Get the main app bundle from within extension

Question

Is it possible to get the containing app's NSBundle from within an app extension? I would like to get the main app's display name, not the extension's display name.

Answer 1

The +mainBundle method returns the bundle containing the "current application executable", which is a subfolder of your app when called from within an extension.

This solution involves peeling off two directory levels from the URL of the bundle, when it ends in "appex".

Objective-C

NSBundle *bundle = [NSBundle mainBundle]; if ([[bundle.bundleURL pathExtension] isEqualToString:@"appex"]) {     // Peel off two directory levels - MY_APP.app/PlugIns/MY_APP_EXTENSION.appex     bundle = [NSBundle bundleWithURL:[[bundle.bundleURL URLByDeletingLastPathComponent] URLByDeletingLastPathComponent]]; }  NSString *appDisplayName = [bundle objectForInfoDictionaryKey:@"CFBundleDisplayName"]; 

Swift 2.2

var bundle = NSBundle.mainBundle() if bundle.bundleURL.pathExtension == "appex" {     // Peel off two directory levels - MY_APP.app/PlugIns/MY_APP_EXTENSION.appex     bundle = NSBundle(URL: bundle.bundleURL.URLByDeletingLastPathComponent!.URLByDeletingLastPathComponent!)! }  let appDisplayName = bundle.objectForInfoDictionaryKey("CFBundleDisplayName") 

Swift 3

var bundle = Bundle.main if bundle.bundleURL.pathExtension == "appex" {     // Peel off two directory levels - MY_APP.app/PlugIns/MY_APP_EXTENSION.appex     let url = bundle.bundleURL.deletingLastPathComponent().deletingLastPathComponent()     if let otherBundle = Bundle(url: url) {         bundle = otherBundle     } }  let appDisplayName = bundle.object(forInfoDictionaryKey: "CFBundleDisplayName") 

This will break if the pathExtension or the directory structure for an iOS extension ever changes.