protocol _NSStringCoreType Inheritance _NSCopyingType, _NSFastEnumerationType, _ShadowProtocol View Protocol Hierarchy → Import import Swift Instance Methods func characterAtIndex(_:) Required Declaration func characterAtIndex(index: Int) -> UInt16 func copyWithZone(_:) Required Declaration func copyWithZone(zone: _SwiftNSZone) -> AnyObject Declared In _NSCopyingType func countByEnumeratingWithState(_:objects:count:) Required Declaration func countByEnumeratingWithState(state: UnsafeMutablePointer<_SwiftNSFastEnumerationState>, objects: UnsafeMutablePointer<AnyObject>, count: Int) -> Int Declared In _NSFastEnumerationType func length() Required Declaration func length() -> Int