Ojbect-C2 2、NSString和NSMutableString字符串的使用

Creating and Initializing Strings

• + string
• – init
• – initWithBytes:length:encoding:
• – initWithBytesNoCopy:length:encoding:freeWhenDone:
• – initWithCharacters:length:
• – initWithCharactersNoCopy:length:freeWhenDone:
• – initWithString:
• – initWithCString:encoding:
• – initWithUTF8String:
• – initWithFormat:
• – initWithFormat:arguments:
• – initWithFormat:locale:
• – initWithFormat:locale:arguments:
• – initWithData:encoding:
• + stringWithFormat:
• + localizedStringWithFormat:
• + stringWithCharacters:length:
• + stringWithString:
• + stringWithCString:encoding:
• + stringWithUTF8String:
• + stringWithCString: Deprecated in OS X v10.4
• + stringWithCString:length: Deprecated in OS X v10.4
• – initWithCString: Deprecated in OS X v10.4
• – initWithCString:length: Deprecated in OS X v10.4
• – initWithCStringNoCopy:length:freeWhenDone: Deprecated in OS X v10.4

Creating and Initializing a String from a File

• + stringWithContentsOfFile:encoding:error:
• – initWithContentsOfFile:encoding:error:
• + stringWithContentsOfFile:usedEncoding:error:
• – initWithContentsOfFile:usedEncoding:error:
• + stringWithContentsOfFile: Deprecated in OS X v10.4
• – initWithContentsOfFile: Deprecated in OS X v10.4

Creating and Initializing a String from an URL

• + stringWithContentsOfURL:encoding:error:
• – initWithContentsOfURL:encoding:error:
• + stringWithContentsOfURL:usedEncoding:error:
• – initWithContentsOfURL:usedEncoding:error:
• + stringWithContentsOfURL: Deprecated in OS X v10.4
• – initWithContentsOfURL: Deprecated in OS X v10.4

Writing to a File or URL

• – writeToFile:atomically:encoding:error:
• – writeToURL:atomically:encoding:error:
• – writeToFile:atomically: Deprecated in OS X v10.4
• – writeToURL:atomically: Deprecated in OS X v10.4

Getting a String’s Length

• – length
• – lengthOfBytesUsingEncoding:
• – maximumLengthOfBytesUsingEncoding:

Getting Characters and Bytes

• – characterAtIndex:
• – getCharacters:range:
• – getBytes:maxLength:usedLength:encoding:options:range:remainingRange:
• – getCharacters: Deprecated in OS X v10.6

Getting C Strings

• – cStringUsingEncoding:
• – getCString:maxLength:encoding:
• – UTF8String
• – cString Deprecated in OS X v10.4
• – cStringLength Deprecated in OS X v10.4
• – getCString: Deprecated in OS X v10.4
• – getCString:maxLength: Deprecated in OS X v10.4
• – getCString:maxLength:range:remainingRange: Deprecated in OS X v10.4
• – lossyCString Deprecated in OS X v10.4

Combining Strings   --字符串拼接

• – stringByAppendingFormat:
• – stringByAppendingString:
• – stringByPaddingToLength:withString:startingAtIndex:

Dividing Strings    --字符串分割

• – componentsSeparatedByString:       --字符串转换成数组
• – componentsSeparatedByCharactersInSet:
• – stringByTrimmingCharactersInSet:
• – substringFromIndex:      --从。。。截取字符串
• – substringWithRange:    --从。。。开始截取多长的字符串
• – substringToIndex: --截取到。。。字符串

Finding Characters and Substrings   --查找字符串

• – rangeOfCharacterFromSet:
• – rangeOfCharacterFromSet:options:
• – rangeOfCharacterFromSet:options:range:
• – rangeOfString:   --查找字符串
• – rangeOfString:options:
• – rangeOfString:options:range:
• – rangeOfString:options:range:locale:
• – enumerateLinesUsingBlock:
• – enumerateSubstringsInRange:options:usingBlock:

Replacing Substrings

• – stringByReplacingOccurrencesOfString:withString:
• – stringByReplacingOccurrencesOfString:withString:options:range:
• – stringByReplacingCharactersInRange:withString:

Determining Line and Paragraph Ranges

• – getLineStart:end:contentsEnd:forRange:
• – lineRangeForRange:
• – getParagraphStart:end:contentsEnd:forRange:
• – paragraphRangeForRange:

Determining Composed Character Sequences

• – rangeOfComposedCharacterSequenceAtIndex:
• – rangeOfComposedCharacterSequencesForRange:

Converting String Contents Into a Property List

• – propertyList
• – propertyListFromStringsFileFormat

Identifying and Comparing Strings

• – caseInsensitiveCompare:        比较字符串大小
• – localizedCaseInsensitiveCompare:
• – compare:
• – localizedCompare:
• – compare:options:
• – compare:options:range:
• – compare:options:range:locale:
• – localizedStandardCompare:
• – hasPrefix:
• – hasSuffix:
• – isEqualToString:          比较字符串内容
• – hash

Folding Strings

• – stringByFoldingWithOptions:locale:

Getting a Shared Prefix

• – commonPrefixWithString:options:

Changing Case     

• – capitalizedString
• – capitalizedStringWithLocale:
• – lowercaseString                     全部小写
• – lowercaseStringWithLocale:
• – uppercaseString                     全部大写
• – uppercaseStringWithLocale:

Getting Strings with Mapping

• – decomposedStringWithCanonicalMapping
• – decomposedStringWithCompatibilityMapping
• – precomposedStringWithCanonicalMapping
• – precomposedStringWithCompatibilityMapping

Getting Numeric Values

• – doubleValue
• – floatValue
• – intValue
• – integerValue
• – longLongValue
• – boolValue

Working with Encodings

• + availableStringEncodings
• + defaultCStringEncoding
• + localizedNameOfStringEncoding:
• – canBeConvertedToEncoding:
• – dataUsingEncoding:
• – dataUsingEncoding:allowLossyConversion:
• – description
• – fastestEncoding
• – smallestEncoding

Working with Paths

• + pathWithComponents:
• – pathComponents
• – completePathIntoString:caseSensitive:matchesIntoArray:filterTypes:
• – fileSystemRepresentation
• – getFileSystemRepresentation:maxLength:
• – isAbsolutePath
• – lastPathComponent
• – pathExtension
• – stringByAbbreviatingWithTildeInPath
• – stringByAppendingPathComponent:
• – stringByAppendingPathExtension:
• – stringByDeletingLastPathComponent
• – stringByDeletingPathExtension
• – stringByExpandingTildeInPath
• – stringByResolvingSymlinksInPath
• – stringByStandardizingPath
• – stringsByAppendingPaths:

Working with URLs

• – stringByAddingPercentEscapesUsingEncoding:
• – stringByReplacingPercentEscapesUsingEncoding:
• – stringByAddingPercentEncodingWithAllowedCharacters:
• – stringByRemovingPercentEncoding

Linguistic Tagging and Analysis

• – enumerateLinguisticTagsInRange:scheme:options:orthography:usingBlock:
• – linguisticTagsInRange:scheme:options:orthography:tokenRanges:

NSMutableString 

Creating and Initializing a Mutable String

• + stringWithCapacity:
• – initWithCapacity:

Modifying a String

• – appendFormat:
• – appendString:
• – deleteCharactersInRange:
• – insertString:atIndex:
• – replaceCharactersInRange:withString:
• – replaceOccurrencesOfString:withString:options:range:
• – setString: