使用UIActivityViewController分享视频

系统提供的UIActivityViewController可以方便的分享文字、图片、视频等类型，开发者甚至可以自定义分享文件的图标，下面是分享视频的示例。

/**
  确保shareURL正确，video来源可以是bundle、document file、asset-library
*/
- (void)shareVideo {
NSString *videoPath = @"xxx/xxx/test.mp4";
NSURL *shareURL = [NSURL fileURLWithPath:videoPath];
NSString *shareMessage = @"Hey! Here is an interesting video. #Tag";
NSArray *shareItems = @[shareMessage, shareURL];

UIActivityViewController *controller = [[UIActivityViewController alloc] initWithActivityItems:shareItems applicationActivities:nil];
[self presentViewController:controller animated:YES completion:nil];
}