How to create a custom UTType and make it enable for UIDocumentPickerViewController?

Question

I am creating an app in which there are custom file types such as .xyz file, which is not part of UTType API.

Here are the case problems:

• I want to create a custom UTType with xyz extension.
• While opening file app, only those file should be enable which has extension .xyz
• The file with xyz extension should show a custom icon on file App.

Answer 1

You should have mentioned the solutions you tried and it did not work for you.

By the way, there are few steps that you can follow:

Step 1. Create your document type in info.plist

• Give the name of your file type such as xyz
• Define the type identifier such as com.app.xyz
• Define the file icon against the key CFBundleTypeIconFiles

Step 2: Define the exported type identifier in info.plist

• Add the same identifier that we added while defining document type, i.e. com.app.xyz

• define your extension xyz, XYZ

Step 3: Now while initialising UIDocumentPickerViewController, use the UTtype with identifier you declared in first two steps:

let xyzUTType = UTType("com.app.xyz")
let documentPicker = UIDocumentPickerViewController(forOpeningContentTypes: [xyzUTType], asCopy: true)