I am using ionic framework. I\'m trying to set up a way to receive a url from another app. Like, you are in browser, click share, and send the link to another app (my app). I fo
what you are asking is deep linking facility for your app. Although I can't provide you exact solution but its fairly simple by writing few lines of code into your native ios app's .plist file (just like what you did for android in manifest.xml). Its called URL scheming, and you can make one for your ios app too.
Please go to http://docs.urbanairship.com/topic-guides/ios-deep-linking.html. I hope it provides you guidance over how you can do this.
The angular/ionic code which opens 'another app that has provided deep linking facility(like youtube,etc.)' - https://medium.com/angularjs-articles/deep-linking-in-ionic-mobile-applications-44d8b4685bb3