Tutorial by Examples

Set my app as default app for a file type

- (NSString *) UTIforFileExtension:(NSString *) extension { NSString * UTIString = (NSString *)UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (CFStringRef)extension, ...

Create association with new/custom file types via Info.plist

<key>CFBundleDocumentTypes</key> <array> <dict> <key>CFBundleTypeIconFile</key> <string>Icon file for associated file</string> <key>CFBundleTypeName</key> <string>My file format</string>...

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