第五十三篇、OC利用AFN上传视频到服务器

整体思路已经清楚，拿到视频资源，先转为mp4，写进沙盒，然后上传，上传成功后删除沙盒中的文件。

本地拍摄的视频，上传到服务器：

//视频转换为MP4
     //转码操作...
     _hud.mode = MBProgressHUDModeIndeterminate;
     _hud.labelText = @"转码中...";
    AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:_filePathURL  options:nil];
     NSDateFormatter* formater = [[NSDateFormatter alloc] init];
     [formater setDateFormat:@"yyyyMMddHHmmss"];
    _fileName = [NSString stringWithFormat:@"output-%@.mp4",[formater stringFromDate:[NSDate date]]];
    _outfilePath = [NSHomeDirectory() stringByAppendingFormat:@"/Documents/%@", _fileName];
    NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];

    if ([compatiblePresets containsObject:AVAssetExportPresetMediumQuality])
    {
        MyLog(@"outPath = %@",_outfilePath);
        AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]initWithAsset:avAsset presetName:AVAssetExportPresetMediumQuality];
        exportSession.outputURL = [NSURL fileURLWithPath:_outfilePath];
        exportSession.outputFileType = AVFileTypeMPEG4;
        [exportSession exportAsynchronouslyWithCompletionHandler:^{
            if ([exportSession status] == AVAssetExportSessionStatusCompleted) {
                MyLog(@"AVAssetExportSessionStatusCompleted---转换成功");
                _filePath = _outfilePath;
                _filePathURL = [NSURL URLWithString:[NSString stringWithFormat:@"file://%@",_outfilePath]];
                 MyLog(@"转换完成_filePath = %@\n_filePathURL = %@",_filePath,_filePathURL);
                //获取大小和长度
                [self SetViewText];
                [self uploadNetWorkWithParam:@{@"contenttype":@"application/octet-stream",@"discription":description}];
            }else{
                MyLog(@"转换失败,值为:%li,可能的原因:%@",(long)[exportSession status],[[exportSession error] localizedDescription]);
                [_hud hide:YES];
                [MyHelper showAlertWith:nil txt:@"转换失败,请重试"];
            }
        }];

    }

#pragma mark - 开始上传

-(void)uploadNetWorkWithParam:(NSDictionary*)dict
{
     MyLog(@"开始上传_filePath = %@\n_filePathURL = %@",_filePath,_filePathURL);
AFHTTPRequestSerializer *ser=[[AFHTTPRequestSerializer alloc]init];
NSMutableURLRequest *request =
[ser multipartFormRequestWithMethod:@"POST"
                          URLString:[NSString stringWithFormat:@"%@%@",kBaseUrl,kVideoUploadUrl]
                         parameters:@{@"path":@"show",@"key":_key,@"discription":dict[@"discription"],@"isimage":@(_isImage)}
          constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
                  [formData appendPartWithFileURL:_filePathURL name:@"file" fileName:_fileName mimeType:dict[@"contenttype"] error:nil];
              if (!_isImage) {
   [formData appendPartWithFileURL:_path2Url name:@"tmp" fileName:@"tmp.PNG" mimeType:@"image/png" error:nil];
              }
          } error:nil];
//@"image/png"   @"application/octet-stream"  mimeType
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
NSProgress *progress = nil;
NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithStreamedRequest:request progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
    if (error) {
         MyLog(@"request = %@", request );
         MyLog(@"response = %@", response );
        MyLog(@"Error: %@", error );
        [_hud hide:YES];
        CXAlertView *alert=[[CXAlertView alloc]initWithTitle:NSLocalizedString(@"Warning", nil)
                                                     message:NSLocalizedString(@"Upload Failed",nil)
                                           cancelButtonTitle:NSLocalizedString(@"Iknow", nil)];
        alert.showBlurBackground = NO;
        [alert show];
    } else {
        MyLog(@"%@ %@", response, responseObject);
        NSDictionary *backDict=(NSDictionary *)responseObject;
        if ([backDict[@"success"] boolValue] != NO) {
            _hud.labelText = NSLocalizedString(@"Updating", nil);
            [self UpdateResxDateWithDict:backDict discription:dict[@"discription"]];
            [_hud hide:YES];
        }else{
            [_hud hide:YES];
            [MyHelper showAlertWith:nil txt:backDict[@"msg"]];
        }
    }
    [progress removeObserver:self
                  forKeyPath:@"fractionCompleted"
                     context:NULL];
}];
[progress addObserver:self
           forKeyPath:@"fractionCompleted"
              options:NSKeyValueObservingOptionNew
              context:NULL];
[progress setUserInfoObject:@"someThing" forKey:@"Y.X."];
[uploadTask resume];

}

删除沙盒中的视频：

#pragma mark - 清除documents中的视频文件
-(void)ClearMovieFromDoucments{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSArray *contents = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:NULL];
NSEnumerator *e = [contents objectEnumerator];
NSString *filename;
while ((filename = [e nextObject])) {
    MyLog(@"%@",filename);
    if ([filename isEqualToString:@"tmp.PNG"]) {
        MyLog(@"删除%@",filename);
        [fileManager removeItemAtPath:[documentsDirectory stringByAppendingPathComponent:filename] error:NULL];
        continue;
    }
    if ([[[filename pathExtension] lowercaseString] isEqualToString:@"mp4"]||
        [[[filename pathExtension] lowercaseString] isEqualToString:@"mov"]||
        [[[filename pathExtension] lowercaseString] isEqualToString:@"png"]) {
        MyLog(@"删除%@",filename);
        [fileManager removeItemAtPath:[documentsDirectory stringByAppendingPathComponent:filename] error:NULL];
    }
}
}