如何創建在迅速 let path:String = NSBundle.mainBundle().pathForResource(name.stringByDeletingPathExtension, ofType:"pdf")
let string:CFString = ??? path
let url:CFURLRef = CFURLCreateWithFileSystemP
let string = "\u{00A0}" // no-break space
let transformed = string.stringByApplyingTransform(NSStringTransformToUnicodeName, reverse: false)
時預期的結果:NO-BREAK SPACE 實際結果:\N{NO_BREAK_SPACE} 爲什麼額外\N{和}