How can I create a custom UIActivity in iOS?

First, create the files. I chose to name mine ActivityViewCustomActivity

Make ActivityViewCustomActivity.h look like this:

#import <UIKit/UIKit.h>@interface ActivityViewCustomActivity : UIActivity@end

Make ActivityViewCustomActivity.m look like this:

#import "ActivityViewCustomActivity.h"@implementation ActivityViewCustomActivity- (NSString *)activityType{    return @"yourappname.Review.App";}- (NSString *)activityTitle{    return @"Review App";}- (UIImage *)activityImage{      // Note: These images need to have a transparent background and I recommend these sizes:    // iPadShare@2x should be 126 px, iPadShare should be 53 px, iPhoneShare@2x should be 100     // px, and iPhoneShare should be 50 px. I found these sizes to work for what I was making.    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)    {        return [UIImage imageNamed:@"iPadShare.png"];    }    else    {        return [UIImage imageNamed:@"iPhoneShare.png"];    }}- (BOOL)canPerformWithActivityItems:(NSArray *)activityItems{    NSLog(@"%s", __FUNCTION__);    return YES;}- (void)prepareWithActivityItems:(NSArray *)activityItems{    NSLog(@"%s",__FUNCTION__);}- (UIViewController *)activityViewController{    NSLog(@"%s",__FUNCTION__);    return nil;}- (void)performActivity{       // This is where you can do anything you want, and is the whole reason for creating a custom     // UIActivity    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=yourappid"]];    [self activityDidFinish:YES];}@end

This is what my image looked like:Here is the .PSD I made: -- malicious link removed --And here is the original 250 px .png http://i.imgur.com/pGWVj.png

Now in your view controller do this:

#import "ActivityViewCustomActivity.h"

And now wherever you want to display your UIActivityViewController:

   NSString *textItem = @"Check out the yourAppNameHere app: itunes http link to your app here";   UIImage *imageToShare = [UIImage imageNamed:@"anyImage.png"];   NSArray *items = [NSArray arrayWithObjects:textItem,imageToShare,nil];   ActivityViewCustomActivity *aVCA = [[ActivityViewCustomActivity alloc]init];   UIActivityViewController *activityVC =   [[UIActivityViewController alloc] initWithActivityItems:items                                                  applicationActivities:[NSArray arrayWithObject:aVCA]];   activityVC.excludedActivityTypes = @[UIActivityTypePostToWeibo, UIActivityTypeAssignToContact, UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeSaveToCameraRoll];   activityVC.completionHandler = ^(NSString *activityType, BOOL completed)   {        NSLog(@"ActivityType: %@", activityType);        NSLog(@"Completed: %i", completed);   };   if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)   {      self.popoverController = [[UIPopoverController alloc] initWithContentViewController:activityVC];      CGRect rect = [[UIScreen mainScreen] bounds];      [self.popoverController                     presentPopoverFromRect:rect inView:self.view                     permittedArrowDirections:0                     animated:YES];   }   else   {       [self presentViewController:activityVC animated:YES completion:nil];   }

Here is my Swift Version - I needed multiple custom actions so I created this class. No need for delegates or protocols.

1. Add the custom Class

class ActivityViewCustomActivity: UIActivity {    var customActivityType = ""    var activityName = ""    var activityImageName = ""    var customActionWhenTapped:( (Void)-> Void)!    init(title: String, imageName:String, performAction: (() -> ()) ) {        self.activityName = title        self.activityImageName = imageName        self.customActivityType = "Action \(title)"        self.customActionWhenTapped = performAction        super.init()    }    override func activityType() -> String? {        return customActivityType    }    override func activityTitle() -> String? {        return activityName    }    override func activityImage() -> UIImage? {        return UIImage(named: activityImageName)    }    override func canPerformWithActivityItems(activityItems: [AnyObject]) -> Bool {        return true    }    override func prepareWithActivityItems(activityItems: [AnyObject]) {        // nothing to prepare    }    override func activityViewController() -> UIViewController? {        return nil    }    override func performActivity() {        customActionWhenTapped()    }}

2 Use in your View Controller

I've attached it to a UIBarButtonItem, which calls the the following

@IBAction func actionButtonPressed(sender: UIBarButtonItem) {    var sharingItems = [AnyObject]() // nothing to share...    let myCustomActivity = ActivityViewCustomActivity(title: "Mark Selected", imageName: "removePin") {        println("Do something")    }    let anotherCustomActivity = ActivityViewCustomActivity(title: "Reset All", imageName: "reload") {        println("Do something else")    }    let activityViewController = UIActivityViewController(activityItems:sharingItems, applicationActivities:[myCustomActivity, anotherCustomActivity])    activityViewController.excludedActivityTypes = [UIActivityTypeMail, UIActivityTypeAirDrop, UIActivityTypeMessage, UIActivityTypeAssignToContact, UIActivityTypePostToFacebook, UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeSaveToCameraRoll]    activityViewController.popoverPresentationController?.barButtonItem = sender    self.presentViewController(activityViewController, animated: true, completion: nil)}

My Swift 3 Implementation based off of DogCoffee's:

class ActivityViewCustomActivity: UIActivity {    // MARK: Properties    var customActivityType: UIActivityType    var activityName: String    var activityImageName: String    var customActionWhenTapped: () -> Void    // MARK: Initializer    init(title: String, imageName: String, performAction: @escaping () -> Void) {        self.activityName = title        self.activityImageName = imageName        self.customActivityType = UIActivityType(rawValue: "Action \(title)")        self.customActionWhenTapped = performAction        super.init()    }    // MARK: Overrides    override var activityType: UIActivityType? {        return customActivityType    }    override var activityTitle: String? {        return activityName    }    override class var activityCategory: UIActivityCategory {        return .share    }    override var activityImage: UIImage? {        return UIImage(named: activityImageName)    }    override func canPerform(withActivityItems activityItems: [Any]) -> Bool {        return true    }    override func prepare(withActivityItems activityItems: [Any]) {        // Nothing to prepare    }    override func perform() {        customActionWhenTapped()    }}