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

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.

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)