从服务器URL下载视频速度更快

Question

我正在开发一个应用程序，其中我正在从我们的服务器下载视频并从中进行实时照片。我使用以下代码从URL下载。但是，使用afnetworking的downloadTaskWithRequest花费了很多时间。有什么方法可以更快地完成此过程？

if (![[NSFileManager defaultManager] fileExistsAtPath:fileVdPath])
        {
            NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
            AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
            NSURL *URL = VideoUrl;
            NSURLRequest *request = [NSURLRequest requestWithURL:URL];
            NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
                NSLog(@"vdodownload");
                NSURL *urlFilepath = [NSURL fileURLWithPath:fileVdPath];
                return urlFilepath;
            } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
                if ([[NSFileManager defaultManager] fileExistsAtPath:fileImgPath])
                {
                    NSURL *photopathURL = [[NSURL alloc] initFileURLWithPath:fileImgPath];
                    NSURL *videoPathURL = [[NSURL alloc] initFileURLWithPath:fileVdPath];
                    NSLog(@"Video%d",index);
                    [self CreateLivePhoto:photopathURL videoUrl:videoPathURL index:index];
                }
            }];
            [downloadTask resume];
        }

Answer 1

dataWithContentsOfURL可能更快

示例用法：(不要忘记将 NSPhotoLibraryAddUsageDescription添加到您的info.plist中，以便将摄像机滚动零件保存到可行；您可以在验证速度更改(如果存在的话(后根据需要将其删除并使用它(

NSData *urlData = [NSData dataWithContentsOfURL:url];
NSString  *documentsDirectory ;
if ( urlData )
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    documentsDirectory = [paths objectAtIndex:0];
    NSString  *filePath = [NSString stringWithFormat:@"%@/%@", documentsDirectory,@"videoName.mp4"];
    [urlData writeToFile:filePath atomically:YES];
    UISaveVideoAtPathToSavedPhotosAlbum(filePath, nil, nil, nil);//add NSPhotoLibraryAddUsageDescription info.plist
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Video Grabbed!"
                                                    message:@"We grabbed this video and saved it to your camera roll, feel free to use now!."
                                                   delegate:self
                                          cancelButtonTitle:@"Thanks"
                                          otherButtonTitles:nil];
    [alert show];
}