NSString部分属性和方法介绍
来源：互联网 发布：uv数据 编辑：程序博客网 时间：2024/06/01 10:41
// 指定编码和字节数初始化NSString对象
- (instancetype)initWithBytes:(const void *)bytes
length:(NSUInteger)length
encoding:(NSStringEncoding)encoding
// 指定缓冲区，编码和字节数初始化NSString对象
- (instancetype)initWithBytesNoCopy:(void *)bytes
length:(NSUInteger)length
encoding:(NSStringEncoding)encoding
freeWhenDone:(BOOL)flag
// 指定unichar字符，字节长度初始化NSSting 对象
- (instancetype)initWithCharacters:(const unichar *)characters
length:(NSUInteger)length
// 指定缓冲区，编码和字节长度初始化NSSting 对象
- (instancetype)initWithCharactersNoCopy:(unichar *)characters
length:(NSUInteger)length
freeWhenDone:(BOOL)flag
// 指定编码初始化C字符串
- (instancetype)initWithCString:(const char *)nullTerminatedCString
encoding:(NSStringEncoding)encoding
// char 转化为NSString对象
- (instancetype)initWithUTF8String:(const char *)bytes
// 本地化格式化字符串初始化NSSting 对象
- (instancetype)initWithFormat:(NSString *)format
arguments:(va_list)argList
- (instancetype)initWithFormat:(NSString *)format
locale:(id)locale
- (instancetype)initWithFormat:(NSString *)format
locale:(id)locale
arguments:(va_list)argList
- (instancetype)initWithData:(NSData *)data
encoding:(NSStringEncoding)encoding
- (instancetype)initWithContentsOfFile:(NSString *)path
encoding:(NSStringEncoding)enc
error:(NSError * _Nullable *)error
- (instancetype)initWithContentsOfFile:(NSString *)path
usedEncoding:(NSStringEncoding *)enc
error:(NSError * _Nullable *)error
// 写入文件
atomically:如果为YES则保证文件的写入原子性,就是说会先创建一个临时文件,直到文件内容写入成功再导入到目标文件里.
如果为NO,则直接写入目标文件里
- (BOOL)writeToFile:(NSString *)path
atomically:(BOOL)useAuxiliaryFile
encoding:(NSStringEncoding)enc
error:(NSError * _Nullable *)error
- (BOOL)writeToURL:(NSURL *)url
atomically:(BOOL)useAuxiliaryFile
encoding:(NSStringEncoding)enc
error:(NSError * _Nullable *)error
// 字符串编码时需要用的字节长度
- (NSUInteger)lengthOfBytesUsingEncoding:(NSStringEncoding)enc
// 字符串编码时需要用到最大字节长度
- (NSUInteger)maximumLengthOfBytesUsingEncoding:(NSStringEncoding)enc
// 返回在字符串中的某个位置的字符
- (unichar)characterAtIndex:(NSUInteger)index
// 截取字符串指定段,返回类型unichar
- (void)getCharacters:(unichar *)buffer
range:(NSRange)aRange
// 指定缓冲区转换
- (BOOL)getBytes:(void *)buffer
maxLength:(NSUInteger)maxBufferCount
usedLength:(NSUInteger *)usedBufferCount
encoding:(NSStringEncoding)encoding
options:(NSStringEncodingConversionOptions)options
range:(NSRange)range
remainingRange:(NSRangePointer)leftover
// char编码转换
- (const char *)cStringUsingEncoding:(NSStringEncoding)encoding
// 指定最大缓冲区长度进行char编码转换
- (BOOL)getCString:(char *)buffer
maxLength:(NSUInteger)maxBufferCount
encoding:(NSStringEncoding)encoding
// UTF8字符串
@property(readonly) const char *UTF8String
// 比较字符串，不考虑大小写
- (NSComparisonResult)caseInsensitiveCompare:(NSString *)aString
// 本地化比较字符串，不考虑大小写
- (NSComparisonResult)localizedCaseInsensitiveCompare:(NSString *)aString
// 比较字符串，考虑大小写
- (NSComparisonResult)compare:(NSString *)aString
// 本地化比较字符串，考虑大小写
- (NSComparisonResult)localizedCompare:(NSString *)aString
// 以某些条件比较字符串
enum{
NSCaseInsensitiveSearch = 1,//不区分大小写比较
NSLiteralSearch = 2,//区分大小写比较
NSBackwardsSearch = 4,//从字符串末尾开始搜索
NSAnchoredSearch = 8,//搜索限制范围的字符串
NSNumbericSearch = 64//按照字符串里的数字为依据，算出顺序。例如 Foo2.txt < Foo7.txt < Foo25.txt
NSDiacriticInsensitiveSearch = 128,//忽略 "-" 符号的比较
NSWidthInsensitiveSearch = 256,//忽略字符串的长度，比较出结果
NSForcedOrderingSearch = 512//忽略不区分大小写比较的选项，并强制返回 NSOrderedAscending 或者 NSOrderedDescending
NSRegularExpressionSearch = 1024//只能应用于 rangeOfString:..., stringByReplacingOccurrencesOfString:...和 replaceOccurrencesOfString:... 方法。使用通用兼容的比较方法，如果设置此项，可以去掉 NSCaseInsensitiveSearch 和 NSAnchoredSearch
}
- (NSComparisonResult)compare:(NSString *)aString
options:(NSStringCompareOptions)mask
// 以某些条件比较字符串的指定段
- (NSComparisonResult)compare:(NSString *)aString
options:(NSStringCompareOptions)mask
range:(NSRange)range
// 以某些条件本地化比较字符串的指定段
- (NSComparisonResult)compare:(NSString *)aString
options:(NSStringCompareOptions)mask
range:(NSRange)range
locale:(id)locale
// 字符串的hash地址
@property(readonly) NSUInteger hash
// 向字符串中循环添加指定字符串到指定长度
newLength 添加到指定长度
padString 指定字符串
padIndex 从指定字符串的padIndex开始添加
- (NSString *)stringByPaddingToLength:(NSUInteger)newLength
withString:(NSString *)padString
startingAtIndex:(NSUInteger)padIndex
// 分割字符串，转化为数组
- (NSArray<NSString *> *)componentsSeparatedByString:(NSString *)separator
// 依据字符编码，分割字符串
- (NSArray<NSString *> *)componentsSeparatedByCharactersInSet:(NSCharacterSet *)separator
// 修剪字符串
- (NSString *)stringByTrimmingCharactersInSet:(NSCharacterSet *)set
// 判断是否包含字符串，忽略大小写
- (BOOL)localizedCaseInsensitiveContainsString:(NSString *)str
- (BOOL)localizedStandardContainsString:(NSString *)str
- (NSRange)localizedStandardRangeOfString:(NSString *)str
// 指定字符集搜索
- (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet
- (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet
options:(NSStringCompareOptions)mask
- (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet
options:(NSStringCompareOptions)mask
range:(NSRange)aRange
// 枚举字符串所有行
- (void)enumerateLinesUsingBlock:(void (^)(NSString *line,
BOOL *stop))block
// 检查是否在指定范围内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))block
// 字符串指定区域段替换
- (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target
withString:(NSString *)replacement
options:(NSStringCompareOptions)options
range:(NSRange)searchRange
// 指定区域段字符串替换
- (NSString *)stringByReplacingCharactersInRange:(NSRange)range
withString:(NSString *)replacement
// 返回指定开始索引到结束索引，指定段的字符串
- (void)getLineStart:(NSUInteger *)startIndex
end:(NSUInteger *)lineEndIndex
contentsEnd:(NSUInteger *)contentsEndIndex
forRange:(NSRange)aRange
// 返回字符串指定段的位置和长度
- (NSRange)lineRangeForRange:(NSRange)aRange
// 指定段分段取字符串
- (void)getParagraphStart:(NSUInteger *)startIndex
end:(NSUInteger *)endIndex
contentsEnd:(NSUInteger *)contentsEndIndex
forRange:(NSRange)aRange
// 指定段分段的位置和长度
- (NSRange)paragraphRangeForRange:(NSRange)aRange
// 以字符串的字符编码指定索引查找位置
- (NSRange)rangeOfComposedCharacterSequenceAtIndex:(NSUInteger)anIndex
// 以字符串的字符编码指定区域段查找位置
- (NSRange)rangeOfComposedCharacterSequencesForRange:(NSRange)range
// 字符串转化为属性列表
- (id)propertyList
// 字符串转化为字典
- (NSDictionary *)propertyListFromStringsFileFormat
// 字符串绘制
- (void)drawAtPoint:(CGPoint)point
withAttributes:(NSDictionary<NSString *,
id> *)attrs
- (void)drawInRect:(CGRect)rect
withAttributes:(NSDictionary<NSString *,
id> *)attrs
- (void)drawWithRect:(CGRect)rect
options:(NSStringDrawingOptions)options
attributes:(NSDictionary<NSString *,
id> *)attributes
context:(NSStringDrawingContext *)context
// 本地化字符串折叠
- (NSString *)stringByFoldingWithOptions:(NSStringCompareOptions)options
locale:(NSLocale *)locale
// 返回公共前缀字符串
- (NSString *)commonPrefixWithString:(NSString *)aString
options:(NSStringCompareOptions)mask
// 所有单词首字母转化大写
@property(readonly, copy) NSString *capitalizedString
//Unicode范式D标准化
@property(readonly, copy) NSString *decomposedStringWithCanonicalMapping
//Unicode范式KD标准化
@property(readonly, copy) NSString *decomposedStringWithCompatibilityMapping
//Unicode范式C标准化
@property(readonly, copy) NSString *precomposedStringWithCanonicalMapping
//Unicode范式KC标准化
@property(readonly, copy) NSString *precomposedStringWithCompatibilityMapping
// 当前编码值
+ (const NSStringEncoding *)availableStringEncodings
// 默认C字符串编码
+ (NSStringEncoding)defaultCStringEncoding
// 对一份data数据进行转换为字符串，有可选option字典，另外还有是否允许有损失，最终转换之后返回一个编码种类。下面是7种不同option字典选项
+ (NSStringEncoding)stringEncodingForData:(NSData *)data
encodingOptions:(NSDictionary<NSString *, id> *)opts
convertedString:(NSString * _Nullable *)string
usedLossyConversion:(BOOL *)usedLossyConversion
// 编码的名称
+ (NSString *)localizedNameOfStringEncoding:(NSStringEncoding)encoding
// 判断是否可以无损转化编码
- (BOOL)canBeConvertedToEncoding:(NSStringEncoding)encoding
// 返回指定编码的NSData对象
- (NSData *)dataUsingEncoding:(NSStringEncoding)encoding
// 返回指定编码的NSData对象，可以选择无损转化
- (NSData *)dataUsingEncoding:(NSStringEncoding)encoding
allowLossyConversion:(BOOL)flag
// 字符串最快编码值
@property(readonly) NSStringEncoding fastestEncoding
// 字符串最小编码值
@property(readonly) NSStringEncoding smallestEncoding
// 将数组中的字符串组合成一个文件路径
+ (NSString *)pathWithComponents:(NSArray<NSString *> *)components
// 将一个路径分割成一个数组
@property(readonly, copy) NSArray <NSString *> *pathComponents
- (NSUInteger)completePathIntoString:(NSString * _Nonnull *)outputName
caseSensitive:(BOOL)flag
matchesIntoArray:(NSArray<NSString *> * _Nonnull *)outputArray
filterTypes:(NSArray<NSString *> *)filterTypes
// 将这个字符串转换成文件系统的规范形式然后用 UTF-8 编码
@property(readonly) const char *fileSystemRepresentation
//扩展路径
@property(getter=isAbsolutePath, readonly) BOOL absolutePath
// 路径的最后一部分
@property(readonly, copy) NSString *lastPathComponent
// 从路径最后一个组成部分中提取扩展名
@property(readonly, copy) NSString *pathExtension
// 把当前用户的主目录替换为波浪号
/User/mike/textFile.txt -----> ~/textFile.txt
@property(readonly, copy) NSString *stringByAbbreviatingWithTildeInPath
// 将String添加到现有路径末尾
- (NSString *)stringByAppendingPathComponent:(NSString *)aString
// 给当前路径添加扩展名
- (NSString *)stringByAppendingPathExtension:(NSString *)ext
// 删除路径的最后一部分后的字符串
@property(readonly, copy) NSString *stringByDeletingLastPathComponent
// 删除路径扩展名后的字符串
@property(readonly, copy) NSString *stringByDeletingPathExtension
// 把波浪号替换为当前用户的主目录
~/textFile.txt -----> /User/mike/textFile.txt
@property(readonly, copy) NSString *stringByExpandingTildeInPath
// 将路径中的代字符扩展成用户主目录(~)或指定用户的主目录(~user)
@property(readonly, copy) NSString *stringByResolvingSymlinksInPath
// 尝试解析路径中的符号链接
@property(readonly, copy) NSString *stringByStandardizingPath
// 返回添加指定路径数组后的路径数组
- (NSArray<NSString *> *)stringsByAppendingPaths:(NSArray<NSString *> *)paths
// Percent-Encoding
- (NSString *)stringByAddingPercentEncodingWithAllowedCharacters:(NSCharacterSet *)allowedCharacters
// 去掉Percent-Encoding后的字符串
@property(readonly, copy) NSString *stringByRemovingPercentEncoding
// 分析句中单词的词性
- (void)enumerateLinguisticTagsInRange:(NSRange)range
scheme:(NSString *)tagScheme
options:(NSLinguisticTaggerOptions)opts
orthography:(NSOrthography *)orthography
usingBlock:(void (^)(NSString *tag,
NSRange tokenRange,
NSRange sentenceRange,
BOOL *stop))block
- (NSArray<NSString *> *)linguisticTagsInRange:(NSRange)range
scheme:(NSString *)tagScheme
options:(NSLinguisticTaggerOptions)opts
orthography:(NSOrthography *)orthography
tokenRanges:(NSArray<NSValue *> * _Nullable *)tokenRanges
- (instancetype)initWithBytes:(const void *)bytes
length:(NSUInteger)length
encoding:(NSStringEncoding)encoding
// 指定缓冲区，编码和字节数初始化NSString对象
- (instancetype)initWithBytesNoCopy:(void *)bytes
length:(NSUInteger)length
encoding:(NSStringEncoding)encoding
freeWhenDone:(BOOL)flag
// 指定unichar字符，字节长度初始化NSSting 对象
- (instancetype)initWithCharacters:(const unichar *)characters
length:(NSUInteger)length
// 指定缓冲区，编码和字节长度初始化NSSting 对象
- (instancetype)initWithCharactersNoCopy:(unichar *)characters
length:(NSUInteger)length
freeWhenDone:(BOOL)flag
// 指定编码初始化C字符串
- (instancetype)initWithCString:(const char *)nullTerminatedCString
encoding:(NSStringEncoding)encoding
// char 转化为NSString对象
- (instancetype)initWithUTF8String:(const char *)bytes
// 本地化格式化字符串初始化NSSting 对象
- (instancetype)initWithFormat:(NSString *)format
arguments:(va_list)argList
- (instancetype)initWithFormat:(NSString *)format
locale:(id)locale
- (instancetype)initWithFormat:(NSString *)format
locale:(id)locale
arguments:(va_list)argList
- (instancetype)initWithData:(NSData *)data
encoding:(NSStringEncoding)encoding
- (instancetype)initWithContentsOfFile:(NSString *)path
encoding:(NSStringEncoding)enc
error:(NSError * _Nullable *)error
- (instancetype)initWithContentsOfFile:(NSString *)path
usedEncoding:(NSStringEncoding *)enc
error:(NSError * _Nullable *)error
// 写入文件
atomically:如果为YES则保证文件的写入原子性,就是说会先创建一个临时文件,直到文件内容写入成功再导入到目标文件里.
如果为NO,则直接写入目标文件里
- (BOOL)writeToFile:(NSString *)path
atomically:(BOOL)useAuxiliaryFile
encoding:(NSStringEncoding)enc
error:(NSError * _Nullable *)error
- (BOOL)writeToURL:(NSURL *)url
atomically:(BOOL)useAuxiliaryFile
encoding:(NSStringEncoding)enc
error:(NSError * _Nullable *)error
// 字符串编码时需要用的字节长度
- (NSUInteger)lengthOfBytesUsingEncoding:(NSStringEncoding)enc
// 字符串编码时需要用到最大字节长度
- (NSUInteger)maximumLengthOfBytesUsingEncoding:(NSStringEncoding)enc
// 返回在字符串中的某个位置的字符
- (unichar)characterAtIndex:(NSUInteger)index
// 截取字符串指定段,返回类型unichar
- (void)getCharacters:(unichar *)buffer
range:(NSRange)aRange
// 指定缓冲区转换
- (BOOL)getBytes:(void *)buffer
maxLength:(NSUInteger)maxBufferCount
usedLength:(NSUInteger *)usedBufferCount
encoding:(NSStringEncoding)encoding
options:(NSStringEncodingConversionOptions)options
range:(NSRange)range
remainingRange:(NSRangePointer)leftover
// char编码转换
- (const char *)cStringUsingEncoding:(NSStringEncoding)encoding
// 指定最大缓冲区长度进行char编码转换
- (BOOL)getCString:(char *)buffer
maxLength:(NSUInteger)maxBufferCount
encoding:(NSStringEncoding)encoding
// UTF8字符串
@property(readonly) const char *UTF8String
// 比较字符串，不考虑大小写
- (NSComparisonResult)caseInsensitiveCompare:(NSString *)aString
// 本地化比较字符串，不考虑大小写
- (NSComparisonResult)localizedCaseInsensitiveCompare:(NSString *)aString
// 比较字符串，考虑大小写
- (NSComparisonResult)compare:(NSString *)aString
// 本地化比较字符串，考虑大小写
- (NSComparisonResult)localizedCompare:(NSString *)aString
// 以某些条件比较字符串
enum{
NSCaseInsensitiveSearch = 1,//不区分大小写比较
NSLiteralSearch = 2,//区分大小写比较
NSBackwardsSearch = 4,//从字符串末尾开始搜索
NSAnchoredSearch = 8,//搜索限制范围的字符串
NSNumbericSearch = 64//按照字符串里的数字为依据，算出顺序。例如 Foo2.txt < Foo7.txt < Foo25.txt
NSDiacriticInsensitiveSearch = 128,//忽略 "-" 符号的比较
NSWidthInsensitiveSearch = 256,//忽略字符串的长度，比较出结果
NSForcedOrderingSearch = 512//忽略不区分大小写比较的选项，并强制返回 NSOrderedAscending 或者 NSOrderedDescending
NSRegularExpressionSearch = 1024//只能应用于 rangeOfString:..., stringByReplacingOccurrencesOfString:...和 replaceOccurrencesOfString:... 方法。使用通用兼容的比较方法，如果设置此项，可以去掉 NSCaseInsensitiveSearch 和 NSAnchoredSearch
}
- (NSComparisonResult)compare:(NSString *)aString
options:(NSStringCompareOptions)mask
// 以某些条件比较字符串的指定段
- (NSComparisonResult)compare:(NSString *)aString
options:(NSStringCompareOptions)mask
range:(NSRange)range
// 以某些条件本地化比较字符串的指定段
- (NSComparisonResult)compare:(NSString *)aString
options:(NSStringCompareOptions)mask
range:(NSRange)range
locale:(id)locale
// 字符串的hash地址
@property(readonly) NSUInteger hash
// 向字符串中循环添加指定字符串到指定长度
newLength 添加到指定长度
padString 指定字符串
padIndex 从指定字符串的padIndex开始添加
- (NSString *)stringByPaddingToLength:(NSUInteger)newLength
withString:(NSString *)padString
startingAtIndex:(NSUInteger)padIndex
// 分割字符串，转化为数组
- (NSArray<NSString *> *)componentsSeparatedByString:(NSString *)separator
// 依据字符编码，分割字符串
- (NSArray<NSString *> *)componentsSeparatedByCharactersInSet:(NSCharacterSet *)separator
// 修剪字符串
- (NSString *)stringByTrimmingCharactersInSet:(NSCharacterSet *)set
// 判断是否包含字符串，忽略大小写
- (BOOL)localizedCaseInsensitiveContainsString:(NSString *)str
- (BOOL)localizedStandardContainsString:(NSString *)str
- (NSRange)localizedStandardRangeOfString:(NSString *)str
// 指定字符集搜索
- (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet
- (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet
options:(NSStringCompareOptions)mask
- (NSRange)rangeOfCharacterFromSet:(NSCharacterSet *)aSet
options:(NSStringCompareOptions)mask
range:(NSRange)aRange
// 枚举字符串所有行
- (void)enumerateLinesUsingBlock:(void (^)(NSString *line,
BOOL *stop))block
// 检查是否在指定范围内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))block
// 字符串指定区域段替换
- (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target
withString:(NSString *)replacement
options:(NSStringCompareOptions)options
range:(NSRange)searchRange
// 指定区域段字符串替换
- (NSString *)stringByReplacingCharactersInRange:(NSRange)range
withString:(NSString *)replacement
// 返回指定开始索引到结束索引，指定段的字符串
- (void)getLineStart:(NSUInteger *)startIndex
end:(NSUInteger *)lineEndIndex
contentsEnd:(NSUInteger *)contentsEndIndex
forRange:(NSRange)aRange
// 返回字符串指定段的位置和长度
- (NSRange)lineRangeForRange:(NSRange)aRange
// 指定段分段取字符串
- (void)getParagraphStart:(NSUInteger *)startIndex
end:(NSUInteger *)endIndex
contentsEnd:(NSUInteger *)contentsEndIndex
forRange:(NSRange)aRange
// 指定段分段的位置和长度
- (NSRange)paragraphRangeForRange:(NSRange)aRange
// 以字符串的字符编码指定索引查找位置
- (NSRange)rangeOfComposedCharacterSequenceAtIndex:(NSUInteger)anIndex
// 以字符串的字符编码指定区域段查找位置
- (NSRange)rangeOfComposedCharacterSequencesForRange:(NSRange)range
// 字符串转化为属性列表
- (id)propertyList
// 字符串转化为字典
- (NSDictionary *)propertyListFromStringsFileFormat
// 字符串绘制
- (void)drawAtPoint:(CGPoint)point
withAttributes:(NSDictionary<NSString *,
id> *)attrs
- (void)drawInRect:(CGRect)rect
withAttributes:(NSDictionary<NSString *,
id> *)attrs
- (void)drawWithRect:(CGRect)rect
options:(NSStringDrawingOptions)options
attributes:(NSDictionary<NSString *,
id> *)attributes
context:(NSStringDrawingContext *)context
// 本地化字符串折叠
- (NSString *)stringByFoldingWithOptions:(NSStringCompareOptions)options
locale:(NSLocale *)locale
// 返回公共前缀字符串
- (NSString *)commonPrefixWithString:(NSString *)aString
options:(NSStringCompareOptions)mask
// 所有单词首字母转化大写
@property(readonly, copy) NSString *capitalizedString
//Unicode范式D标准化
@property(readonly, copy) NSString *decomposedStringWithCanonicalMapping
//Unicode范式KD标准化
@property(readonly, copy) NSString *decomposedStringWithCompatibilityMapping
//Unicode范式C标准化
@property(readonly, copy) NSString *precomposedStringWithCanonicalMapping
//Unicode范式KC标准化
@property(readonly, copy) NSString *precomposedStringWithCompatibilityMapping
// 当前编码值
+ (const NSStringEncoding *)availableStringEncodings
// 默认C字符串编码
+ (NSStringEncoding)defaultCStringEncoding
// 对一份data数据进行转换为字符串，有可选option字典，另外还有是否允许有损失，最终转换之后返回一个编码种类。下面是7种不同option字典选项
+ (NSStringEncoding)stringEncodingForData:(NSData *)data
encodingOptions:(NSDictionary<NSString *, id> *)opts
convertedString:(NSString * _Nullable *)string
usedLossyConversion:(BOOL *)usedLossyConversion
// 编码的名称
+ (NSString *)localizedNameOfStringEncoding:(NSStringEncoding)encoding
// 判断是否可以无损转化编码
- (BOOL)canBeConvertedToEncoding:(NSStringEncoding)encoding
// 返回指定编码的NSData对象
- (NSData *)dataUsingEncoding:(NSStringEncoding)encoding
// 返回指定编码的NSData对象，可以选择无损转化
- (NSData *)dataUsingEncoding:(NSStringEncoding)encoding
allowLossyConversion:(BOOL)flag
// 字符串最快编码值
@property(readonly) NSStringEncoding fastestEncoding
// 字符串最小编码值
@property(readonly) NSStringEncoding smallestEncoding
// 将数组中的字符串组合成一个文件路径
+ (NSString *)pathWithComponents:(NSArray<NSString *> *)components
// 将一个路径分割成一个数组
@property(readonly, copy) NSArray <NSString *> *pathComponents
- (NSUInteger)completePathIntoString:(NSString * _Nonnull *)outputName
caseSensitive:(BOOL)flag
matchesIntoArray:(NSArray<NSString *> * _Nonnull *)outputArray
filterTypes:(NSArray<NSString *> *)filterTypes
// 将这个字符串转换成文件系统的规范形式然后用 UTF-8 编码
@property(readonly) const char *fileSystemRepresentation
//扩展路径
@property(getter=isAbsolutePath, readonly) BOOL absolutePath
// 路径的最后一部分
@property(readonly, copy) NSString *lastPathComponent
// 从路径最后一个组成部分中提取扩展名
@property(readonly, copy) NSString *pathExtension
// 把当前用户的主目录替换为波浪号
/User/mike/textFile.txt -----> ~/textFile.txt
@property(readonly, copy) NSString *stringByAbbreviatingWithTildeInPath
// 将String添加到现有路径末尾
- (NSString *)stringByAppendingPathComponent:(NSString *)aString
// 给当前路径添加扩展名
- (NSString *)stringByAppendingPathExtension:(NSString *)ext
// 删除路径的最后一部分后的字符串
@property(readonly, copy) NSString *stringByDeletingLastPathComponent
// 删除路径扩展名后的字符串
@property(readonly, copy) NSString *stringByDeletingPathExtension
// 把波浪号替换为当前用户的主目录
~/textFile.txt -----> /User/mike/textFile.txt
@property(readonly, copy) NSString *stringByExpandingTildeInPath
// 将路径中的代字符扩展成用户主目录(~)或指定用户的主目录(~user)
@property(readonly, copy) NSString *stringByResolvingSymlinksInPath
// 尝试解析路径中的符号链接
@property(readonly, copy) NSString *stringByStandardizingPath
// 返回添加指定路径数组后的路径数组
- (NSArray<NSString *> *)stringsByAppendingPaths:(NSArray<NSString *> *)paths
// Percent-Encoding
- (NSString *)stringByAddingPercentEncodingWithAllowedCharacters:(NSCharacterSet *)allowedCharacters
// 去掉Percent-Encoding后的字符串
@property(readonly, copy) NSString *stringByRemovingPercentEncoding
// 分析句中单词的词性
- (void)enumerateLinguisticTagsInRange:(NSRange)range
scheme:(NSString *)tagScheme
options:(NSLinguisticTaggerOptions)opts
orthography:(NSOrthography *)orthography
usingBlock:(void (^)(NSString *tag,
NSRange tokenRange,
NSRange sentenceRange,
BOOL *stop))block
- (NSArray<NSString *> *)linguisticTagsInRange:(NSRange)range
scheme:(NSString *)tagScheme
options:(NSLinguisticTaggerOptions)opts
orthography:(NSOrthography *)orthography
tokenRanges:(NSArray<NSValue *> * _Nullable *)tokenRanges
0 0
- NSString部分属性和方法介绍
- UIViewController部分属性和方法介绍
- NSString基本属性和方法
- NSString的常见属性和方法
- NSString进行比较的方法和属性
- zTree【部分函数和属性介绍】
- OC--关于NSString的所有方法和属性
- OC-NSString基本使用和常用方法介绍
- treeview属性和方法介绍
- 接收--方法和属性介绍
- UIView部分方法和属性总结
- UIView部分属性介绍
- NSString copy和retain属性
- NSString常用属性和用法
- NSString NSArray NSDictionary NSSet 中的部分方法
- 发送请求--方法和属性介绍
- SVG DOM常用属性和方法介绍
- XMLHTTPRequest的方法和属性介绍
- java网络编程——基于UDP和TCP协议的小例子
- headerVIew不随tableView 滚动
- 优化 Go 中的 map 并发存取
- Eclipse快捷键 10个最有用的快捷键
- .sh文件中的首行 #!/bin/bash 以及 bad interpreter: Text file busy 文本文件忙错误
- NSString部分属性和方法介绍
- Linux mysql二进制包的安装
- 超详细：用图诠释Android Studio调试技巧
- lintcode打劫房屋
- google地图地理编码与反编码
- 6 机器学习实践之手写数字识别-卷积神经网络实现
- retrofit2.0的简单使用
- 《Hadoop常见问题整理》
- ajax 定时局部刷新
