上传图像时内存不断增加

Question

我在服务器上上传多张图片。当我上传大约100张图像时，内存上升到大约300 MB，即使在上传完成后，内存也不会自由。我在上传图片时使用NSData，我的图片存储在sqlite db中。 如何减少内存峰值？

这是我的一段代码

 - (void)_startUpload:(NSString *)filePath  {

        NSLog(@"sdf  filepath :   %@",filePath);
        arr=[ImagesAccount getAllMovies];

        for (int j=0; j<ma.count; j++) {

            NSLog(@"sdf  in d _startUpload ma[j] :   %@",ma[j]);
            [self startupuploader:ma[j]];
        }
    }


-(void)startupuploader:(NSString *)filePath{
        @autoreleasepool {

        image=YES;

        NSLog(@"filepath in flicke : %@",filePath);

        // JPEGData = [[[NSData alloc]initWithContentsOfFile:filePath]autorelease];
        // NSLog(@"JPEGData in flicke : %@",JPEGData);
        // NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:filePath]];
        // NSLog(@"data in flicke : %@",data);

        snapPictureButton.enabled = NO;

        snapPictureDescriptionLabel.text = @"Uploading";

        self.flickrRequest.sessionInfo = kUploadImageStep;

        self.authorizeDescriptionLabel = nil;

        self.snapPictureDescriptionLabel=nil;

        self.authorizeButton=nil;

        self.snapPictureButton=nil;

        self.albumName=nil;

        self.imageView=nil;

        self.albumhome=nil;

        arrs=nil;

        [self.flickrRequest uploadImageStream:[NSInputStream inputStreamWithFileAtPath:filePath] suggestedFilename:@"Flickr" MIMEType:@"image/jpeg" arguments:[NSDictionary dictionaryWithObjectsAndKeys:@"0", @"is_public", nil]];

        [UIApplication sharedApplication].idleTimerDisabled = YES;

        [self updateUserInterface:nil];

        }

    }