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In iOS you can set up URL scheme so other apps can launch you or pass data to you. What's the URL Identifier for? It doesn't seem to be used anywhere other than when you specify URL Schemes.
Also, what happen when there is duplicate URL schemes on the phone?
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URL schema is used as an identifier in launching applications and performing a set of commands in iOS devices. The schema name of a URL is the first part of a URL. (e.g. schemaname:// ). For web pages, the schemas are usually http or https.
In Android 1.0, the Android URI scheme deep linking mechanism was created. It allows the developer to register their app for a URI (uniform resource identifier) in the operating system for a specific device once the app is installed.
First, you have to download the IPA file for the app, which requires macOS and Apple Configurator 2. When you finally find the IPA, you have to turn it into a ZIP file, show the contents of the app package, then hunt for the specific PLIST file that contains the scheme names.
According to Apple documentation they don't give much info about the identifier and why it is needed or where it is used. They only say that it should be unique:
A string containing the abstract name of the URL scheme. To ensure uniqueness, it is recommended that you specify a reverse-DNS style of identifier, for example, com.acme.myscheme. The string you specify is also used as a key in your app’s InfoPlist.strings file. The value of the key is the human-readable scheme name.
Also if more than one app specify the same url scheme, then the outcome is unpredictable:
Note: If more than one third-party app registers to handle the same URL scheme, there is currently no process for determining which app will be given that scheme.
The experience taught me that the app who first registered that scheme will be opened, but this may be wrong.
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