",request);

    request.HTTPMethod = @"post";

    // boundary可随意命名

    NSString *boundary = @"yang";

    // 拼接请求头

    [request setValue:[NSString stringWithFormat:@"multipart/form-data;charset=utf-8;boundary=%@",boundary] forHTTPHeaderField:@"Content-Type"];

    // 创建可变data 后面一样拼接

    NSMutableData *myData = [NSMutableData data];

    NSString *str = [NSString string];

    NSString *name = @"userfile";

    // 上传后文件的名字

    NSString *filename = @"1.mp4";

 　 //这个地方是关键，不能随意命名，很多地方缺少了了\n  \r之类，若果格式命名不对   服务器可能会收到上传的文件

    str = [NSString stringWithFormat:@"--%@\r\nContent-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\nContent-Type: %@\r\n\r\n",boundary,name,filename,@"video/quicktime"];

    [myData appendData:[str dataUsingEncoding:NSUTF8StringEncoding]];

    [myData appendData:[NSData dataWithData:videos[0]]];

    str = [NSString stringWithFormat:@"\r\n--%@--",boundary];

    [myData appendData:[str dataUsingEncoding:NSUTF8StringEncoding]];

    request.HTTPBody = myData;

    //执行上传

    [[self.session uploadTaskWithRequest:request fromData:myData]resume];

    //上传后监听上传进度

    [self addProgressView];

}

// 懒加载   一个session

- (NSURLSession *)session

{

    if(_session == nil)

    {

        NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];

        _session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:nil];

    }

    return _session;

}

#pragma mark - 检测上传进度

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task

   didSendBodyData:(int64_t)bytesSent

    totalBytesSent:(int64_t)totalBytesSent

totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend

{

    _progress.hidden = NO;

    showProgress = (float)totalBytesSent / totalBytesExpectedToSend;

    NSLog(@"%f %@", showProgress, [NSThread currentThread]);

    //UI主线程显示progress

    [self performSelectorOnMainThread:@selector(showProgress) withObject:nil waitUntilDone:YES];

}

NSURLSesion 上传视频 展示进度条

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原文地址：http://www.cnblogs.com/yangxiaobei/p/5271689.html