iOS 基礎類解析 - NSString

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NSString 類參考
NSString Class Reference

繼承自
Inherits from NSObject 遵循的協議
Conforms to NSCopying
NSMutableCopying
NSSecureCoding
NSObject (NSObject)
所在框架
Framework /System/Library/Frameworks/Foundation.framework 可用於的 iOS 版本
Availability Available in iOS 2.0 and later. 聲明於頭文件
Declared in NSLinguisticTagger.h
NSPathUtilities.h
NSString.h
NSURL.h
配套的開發指南
Companion guides String Programming Guide
Property List Programming Guide
相關的示例代碼
Related sample code AdvancedURLConnections AirDrop Examples BonjourWeb MVCNetworking TableView Fundamentals for iOS

創建和初始化字符串
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 iOS 2.0
• + stringWithCString:length: Deprecated in iOS 2.0
• – initWithCString: Deprecated in iOS 2.0
• – initWithCString:length: Deprecated in iOS 2.0
• – initWithCStringNoCopy:length:freeWhenDone: Deprecated in iOS 2.0

  從一個文件創建和初始化字符串
  Creating and Initializing a String from a File

  • + stringWithContentsOfFile:encoding:error:
  • – initWithContentsOfFile:encoding:error:
  • + stringWithContentsOfFile:usedEncoding:error:
  • – initWithContentsOfFile:usedEncoding:error:
  • + stringWithContentsOfFile: Deprecated in iOS 2.0
  • – initWithContentsOfFile: Deprecated in iOS 2.0

    從一個 URL 創建和初始化字符串
    Creating and Initializing a String from an URL

    • + stringWithContentsOfURL:encoding:error:
    • – initWithContentsOfURL:encoding:error:
    • + stringWithContentsOfURL:usedEncoding:error:
    • – initWithContentsOfURL:usedEncoding:error:
    • + stringWithContentsOfURL: Deprecated in iOS 2.0
    • – initWithContentsOfURL: Deprecated in iOS 2.0

      將字符串內容寫到文件或 URL
      Writing to a File or URL

      • – writeToFile:atomically:encoding:error:
      • – writeToURL:atomically:encoding:error:
      • – writeToFile:atomically: Deprecated in iOS 2.0
      • – writeToURL:atomically: Deprecated in iOS 2.0

        獲取字符串長度
        Getting a String’s Length

        • – length
        • – lengthOfBytesUsingEncoding:
        • – maximumLengthOfBytesUsingEncoding:

          獲取字符和字節
          Getting Characters and Bytes

          • – characterAtIndex:
          • – getCharacters:range:
          • – getBytes:maxLength:usedLength:encoding:options:range:remainingRange:
          • – getCharacters: Deprecated in iOS 4.0

            獲取 C 字符串
            Getting C Strings

            • – cStringUsingEncoding:
            • – getCString:maxLength:encoding:
            • – UTF8String
            • – cString Deprecated in iOS 2.0
            • – cStringLength Deprecated in iOS 2.0
            • – getCString: Deprecated in iOS 2.0
            • – getCString:maxLength: Deprecated in iOS 2.0
            • – getCString:maxLength:range:remainingRange: Deprecated in iOS 2.0
            • – lossyCString Deprecated in iOS 2.0

              拼接字符串
              Combining Strings

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

                拆分字符串
                Dividing Strings

                • – componentsSeparatedByString:
                • – componentsSeparatedByCharactersInSet:
                • – stringByTrimmingCharactersInSet:
                • – substringFromIndex:
                • – substringWithRange:
                • – substringToIndex:

                  查找字符和子字符串
                  Finding Characters and Substrings

                  • – rangeOfCharacterFromSet:
                  • – rangeOfCharacterFromSet:options:
                  • – rangeOfCharacterFromSet:options:range:
                  • – rangeOfString:
                  • – rangeOfString:options:
                  • – rangeOfString:options:range:
                  • – rangeOfString:options:range:locale:
                  • – enumerateLinesUsingBlock:
                  • – enumerateSubstringsInRange:options:usingBlock:

                    替換字符串
                    Replacing Substrings

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

                      確定行和段落的范圍
                      Determining Line and Paragraph Ranges

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

                        確定組成字符的順序*
                        Determining Composed Character Sequences

                        • – rangeOfComposedCharacterSequenceAtIndex:
                        • – rangeOfComposedCharacterSequencesForRange:

                          將字符串內容轉換成屬性列表
                          Converting String Contents Into a Property List

                          • – propertyList
                          • – propertyListFromStringsFileFormat

                            識別和比較字符串
                            Identifying and Comparing Strings

                            • – caseInsensitiveCompare:
                            • – localizedCaseInsensitiveCompare:
                            • – compare:
                            • – localizedCompare:
                            • – compare:options:
                            • – compare:options:range:
                            • – compare:options:range:locale:
                            • – localizedStandardCompare:
                            • – hasPrefix:
                            • – hasSuffix:
                            • – isEqualToString:
                            • – hash

                              拆疊字符串*
                              Folding Strings

                              • – stringByFoldingWithOptions:locale:

                                獲取公共的前綴
                                Getting a Shared Prefix

                                • – commonPrefixWithString:options:

                                  改變大小寫
                                  Changing Case

                                  • – capitalizedString
                                  • – capitalizedStringWithLocale:
                                  • – lowercaseString
                                  • – lowercaseStringWithLocale:
                                  • – uppercaseString
                                  • – uppercaseStringWithLocale:

                                    使用映射獲取多個字符串*
                                    Getting Strings with Mapping

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

                                      獲取數字值
                                      Getting Numeric Values

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

                                        處理字符編碼
                                        Working with Encodings

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

                                          處理路徑
                                          Working with Paths

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

                                            處理 URL
                                            Working with URLs

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

                                              語言標記和分析*
                                              Linguistic Tagging and Analysis

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

                                                
                                                

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