3D Touch Home Shortcuts In Obj-C

Question

All of my apps are currently written in Obj-C. The link https://developer.apple.com/library/content/samplecode/ApplicationShortcuts/Introduction/Intro.html#//apple_ref/doc/uid/

Answer 1

There are two states from where the user can open the app through Quick Actions.

TL;DR You are always doing the same thing regardless of the state in which the app is when the quick action is done, that's why you only need to override application:performActionForShortcutItem:completionHandler: So if you wanted to do different things, then you would want to handle them in the two places, if not then just the overridden is enough.

• One is if the app is killed or not running in background where we get the shortcut info on launch.

• The other is if the app is running in background where we get the shortcut info on the new app delegate method.

To handle these Quick Action shortcuts when in background you need to override this method on App Delegate:

- (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler

And for not running in background (killed) on your

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

or

-(BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:(NSDictionary *)launchOptions

you should check if the app was launched by a Quick Action:

UIApplicationShortcutItem *shortcutItem = [launchOptions objectForKey:UIApplicationLaunchOptionsShortcutItemKey];

(Link to related Apple Documentation) Quote from the Official Apple Docs

It’s your responsibility to ensure the system calls this method conditionally, depending on whether or not one of your app launch methods (application:willFinishLaunchingWithOptions: or application:didFinishLaunchingWithOptions:) has already handled a quick action invocation. The system calls a launch method (before calling this method) when a user selects a quick action for your app and your app launches instead of activating.

The requested quick action might employ code paths different than those used otherwise when your app launches. For example, say your app normally launches to display view A, but your app was launched in response to a quick action that needs view B. To handle such cases, check, on launch, whether your app is being launched via a quick action. Perform this check in your application:willFinishLaunchingWithOptions: or application:didFinishLaunchingWithOptions: method by checking for the UIApplicationLaunchOptionsShortcutItemKey launch option key. The UIApplicationShortcutItem object is available as the value of the launch option key.

If you find that your app was indeed launched using a quick action, perform the requested quick action within the launch method and return a value of NO from that method. When you return a value of NO, the system does not call the application:performActionForShortcutItem:completionHandler: method.