NSString

@interface NSString : NSObject <NSCoding, NSCopying, NSMutableCopying>

 // Convenience Constructors

   + (id)string;

   + (id)stringWithCString:(const char *)bytes;

   + (id)stringWithCString:(const char *)bytes length:(unsigned)length;

   + (id)stringWithCharacters:(const unichar *)characters  length:(unsigned)length;

   + (id)stringWithContentsOfFile:(NSString *)path;

   + (id)stringWithContentsOfURL:(NSURL *)url;

   + (id)stringWithFormat:(NSString *)format, ...;

   + (id)stringWithString:(NSString *)string;

   + (id)stringWithUTF8String:(const char *)bytes;

 // Initializers

   - (id)init;

   - (id)initWithCString:(const char *)bytes;

   - (id)initWithCString:(const char *)bytes length:(unsigned)length;

   - (id)initWithCStringNoCopy:(char *)bytes  length:(unsigned)length freeWhenDone:(BOOL)freeBuffer;

   - (id)initWithCharacters:(const unichar *)characters length:(unsigned)length;

   - (id)initWithCharactersNoCopy:(unichar *)characters length:(unsigned)length freeWhenDone:(BOOL)freeBuffer;

   - (id)initWithContentsOfFile:(NSString *)path;

   - (id)initWithContentsOfURL:(NSURL *)url;

   - (id)initWithData:(NSData *)data encoding:(NSStringEncoding)encoding;

   - (id)initWithFormat:(NSString *)format arguments:(va_list)argList;

   - (id)initWithFormat:(NSString *)format locale:(NSDictionary *)dict arguments:(va_list)argList;

   - (id)initWithFormat:(NSString *)format locale:(NSDictionary *)dict, ...;

   - (id)initWithFormat:(NSString *)format, ...;

   - (id)initWithString:(NSString *)aString;

   - (id)initWithUTF8String:(const char *)bytes;

 // Class Methods

   + (const NSStringEncoding *)availableStringEncodings;

   + (NSStringEncoding)defaultCStringEncoding;

   + (NSString *)localizedNameOfStringEncoding:(NSStringEncoding)encoding;

   + (id)localizedStringWithFormat:(NSString *)format, ...;

   + (NSString *)pathWithComponents:(NSArray *)components;

 // Instance Methods

   - (const char *)UTF8String;

   - (const char *)cString;

   - (unsigned)cStringLength;

   - (BOOL)canBeConvertedToEncoding:(NSStringEncoding)encoding;

   - (NSString *)capitalizedString;

   - (NSComparisonResult)caseInsensitiveCompare:(NSString *)string;

   - (unichar)characterAtIndex:(unsigned)index;

   - (NSString *)commonPrefixWithString:(NSString *)aString options:(unsigned)mask;

   - (NSComparisonResult)compare:(NSString *)string;

   - (NSComparisonResult)compare:(NSString *)string options:(unsigned)mask;

   - (NSComparisonResult)compare:(NSString *)string options:(unsigned)mask range:(NSRange)compareRange;

   - (NSComparisonResult)compare:(NSString *)string options:(unsigned)mask range:(NSRange)compareRange
        locale:(NSDictionary *)dict;

   - (unsigned)completePathIntoString:(NSString **)outputName caseSensitive:(BOOL)flag
        matchesIntoArray:(NSArray **)outputArray filterTypes:(NSArray *)filterTypes;

   - (NSArray *)componentsSeparatedByString:(NSString *)separator;

   - (NSData *)dataUsingEncoding:(NSStringEncoding)encoding;

   - (NSData *)dataUsingEncoding:(NSStringEncoding)encoding allowLossyConversion:(BOOL)lossy;

   - (NSString *)decomposedStringWithCanonicalMapping;

   - (NSString *)decomposedStringWithCompatibilityMapping;

   - (NSString *)description;

   - (double)doubleValue;

   - (NSStringEncoding)fastestEncoding;

   - (const char *)fileSystemRepresentation;

   - (float)floatValue;

   - (void)getCString:(char *)bytes;

   - (void)getCString:(char *)bytes maxLength:(unsigned)maxLength;

   - (void)getCString:(char *)bytes maxLength:(unsigned)maxLength range:(NSRange)aRange
        remainingRange:(NSRangePointer)leftoverRange;

   - (void)getCharacters:(unichar *)buffer;

   - (void)getCharacters:(unichar *)buffer  range:(NSRange)aRange;

   - (BOOL)getFileSystemRepresentation:(char *)cname maxLength:(unsigned)max;

   - (void)getLineStart:(unsigned *)startPtr end:(unsigned *)lineEndPtr contentsEnd:(unsigned *)contentsEndPtr
        forRange:(NSRange)range;

   - (BOOL)hasPrefix:(NSString *)aString;

   - (BOOL)hasSuffix:(NSString *)aString;

   - (unsigned)hash;

   - (int)intValue;

   - (BOOL)isAbsolutePath;

   - (BOOL)isEqualToString:(NSString *)aString;

   - (NSString *)lastPathComponent;

   - (unsigned int)length;

   - (NSRange)lineRangeForRange:(NSRange)range;

   - (NSComparisonResult)localizedCaseInsensitiveCompare:(NSString *)string;

   - (NSComparisonResult)localizedCompare:(NSString *)string;

   - (const char *)lossyCString;

   - (NSString *)lowercaseString;

   - (NSArray *)pathComponents;

   - (NSString *)pathExtension;

   - (NSString *)precomposedStringWithCanonicalMapping;

   - (NSString *)precomposedStringWithCompatibilityMapping;

   - (id)propertyList;

   - (NSDictionary *)propertyListFromStringsFileFormat;

   - (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet;

   - (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet options:(unsigned int)mask;

   - (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet
        options:(unsigned int)mask range:(NSRange)searchRange;

   - (NSRange)rangeOfComposedCharacterSequenceAtIndex:(unsigned)index;

   - (NSRange)rangeOfString:(NSString *)aString;

   - (NSRange)rangeOfString:(NSString *)aString options:(unsigned)mask;

   - (NSRange)rangeOfString:(NSString *)aString options:(unsigned)mask range:(NSRange)searchRange;

   - (NSStringEncoding)smallestEncoding;

   - (NSString *)stringByAbbreviatingWithTildeInPath;

   - (NSString *)stringByAppendingFormat:(NSString *)format, ...;

   - (NSString *)stringByAppendingPathComponent:(NSString *)str;

   - (NSString *)stringByAppendingPathExtension:(NSString *)str;

   - (NSString *)stringByAppendingString:(NSString *)aString;

   - (NSString *)stringByDeletingLastPathComponent;

   - (NSString *)stringByDeletingPathExtension;

   - (NSString *)stringByExpandingTildeInPath;

   - (NSString *)stringByPaddingToLength:(unsigned)newLength withString:(NSString *)padString
        startingAtIndex:(unsigned)padIndex;

   - (NSString *)stringByResolvingSymlinksInPath;

   - (NSString *)stringByStandardizingPath;

   - (NSString *)stringByTrimmingCharactersInSet:(NSCharacterSet *)set;

   - (NSArray *)stringsByAppendingPaths:(NSArray *)paths;

   - (NSString *)substringFromIndex:(unsigned)from;

   - (NSString *)substringToIndex:(unsigned)to;

   - (NSString *)substringWithRange:(NSRange)range;

   - (NSString *)uppercaseString;

   - (BOOL)writeToFile:(NSString *)path atomically:(BOOL)useAuxiliaryFile;

   - (BOOL)writeToURL:(NSURL *)url atomically:(BOOL)atomically;

 // Methods Implementing NSCoding

   - (void)encodeWithCoder:(NSCoder *)aCoder;

   - (id)initWithCoder:(NSCoder *)aDecoder;

 // Methods Implementing NSCopying

   - (id)copyWithZone:(NSZone *)zone;

 // Methods Implementing NSMutableCopying

   - (id)mutableCopyWithZone:(NSZone *)zone;