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How to find the path to a file in your bundle

Paul Hudson       @twostraws

It’s common to store resource data like text files and sound effects inside your bundle, but loading them must be done in a particular way to avoid problems.

Rather than try to figure out the layout of your bundle at runtime, the correct thing to do is call the path(forResource:) method if you’re looking for a string path, or url(forResource:) if you’re looking for a URL.

For example, these two lines find the path to input.txt inside the bundle, as both a string and a URL:

let stringPath = Bundle.main.path(forResource: "input", ofType: "txt")
let urlPath = Bundle.main.url(forResource: "input", withExtension: "txt")

Obviously you only need one of those – if you get to choose then it’s safer to go with the URL.

Available from iOS

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