如何在录制视频时接收字节

Question

我正在开发iphone视频应用程序，因为我想在用户录制视频本身时获取磁盘占用的字节数。

- (void)imagePickerController:(UIImagePickerController *)picker 
didFinishPickingMediaWithInfo:(NSDictionary *)info;

用户完成挑选后调用此方法。有任何方法

Answer 1

UIImage *img = [UIImage imageNamed:@"sample.png"];
 NSData *imgData = UIImageJPEGRepresentation(img, 0); 
 NSLog(@"Size of Image(bytes):%d",[imgData length]);

Answer 2

NSData *data = [info objectForKey: UIImagePickerControllerMediaMetadata];