NSString* someText = @"Sent from my app!";
UIImage* image = imageview.image;
NSArray* dataToShare = @[someText, image];  //Array of sharable stuff.

UIActivityViewController* activityViewController = 
        [[UIActivityViewController alloc] initWithActivityItems:dataToShare 
        applicationActivities:nil];
[self presentViewController:activityViewController animated:YES completion:^{}];