How do I register a custom filetype in iOS【链接】

http://stackoverflow.com/questions/6440902/ios-custom-icon-email-attachment

http://stackoverflow.com/questions/4186401/how-do-i-register-a-custom-filetype-in-ios

http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application

https://developer.apple.com/library/mac/#documentation/Miscellaneous/Reference/UTIRef/Articles/System-DeclaredUniformTypeIdentifiers.html

https://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/Introduction/Introduction.html