Default share option in iOS : UIActivityViewController

- (IBAction)btnSharePressed:(id)sender {
    
    //filePath must NSURL object and looking like this => file:///Users/simon/Library/Application%20Support/iPhone%20Simulator/7.0.3/Applications/A5321493-318A-4A3B-8B37-E56B8B4405FC/AirDropDemo.app/ios-game-kit-sample.pdf
    
    NSString *filePath = [NSString stringWithFormat:@"file://%@",[self getFilePath:@"ios-game-kit-sample.pdf"]];
    
    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[filePath] applicationActivities:nil];
                       
    [self presentViewController:activityViewController animated:YES completion:nil];
    
}

Above code share the document with all available share option, if we want to remove some option use below code.

- (IBAction)btnSharePressed:(id)sender {
    
    //filePath must NSURL object and looking like this => file:///Users/simon/Library/Application%20Support/iPhone%20Simulator/7.0.3/Applications/A5321493-318A-4A3B-8B37-E56B8B4405FC/AirDropDemo.app/ios-game-kit-sample.pdf
    
    NSString *filePath = [NSString stringWithFormat:@"file://%@",[self getFilePath:@"ios-game-kit-sample.pdf"]];
    
    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[filePath] applicationActivities:nil];
    
    // Exclude all activities except AirDrop.
    NSArray *excludedActivities = @[UIActivityTypePostToTwitter, UIActivityTypePostToFacebook,
                                    UIActivityTypePostToWeibo, UIActivityTypeMessage, UIActivityTypeMail,
                                    UIActivityTypePrint,UIActivityTypeCopyToPasteboard,
                                    UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll,
                                    UIActivityTypeAddToReadingList, UIActivityTypePostToFlickr,
                                    UIActivityTypePostToVimeo,UIActivityTypePostToTencentWeibo];
    
    activityViewController.excludedActivityTypes = excludedActivities;
                       
    [self presentViewController:activityViewController animated:YES completion:nil];
    
}

for image share use this option

- (IBAction)btnShareApp:(id)sender {
    UIImage *shareImage = imgView.image;
    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[shareImage] applicationActivities:nil];
    
    [self presentViewController:activityViewController animated:YES completion:nil];
}