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I am trying to come up with regex to validate iOS app's bundle id. This link was quite helpful. However I also need to validate length of supplied bundleid as well as length of strings between dots (here I am assuming there would be such restrictions from Apple) . For example, in bundle id 'com.company.project' I need to ensure 'company', 'project' etc are also within in allowed limit. I tried finding any apple docs that talks about maximum allowed bundle id but I couldn't. Is it like any length is allowed? Any help appreciated.
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The Apple bundle ID is a unique identifier associated with iOS apps. App owners set this ID. Apple recommends that app owners name the ID using a reverse domain-name notation. Example: com.domain.appname.
Bundle IDs are case sensitive.
A bundle ID uniquely identifies a single app throughout the system. The bundle ID string must contain only alphanumeric characters (A–Z, a–z, and 0–9), hyphens (-), and periods (.). Typically, you use a reverse-DNS format for bundle ID strings. Bundle IDs are case-insensitive.
Open you project with XCode, select the top project item in the project navigator at the left. Then select TARGETS -> General. Bundle Identifier is found under Identity.
Apparently 155 characters.
Checked in Apple Developer Account as seen below:
Also, it could be one long character set without .'s
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From inspecting the HTML of the create App ID page on May 14, 2018, here are the constraints including a regular expression to validate the bundle identifier:
Name
^[0-9A-Za-z\d\s]+$
Bundle Identifier
^[A-Za-z0-9\.\-]+$
The original question was a regular expression to validate bundle identifiers, you could use this to do that:
^[A-Za-z0-9\.\-]{1,155}$
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