Typical usage will look something like this:
NSURL *urlToShare = [NSURL URLWithString:@"https://github.com/alextrob/ARChromeActivity"];
NSArray *activityItems = [NSArray arrayWithObject:urlToShare];
ARChromeActivity *chromeActivity = [[ARChromeActivity alloc] init];
NSArray *applicationActivities = [NSArray arrayWithObject:chromeActivity];
UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:applicationActivities];
[self presentViewController:activityVC animated:YES completion:nil];
It also supports x-callback-url by either initializing with initWithCallbackURL:, or setting the callbackURL property. Note that if you set a callbackURL under iOS 9, you will be required to add "googlechrome-x-callback" to your Info.plist under LSApplicationQueriesSchemes.
Have a look at the demo app!
