iOS8最新API和一些生僻API，做了紅色標注，便於大家查閱。

//0.定義一個無符號整型 
兩個字節 范圍[0,65535]

typedef unsigned 
short unichar;

//1.提前進入以下六個類告訴編譯器，六個都是類的名稱

@classNSData,NSArray,NSDictionary,NSCharacterSet,NSURL,NSError,NSLocale;

//2.異常處理字符串，控制台出錯信息報告

FOUNDATION_EXPORTNSString *const NSParseErrorException; 

//3.宏定義下字符串的最大值

#define NSMaximumStringLength (INT_MAX-1)

//4.字符串進行比較options

typedefNS_OPTIONS(NSUInteger, NSStringCompareOptions) {

    NSCaseInsensitiveSearch =1,//兩個字符串的比較不區分大小寫

NSLiteralSearch = 2,//兩個字符串的比較區分大小寫

    NSBackwardsSearch =4,//從字符串末尾開發查詢搜索

    NSAnchoredSearch =8,//搜索有限制范圍的字符串

NSNumericSearch = 64,//根據字符串裡的數字來計算順序

    NSDiacriticInsensitiveSearchNS_ENUM_AVAILABLE(10_5,2_0) =128, 

NSWidthInsensitiveSearch NS_ENUM_AVAILABLE(10_5,2_0) =256,//可以忽略字符串的寬度（長度）比較結果 

    NSForcedOrderingSearchNS_ENUM_AVAILABLE(10_5,2_0) =512,//忽略不區分大小寫比較的選項

    NSRegularExpressionSearchNS_ENUM_AVAILABLE(10_7,3_2) =1024
//  

};



//5.字符串編碼的多種選項

enum {

    NSASCIIStringEncoding =1,/* 0..127 only */

    NSNEXTSTEPStringEncoding =2,

    NSJapaneseEUCStringEncoding =3,

    NSUTF8StringEncoding =4,

    NSISOLatin1StringEncoding =5,

    NSSymbolStringEncoding =6,

    NSNonLossyASCIIStringEncoding =7,

    NSShiftJISStringEncoding =8,         /* kCFStringEncodingDOSJapanese */

    NSISOLatin2StringEncoding =9,

    NSUnicodeStringEncoding =10,

    NSWindowsCP1251StringEncoding = 11,   /* Cyrillic; same as AdobeStandardCyrillic */

    NSWindowsCP1252StringEncoding =12,   /* WinLatin1 */

    NSWindowsCP1253StringEncoding =13,   /* Greek */

    NSWindowsCP1254StringEncoding =14,   /* Turkish */

    NSWindowsCP1250StringEncoding =15,   /* WinLatin2 */

    NSISO2022JPStringEncoding = 21,       /* ISO 2022 Japanese encoding for e-mail */

    NSMacOSRomanStringEncoding =30,



    NSUTF16StringEncoding = NSUnicodeStringEncoding,     /* An alias for NSUnicodeStringEncoding */



    NSUTF16BigEndianStringEncoding = 0x90000100,         /* NSUTF16StringEncoding encoding with explicit endianness specified */

    NSUTF16LittleEndianStringEncoding = 0x94000100,      /* NSUTF16StringEncoding encoding with explicit endianness specified */



    NSUTF32StringEncoding =0x8c000100,                   

    NSUTF32BigEndianStringEncoding = 0x98000100,         /* NSUTF32StringEncoding encoding with explicit endianness specified */

    NSUTF32LittleEndianStringEncoding = 0x9c000100       /* NSUTF32StringEncoding encoding with explicit endianness specified */

};

//6.字符串編碼

typedefNSUInteger NSStringEncoding;

    字符串編碼轉換條件option，下面指定緩沖區轉換會用到

typedefNS_OPTIONS(NSUInteger, NSStringEncodingConversionOptions) {

    NSStringEncodingConversionAllowLossy =1,

    NSStringEncodingConversionExternalRepresentation =2

};

//7.字符轉化異常

FOUNDATION_EXPORTNSString *const NSCharacterConversionException;



//8. NSString繼承NSObject，並遵守以下三個協議

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

//9.只讀屬性字符串長度length

@property (readonly)NSUInteger length;

//10.選取字符串對應下表的字符

-(unichar)characterAtIndex:(NSUInteger)index;
//11.字符串的init初始化方法

-(instancetype)initNS_DESIGNATED_INITIALIZER;
//12.當一個xib的控件被加載實例化的時候，系統會默認調用這個方法。

- (instancetype)initWithCoder:(NSCoder *)aDecoderNS_DESIGNATED_INITIALIZER;



@end

//13.NSString的擴展方法

@interface NSString (NSStringExtensionMethods)

//14.截取字符串的指定段

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

//15.截取指定位置Index之後字符串

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

//16.從索引0第一個字符串開始，截取指定長度的字符串

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

//17.截取字符串的指定段，返回值為NSString

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

//18.比較兩個字符串 

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

//19.比較兩個字符串，並加上條件

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

//20.比較兩個字符串，並加上某些條件到指定段

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

//21.比較兩個字符串，並加上某些條件還有本地化語言環境，在指定段進行比較

- (NSComparisonResult)compare:(NSString *)string options:(NSStringCompareOptions)mask
range:(NSRange)compareRange locale:(id)locale; 

//22.不區分大小寫比較字符串

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

//23.本地化比較字符串

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

//24.不區分大小寫以及本地化比較字符串

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

//25.本地化標准字符串比較，返回升序降序相等

- (NSComparisonResult)localizedStandardCompare:(NSString *)stringNS_AVAILABLE(10_6,4_0);

//26.比較兩個字符串是否相等

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

//27.測試字符串是否以aString開頭

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

//28.測試字符串是否以aString結尾

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

//29.判斷字符串A是否包含aString字符串B，返回值Bool

- (BOOL)containsString:(NSString *)aStringNS_AVAILABLE(10_10,8_0);



//30.這是iOS8的新特性API 判斷字符串A是否包含字符串B，不區分大小寫，返回Bool 

例：NSSsring * stringA = @“abcd”;

        NSSsring * stringB = @“d”;

        BOOl  test = [stringA localizedCaseInsensitiveContainsString:stringB];

       輸出打印值 YES

- (BOOL)localizedCaseInsensitiveContainsString:(NSString *)aString NS_AVAILABLE(10_10, 8_0);



//31.搜索一個字符串是否包含某個字符 rangeOfString前面的參數是要被搜索的字符串，後面的是要搜索的字符

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

//32.搜索一個字符串是否包含某個字符，並添加篩選條件option

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

//33搜索一個字符串是否包含某個字符，添加篩選條件以及搜索的范圍range

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

//34.搜索一個字符串是否包含某個字符，添加篩選條件以及搜索的范圍range,最後還有本地化的設置

- (NSRange)rangeOfString:(NSString *)aString options:(NSStringCompareOptions)mask
range:(NSRange)searchRange locale:(NSLocale *)localeNS_AVAILABLE(10_5,2_0);

//35.指定字符集進行搜索

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

//36.指定字符集進行搜索，並且加上某些限制條件

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

//37.指定字符集進行搜索，並且加上某些限制條件，且在指定的位置段進行

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

//38.用字符串的字符編碼指定索引查找位置

- (NSRange)rangeOfComposedCharacterSequenceAtIndex:(NSUInteger)index;

//39.用字符串的字符編碼指定區域段查找位置

- (NSRange)rangeOfComposedCharacterSequencesForRange:(NSRange)rangeNS_AVAILABLE(10_5,2_0);

//40.將aString字符串添加到前面字符串A的後面

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

//41.將多個字符串添加到前面字符串A的後面

- (NSString *)stringByAppendingFormat:(NSString *)format, ...NS_FORMAT_FUNCTION(1,2);

//42.只讀屬性 double類型

@property (readonly)double doubleValue;

//43.只讀屬性 float類型

@property (readonly)float floatValue;

//44.只讀屬性int類型

@property (readonly)int intValue;

//45.只讀屬性NSInteger類型

@property (readonly)NSInteger integerValueNS_AVAILABLE(10_5,2_0);

// 46.只讀屬性long long 類型

@property (readonly)longlong longLongValueNS_AVAILABLE(10_5,2_0);

//47.只讀屬性BOOL類型

@property (readonly)BOOL boolValueNS_AVAILABLE(10_5,2_0); // 

//48.將字符串根據傳進來的字符串參數separator進行分割，並轉化成數組

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

// 49. 將字符串根據傳進來的字符編碼separator進行分割，並拆分成數組返回

- (NSArray *)componentsSeparatedByCharactersInSet:(NSCharacterSet *)separatorNS_AVAILABLE(10_5,2_0);

//50.

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

//51. 將字符串的所有字符轉化成大寫

@property (readonly,copy)NSString *uppercaseString;

//52.將字符串的所有字符轉化為小寫

@property (readonly,copy)NSString *lowercaseString;

// 53. 所有單詞的首字母轉化成大寫

@property (readonly,copy)NSString *capitalizedString;

//54.所有字符轉化成大寫 本地化

- (NSString *)uppercaseStringWithLocale:(NSLocale *)localeNS_AVAILABLE(10_8,6_0);

//55.所有字符串轉化成小寫 本地化

- (NSString *)lowercaseStringWithLocale:(NSLocale *)localeNS_AVAILABLE(10_8,6_0);

//54.所有單詞首字母轉化成大寫 本地化

- (NSString *)capitalizedStringWithLocale:(NSLocale *)localeNS_AVAILABLE(10_8,6_0);

//55.刪除字符串中包含字符集部分的字符 返回字符串 

            擴展一下，如果想要刪除字符串前後的空格或者回車，這樣做：

           [stringA stringByTrimmingCharactersInSet:   [NSCharacterSetWhitespaceAndNewLineCharacterSet]];

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

//56.將字符串padString指定索引段添加到前面字符串後面

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

//57.指定段分行去字符串

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

//58.返回字符串指定段位置和長度

- (NSRange)lineRangeForRange:(NSRange)range;

//59.給字符串指定段分段取字符串

- (void)getParagraphStart:(NSUInteger *)startPtr end:(NSUInteger *)parEndPtr
contentsEnd:(NSUInteger *)contentsEndPtr forRange:(NSRange)range;

//60指定段分段的位置和長度

- (NSRange)paragraphRangeForRange:(NSRange)range;

//61.

typedefNS_OPTIONS(NSUInteger, NSStringEnumerationOptions) {

    // Pass in one of the "By" options:

    NSStringEnumerationByLines =0,                      // Equivalent to lineRangeForRange:

    NSStringEnumerationByParagraphs =1,                 // Equivalent to paragraphRangeForRange:

    NSStringEnumerationByComposedCharacterSequences =2, // Equivalent to rangeOfComposedCharacterSequencesForRange:

    NSStringEnumerationByWords =3,

    NSStringEnumerationBySentences =4,

    // ...and combine any of the desired additional options:

    NSStringEnumerationReverse =1UL <<8,

    NSStringEnumerationSubstringNotRequired =1UL <<9,

    NSStringEnumerationLocalized =1UL <<10             // User's default locale

};

//62.檢查是否在指定范圍內是否有匹配的字符串

- (void)enumerateSubstringsInRange:(NSRange)range options:(NSStringEnumerationOptions)opts
usingBlock:(void (^)(NSString *substring,NSRange substringRange,NSRange enclosingRange,
BOOL *stop))blockNS_AVAILABLE(10_6,4_0);

//63.列舉枚舉字符串所有行

- (void)enumerateLinesUsingBlock:(void (^)(NSString *line,BOOL
*stop))block NS_AVAILABLE(10_6,4_0);

//64.字符串

@property (readonly,copy)NSString *description;

//65.返回字符串哈希地址

@property (readonly)NSUInteger hash;

/*** Encoding methods ***/

//66.字符串最快編碼值

@property (readonly)NSStringEncoding fastestEncoding;   // 

//67.字符串最小編碼值

@property (readonly)NSStringEncoding smallestEncoding;  // 

//68.返回指定編碼的NSData對象

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

//69.返回指定編碼的NSData對象

- (NSData *)dataUsingEncoding:(NSStringEncoding)encoding;                                   //
External representation

//70.判斷是否可以無損化轉碼

- (BOOL)canBeConvertedToEncoding:(NSStringEncoding)encoding;

//71.char編碼轉化

- (__strongconstchar *)cStringUsingEncoding:(NSStringEncoding)encodingNS_RETURNS_INNER_POINTER;

//72.C字符串轉化是夠成功

- (BOOL)getCString:(char *)buffer maxLength:(NSUInteger)maxBufferCount encoding:(NSStringEncoding)encoding;//
NO return if conversion not 

//73.指定緩存區轉換

- (BOOL)getBytes:(void *)buffer maxLength:(NSUInteger)maxBufferCount usedLength:(NSUInteger
*)usedBufferCount encoding:(NSStringEncoding)encoding options:(NSStringEncodingConversionOptions)options range:(NSRange)range remainingRange:(NSRangePointer)leftover;

//74.字符串編碼時需要用的字節長度

- (NSUInteger)maximumLengthOfBytesUsingEncoding:(NSStringEncoding)enc;



//75.字符串編碼時需要用到最大字節長度

- (NSUInteger)lengthOfBytesUsingEncoding:(NSStringEncoding)enc;

//76.unicode范式D標准化

@property (readonly,copy)NSString *decomposedStringWithCanonicalMapping;

//77.unicode范式c標准化

@property (readonly,copy)NSString *precomposedStringWithCanonicalMapping;

//78.unicode范式KD標准化

@property (readonly,copy)NSString *decomposedStringWithCompatibilityMapping;

//79.unicode范式KC標准化

@property (readonly,copy)NSString *precomposedStringWithCompatibilityMapping;

//80.本地化字符串折疊

- (NSString *)stringByFoldingWithOptions:(NSStringCompareOptions)options locale:(NSLocale
*)locale NS_AVAILABLE(10_5,2_0);

//81.字符串的指定區域段被有條件的替換掉

- (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString
*)replacement options:(NSStringCompareOptions)options range:(NSRange)searchRangeNS_AVAILABLE(10_5,2_0);

//82.字符串的特定字符串被替換掉

- (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString
*)replacement NS_AVAILABLE(10_5,2_0);

//83.將字符串的指定區域段字符串被替換掉

- (NSString *)stringByReplacingCharactersInRange:(NSRange)range withString:(NSString
*)replacement NS_AVAILABLE(10_5,2_0);

//84.將字符串轉化為char類型

@property (readonly)__strongconstchar *UTF8StringNS_RETURNS_INNER_POINTER;

//85.默認C字符串編碼

+ (NSStringEncoding)defaultCStringEncoding;

//86.可用的字符串編碼

+ (constNSStringEncoding *)availableStringEncodings;

//87.編碼的名稱vheng

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

//88.指定緩沖區，編碼和字節長度初始化NSString對象

- (instancetype)initWithCharactersNoCopy:(unichar *)characters length:(NSUInteger)length
freeWhenDone:(BOOL)freeBuffer;

//89.指定unichar字符，字節長度初始化NSString對象

- (instancetype)initWithCharacters:(constunichar *)characters length:(NSUInteger)length;

//90.轉化為NSString對象

- (instancetype)initWithUTF8String:(constchar *)nullTerminatedCString;

//91.指定字符串初始化為NSString對象

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

//92.格式化多個字符串初始化NSString對象

- (instancetype)initWithFormat:(NSString *)format, ...NS_FORMAT_FUNCTION(1,2);

//93. 格式化字符串初始化NSString對象

- (instancetype)initWithFormat:(NSString *)format arguments:(va_list)argListNS_FORMAT_FUNCTION(1,0);

//94.本地化格式化多個字符串初始化NSString對象

- (instancetype)initWithFormat:(NSString *)format locale:(id)locale, ...NS_FORMAT_FUNCTION(1,3);

//95.本地化格式化字符串初始化NSString對象

- (instancetype)initWithFormat:(NSString *)format locale:(id)locale arguments:(va_list)argListNS_FORMAT_FUNCTION(1,0);

//96.指定編碼轉化NSData數據

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

//97.指定編碼和字節數初始化NSString對象

- (instancetype)initWithBytes:(constvoid *)bytes length:(NSUInteger)len
encoding:(NSStringEncoding)encoding;

//98.指定緩沖區，編碼和字節數初始化NSString對象

- (instancetype)initWithBytesNoCopy:(void *)bytes length:(NSUInteger)len
encoding:(NSStringEncoding)encoding freeWhenDone:(BOOL)freeBuffer;

//99.初始化空字符串

+ (instancetype)string;

//100.初始化NSString字符串

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

//101.返回指定長度unichar的C字符串

+ (instancetype)stringWithCharacters:(constunichar *)characters length:(NSUInteger)length;

//102.轉化C字符串為UTF8串

+ (instancetype)stringWithUTF8String:(constchar *)nullTerminatedCString;

//103.初始化NSString對象昂，這種創建方式會自動釋放內存，很常用的一種方式

+ (instancetype)stringWithFormat:(NSString *)format, ...NS_FORMAT_FUNCTION(1,2);

//104.初始化NSString自動釋放內存，本地化

+ (instancetype)localizedStringWithFormat:(NSString *)format, ...NS_FORMAT_FUNCTION(1,2);

//105.初始化C字符串並且指定編碼，在這裡需要手動釋放內存（init）

- (instancetype)initWithCString:(constchar *)nullTerminatedCString encoding:(NSStringEncoding)encoding;

//106.初始化C字符串並且指定編碼，在這裡需要自動釋放內存

+ (instancetype)stringWithCString:(constchar *)cString encoding:(NSStringEncoding)enc;

//107.讀取URL地址數據轉化為字符串並且指定編碼，在這裡init創建需要手動釋放內存，已經知道編碼

- (instancetype)initWithContentsOfURL:(NSURL *)url encoding:(NSStringEncoding)enc
error:(NSError **)error;

//108.讀取FILE地址數據轉化為字符串並且指定編碼，同樣需要手動釋放內存，已經知道編碼

- (instancetype)initWithContentsOfFile:(NSString *)path encoding:(NSStringEncoding)enc
error:(NSError **)error;

//109.讀取URL地址數據轉化為字符串並且指定編碼，，這裡會自動釋放內存，已經知道編碼

+ (instancetype)stringWithContentsOfURL:(NSURL *)url encoding:(NSStringEncoding)enc
error:(NSError **)error;

//110.讀取FILE地址數據轉化為字符串並且指定編碼，這裡也會自定釋放內存，已經知道編碼

+ (instancetype)stringWithContentsOfFile:(NSString *)path encoding:(NSStringEncoding)enc
error:(NSError **)error;

//111.讀取URL地址數據轉化為字符串並且指定編碼，在這裡init創建需要手動釋放內存，不知道編碼

- (instancetype)initWithContentsOfURL:(NSURL *)url usedEncoding:(NSStringEncoding
*)enc error:(NSError **)error;

//112. 讀取FILE地址數據轉化為字符串並且指定編碼，同樣需要手動釋放內存，不知道編碼

- (instancetype)initWithContentsOfFile:(NSString *)path usedEncoding:(NSStringEncoding
*)enc error:(NSError **)error;

//113.取URL地址數據轉化為字符串並且指定編碼，，這裡會自動釋放內存，不知道編碼

+ (instancetype)stringWithContentsOfURL:(NSURL *)url usedEncoding:(NSStringEncoding
*)enc error:(NSError **)error;

//114.讀取FILE地址數據轉化為字符串並且指定編碼，這裡也會自定釋放內存，不知道編碼

+ (instancetype)stringWithContentsOfFile:(NSString *)path usedEncoding:(NSStringEncoding
*)enc error:(NSError **)error;

//115.將數據寫入URL並且指定編碼

- (BOOL)writeToURL:(NSURL *)url atomically:(BOOL)useAuxiliaryFile encoding:(NSStringEncoding)enc
error:(NSError **)error;

//116.將數據寫入文件並且指定編碼

- (BOOL)writeToFile:(NSString *)path atomically:(BOOL)useAuxiliaryFile encoding:(NSStringEncoding)enc
error:(NSError **)error;

@end



@interface NSMutableString :NSString

//117.使用aString替換前面字符串的指定區域字符

- (void)replaceCharactersInRange:(NSRange)range withString:(NSString *)aString;

@end

//118.可變字符串的擴展方法

@interface NSMutableString (NSMutableStringExtensionMethods)

//119.插入字符串aString，在指定的loc位置

- (void)insertString:(NSString *)aString atIndex:(NSUInteger)loc;

//120.刪除指定區域段的字符串

- (void)deleteCharactersInRange:(NSRange)range;

//121.追加字符串aString

- (void)appendString:(NSString *)aString;

//122.追加多個字符串

- (void)appendFormat:(NSString *)format, ...NS_FORMAT_FUNCTION(1,2);

//123.設置新的aString

- (void)setString:(NSString *)aString;

//124.初始化一個容量為capacity大小的字符串，並且需要手動釋放內存

- (NSMutableString *)initWithCapacity:(NSUInteger)capacity;

//125.初始化一個容量為capacity大小的字符串，但是不用手動釋放內存，這些提前指定的容量，知識用於內存優化，實際大小可以大於設置的容量capacity

+ (NSMutableString *)stringWithCapacity:(NSUInteger)capacity;

//126.指定限制條件，指定區段中的replacement替換成target

- (NSUInteger)replaceOccurrencesOfString:(NSString *)target withString:(NSString
*)replacement options:

(NSStringCompareOptions)options range:(NSRange)searchRange;



@end

//128.關於字符串編碼檢測的擴展

@interface NSString (NSStringEncodingDetection)

//129.對一份data數據進行轉換為字符串，有可選option字典，另外還有是否允許有損失，最終轉換之後返回一個編碼種類。下面是7種不同option字典選項

+ (NSStringEncoding)stringEncodingForData:(NSData *)data

                          encodingOptions:(NSDictionary *)opts

                          convertedString:(NSString **)string

                      usedLossyConversion:(BOOL *)usedLossyConversion NS_AVAILABLE(10_10, 8_0);

@end



FOUNDATION_EXPORTNSString *const NSStringEncodingDetectionSuggestedEncodingsKeyNS_AVAILABLE(10_10,8_0);



// NSArray of NSNumbers which contain NSStringEncoding values; if this key is not present in the dictionary, all encodings are considered

FOUNDATION_EXPORTNSString *const NSStringEncodingDetectionDisallowedEncodingsKeyNS_AVAILABLE(10_10,8_0);



// NSNumber boolean value; if this key is not present in the dictionary, the default value is NO

FOUNDATION_EXPORTNSString *const NSStringEncodingDetectionUseOnlySuggestedEncodingsKeyNS_AVAILABLE(10_10,8_0);



// NSNumber boolean value; if this key is not present in the dictionary, the default value is YES

FOUNDATION_EXPORTNSString *const NSStringEncodingDetectionAllowLossyKeyNS_AVAILABLE(10_10,8_0);



// NSNumber boolean value; if this key is not present in the dictionary, the default value is NO

FOUNDATION_EXPORTNSString *const NSStringEncodingDetectionFromWindowsKeyNS_AVAILABLE(10_10,8_0);





FOUNDATION_EXPORTNSString *const NSStringEncodingDetectionLossySubstitutionKeyNS_AVAILABLE(10_10,8_0);





FOUNDATION_EXPORTNSString *const NSStringEncodingDetectionLikelyLanguageKeyNS_AVAILABLE(10_10,8_0);



@interface NSString (NSExtendedStringPropertyListParsing)

//130.將字符串轉化為屬性列表

例如：NSString * stringA = [NSString stringWithFormat:@“Name =xulin ;

age = 23;”];

NSLog(@“%@”,[stringA  propertyList]);

控制台輸出為{

Name = xulin ;

age = 23;

}

- (id)propertyList;

//131.字符串轉化為字典

NSDictionary * dictionary  = [stringA propertyListFromStringFileFormat];

NSLog(@“%@”,dictionary);

控制台輸出為{

Name = xulin ;

age = 23;

}

- (NSDictionary *)propertyListFromStringsFileFormat



@end





//132.下面是一些棄用代碼。也就是上面所翻譯過的代碼。

@interface NSString (NSStringDeprecated)

- (constchar *)cStringNS_RETURNS_INNER_POINTERNS_DEPRECATED(10_0,10_4,2_0,
2_0);

- (constchar *)lossyCStringNS_RETURNS_INNER_POINTER
NS_DEPRECATED(10_0,10_4,2_0,
2_0);

- (NSUInteger)cStringLengthNS_DEPRECATED(10_0,10_4,2_0,
2_0);

- (void)getCString:(char *)bytesNS_DEPRECATED(10_0,10_4,2_0,
2_0);

- (void)getCString:(char *)bytes maxLength:(NSUInteger)maxLengthNS_DEPRECATED(10_0,10_4,2_0,
2_0);

- (void)getCString:(char *)bytes maxLength:(NSUInteger)maxLength range:(NSRange)aRange
remainingRange:(NSRangePointer)leftoverRange 
NS_DEPRECATED(10_0, 
10_4, 2_0, 
2_0);



- (BOOL)writeToFile:(NSString *)path atomically:(BOOL)useAuxiliaryFileNS_DEPRECATED(10_0,10_4,2_0,
2_0);

- (BOOL)writeToURL:(NSURL *)url atomically:(BOOL)atomicallyNS_DEPRECATED(10_0,10_4,2_0,
2_0);



- (id)initWithContentsOfFile:(NSString *)pathNS_DEPRECATED(10_0,10_4,2_0,
2_0);

- (id)initWithContentsOfURL:(NSURL *)urlNS_DEPRECATED(10_0,10_4,2_0,
2_0);

+ (id)stringWithContentsOfFile:(NSString *)pathNS_DEPRECATED(10_0,10_4,2_0,
2_0);

+ (id)stringWithContentsOfURL:(NSURL *)urlNS_DEPRECATED(10_0,10_4,2_0,
2_0);



- (id)initWithCStringNoCopy:(char *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)freeBufferNS_DEPRECATED(10_0,10_4,2_0,
2_0);

- (id)initWithCString:(constchar *)bytes length:(NSUInteger)lengthNS_DEPRECATED(10_0,10_4,2_0,
2_0);

- (id)initWithCString:(constchar *)bytesNS_DEPRECATED(10_0,10_4,2_0,
2_0);

+ (id)stringWithCString:(constchar *)bytes length:(NSUInteger)lengthNS_DEPRECATED(10_0,10_4,2_0,
2_0);

+ (id)stringWithCString:(constchar *)bytesNS_DEPRECATED(10_0,10_4,2_0,
2_0);

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

@end



enum {

    NSProprietaryStringEncoding =65536   /* Installation-specific encoding */

};



#if !defined(_OBJC_UNICHAR_H_)

#define _OBJC_UNICHAR_H_

#endif

#define NS_UNICHAR_IS_EIGHT_BIT 0



@interface NSSimpleCString :NSString {

@package

   char *bytes;

   int numBytes;

#if __LP64__

   int _unused;

#endif

}

@end



@interface NSConstantString :NSSimpleCString

@end



#if __LP64__

#else

externvoid *_NSConstantStringClassReference;

#endif