if i can share content of other app to my app - ios

using uiactivity ,i can share content of my app to Facebook,twitter,email.
UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems
applicationActivities:activities];
so i want to add my custom uiactivity,when user using UIActivityViewController at other app,my app can appear on the UIActivityViewController like Facebook,so it can share content to my app?
if apple allow me to do this,if yes,how to do?can you give some advice
edit: i think this is not repeat question。my question: i want to my app like Facebook,twitter can show at other developer app,if it used UIActivityViewController. if you cannot understand my question,you can ask me,i can give detail describe.sorry for my english

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I am trying to show UIActivityViewController inside iMessage app. In both modes (compact/expanded) it is not shown properly/fully. See attached images. Is there any way to correct this?

iOS Quick Action Share with UIActivityViewController

Im struggling with iOS 3d touch / quick actions. I'm trying to implement a Quick Action Share button similar to Hangouts App using UIActivityViewController.
Following iOS dev guildes I have almost managed to achieve the goal but my application is starting with the splash & home screen right after performing the 3d touch click while the Hangouts app presents the UIActivityViewController without showing any viewcontroller beneath it.
- (void)handleShortcutItem:(UIApplicationShortcutItem *)item {
NSString *string = #"Share String";
NSURL *URL = [NSURL URLWithString:#"some URL"];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:#[string, URL] applicationActivities:nil];
[self.window.rootViewController presentViewController:activityViewController animated:YES completion:nil];
Does anyone know how to launch those quick actions without launching the whole app?
The shortcut item is added for each and every app downloaded from the App Store (at least on my device running iOS 10). There's no need for you to implement anything!
Note that TestFlight builds will have a "Send Feedback" shortcut option instead of "Share ___"

Sharing UIImage to UIActivityViewController Twitter/Facebook very slow to show dialog

I have an image I took from the camera and saved to the /tmp folder.
When I add this image to the activityItems of an UIActivityViewController, and then press to share with either Twitter or Facebook, I have to wait up to 20 seconds for the share dialog to appear.
Note that I'm referring to the actual "Post" dialog that appears for Twitter/Facebook, not the native share popup that spawns it.
When I share the same image from the Photos app, it appears instantly.
At first I was thinking the Photos app was resizing the image, as a smaller image appears more quickly, but than I discovered that when I share the same image directly to Twitter or Facebook with SLComposeViewController, it appears (almost) instantly.
Assuming it's something I'm doing incorrectly in code, here is what results in the glacially slow dialog appearance:
NSArray *items = #[#"foo", [UIImage imageWithContentsOfFile:#"valid path to test image"]];
UIActivityViewController *vc = [[UIActivityViewController alloc]
initWithActivityItems:items applicationActivities:nil];
[self presentViewController:vc animated:YES completion:nil];
Here's what works almost instantly:
SLComposeViewController *controller = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
[controller setInitialText:#"foo"];
[controller addImage:[UIImage imageWithContentsOfFile:#"valid path to test image"]];
[self presentViewController:controller animated:YES completion:Nil];
For what it's worth, I've also tried excluding the other share types (I read that in the past AirDrop caused issues), as well as wrapping the block to ensure I was executing on the main thread.
I assume I'm doing something wrong?
If I'm not, and these two other methods are in fact resizing the image, is there some documentation I'm missing that provides guidance as to how much resizing to do?
** Edit: additional testing seems to show this problem is unique to iOS8, as I did not experience it on an older iOS7 device.
Thanks
We've seen 4–20 seconds delay before the share dialog appear as well!.
I've fixed it by creating custom UIActivity items for Twitter and Facebook which simply calls SLComposeViewController inside performActivity method.
Seems much faster.

Share a video to Vimeo on iOS 7

How does one share a video to Vimeo using the added support to the social framework on iOS 7?
This seems pretty new, haven't found any info on this.
This is what's called UIActivityViewController, available on iOS 6 and later. Based on initWithActivityItems it automatically decides what type of content you want to share and handles the rest. Pretty cool when used properly.
- (IBAction)showShareSheet:(id)sender {
NSArray *objects = #[moviePlayer.contentURL];
UIActivityViewController *activity = [[UIActivityViewController alloc]
initWithActivityItems:objects
applicationActivities:nil];
[self presentViewController:activity animated:YES completion:nil];
}

ios implement video share which loacate in Photos

I use UIActivityViewController to implement eMail and Message.
NSArray *activityItems;
activityItems = #[[self.mURL path],self.mURL];
UIActivityViewController *activityController =
[[UIActivityViewController alloc] initWithActivityItems:activityItems
applicationActivities:nil];
[self presentViewController:activityController
animated:YES completion:nil];
But how can I implement below view, especially youtube, youku, and tudou on iOS6?
Your app will have to provide a custom UIActivity that handles URLs and file paths. For an example, see my book: http://www.apeth.com/iOSBook/ch26.html#_activity_view
Look about halfway through that section, where I create a custom activity called Be Cool.
What you will actually do with the URL (i.e. how you are going to get this video sent to YouTube, or whatever it is you are trying to do) is entirely up to you.

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