Cannot load custom fonts in Postscript Type 1 format

I have no problem to load custom fonts in formats of .otf or .ttf.

But my client sent me a DIN font suite in Postscript Type 1, which has no file name suffix. What I did: 1. added font file to Xcode 4. Xcode 4 can generate font preview 2. revised .plist file, by inserting rows to "Fonts provided by application" 3. use [UIFont fontWithName: size:] method to load custom font

what I received: upon app starts, a log messag开发者_开发问答e was generated in console saying ": FT_Open_Face failed: error 85."

Please guide me, thank you!

I think it's only possible to use .ttf and .otf custom fonts for this case.