# NSString Implementations ## Topics ### Initializers [`convenience init?(CString: UnsafePointer)`](/documentation/Foundation/NSString/init(CString:)-vkuo) Initializes the receiver, a newly allocated `NSString` object, by converting the data in a given C-string from the default C-string encoding into the Unicode character encoding. [`convenience init?(CString: UnsafePointer, encoding: UInt)`](/documentation/Foundation/NSString/init(CString:encoding:)-7xice) [`convenience init?(CString: UnsafePointer, encoding: UInt)`](/documentation/Foundation/NSString/init(CString:encoding:)-8229r) [`convenience init?(CString: UnsafePointer, length: Int)`](/documentation/Foundation/NSString/init(CString:length:)-5ure3) Initializes the receiver, a newly allocated `NSString` object, by converting the data in a given C-string from the default C-string encoding into the Unicode character encoding. [`convenience init?(CStringNoCopy: UnsafeMutablePointer, length: Int, freeWhenDone: Bool)`](/documentation/Foundation/NSString/init(CStringNoCopy:length:freeWhenDone:)-86dm2) Initializes the receiver, a newly allocated `NSString` object, by converting the data in a given C-string from the default C-string encoding into the Unicode character encoding. [`convenience init?(UTF8String: UnsafePointer)`](/documentation/Foundation/NSString/init(UTF8String:)-321f6) [`convenience init?(UTF8String: UnsafePointer)`](/documentation/Foundation/NSString/init(UTF8String:)-vwmq) [`convenience init?(contentsOfURL: URL)`](/documentation/Foundation/NSString/init(contentsOfURL:)) Initializes the receiver, a newly allocated `NSString` object, by reading data from the location named by a given URL. [`convenience init(contentsOfURL: URL, encoding: UInt) throws`](/documentation/Foundation/NSString/init(contentsOfURL:encoding:)-1d0eu) [`convenience init(contentsOfURL: URL, encoding: UInt) throws`](/documentation/Foundation/NSString/init(contentsOfURL:encoding:)-6iivc) [`convenience init(contentsOfURL: URL, usedEncoding: UnsafeMutablePointer?) throws`](/documentation/Foundation/NSString/init(contentsOfURL:usedEncoding:)-5ekap) [`convenience init(contentsOfURL: URL, usedEncoding: UnsafeMutablePointer?) throws`](/documentation/Foundation/NSString/init(contentsOfURL:usedEncoding:)-86ukw) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)