Ojbect-C2 4、NSDictionary和NSMutableDictionary字典的使用

Adopted Protocols

NSCoding

• encodeWithCoder:

• initWithCoder:

NSCopying

• copyWithZone:

NSMutableCopying

• mutableCopyWithZone:

NSFastEnumeration

• countByEnumeratingWithState:objects:count:

Tasks

Creating a Dictionary

• + dictionary
• + dictionaryWithContentsOfFile:
• + dictionaryWithContentsOfURL:
• + dictionaryWithDictionary:
• + dictionaryWithObject:forKey:
• + dictionaryWithObjects:forKeys:
• + dictionaryWithObjects:forKeys:count:
• + dictionaryWithObjectsAndKeys:

Initializing an NSDictionary Instance

• – initWithContentsOfFile:
• – initWithContentsOfURL:
• – initWithDictionary:
• – initWithDictionary:copyItems:
• – initWithObjects:forKeys:
• – initWithObjects:forKeys:count:
• – initWithObjectsAndKeys:
• – init

Creating Key Sets for Shared-Key Optimized Dictionaries

• + sharedKeySetForKeys:

Counting Entries

• – count

Comparing Dictionaries

• – isEqualToDictionary:

Accessing Keys and Values

• – allKeys
• – allKeysForObject:
• – allValues
• – getObjects:andKeys:
• – objectForKey:
• – objectForKeyedSubscript:
• – objectsForKeys:notFoundMarker:
• – valueForKey:

Enumerating Dictionaries

• – keyEnumerator
• – objectEnumerator
• – enumerateKeysAndObjectsUsingBlock:
• – enumerateKeysAndObjectsWithOptions:usingBlock:

Sorting Dictionaries

• – keysSortedByValueUsingSelector:
• – keysSortedByValueUsingComparator:
• – keysSortedByValueWithOptions:usingComparator:

Filtering Dictionaries

• – keysOfEntriesPassingTest:
• – keysOfEntriesWithOptions:passingTest:

Storing Dictionaries

• – writeToFile:atomically:
• – writeToURL:atomically:

Accessing File Attributes

• – fileCreationDate
• – fileExtensionHidden
• – fileGroupOwnerAccountID
• – fileGroupOwnerAccountName
• – fileHFSCreatorCode
• – fileHFSTypeCode
• – fileIsAppendOnly
• – fileIsImmutable
• – fileModificationDate
• – fileOwnerAccountID
• – fileOwnerAccountName
• – filePosixPermissions
• – fileSize
• – fileSystemFileNumber
• – fileSystemNumber
• – fileType

Creating a Description

• – description
• – descriptionInStringsFileFormat
• – descriptionWithLocale:
• – descriptionWithLocale:indent:

NSMutableDictionary

Tasks

Creating and Initializing a Mutable Dictionary

• + dictionaryWithCapacity:
• – initWithCapacity:
• – init
• + dictionaryWithSharedKeySet:

Adding Entries to a Mutable Dictionary

• – setObject:forKey:
• – setObject:forKeyedSubscript:
• – setValue:forKey:
• – addEntriesFromDictionary:
• – setDictionary:

Removing Entries From a Mutable Dictionary

• – removeObjectForKey:
• – removeAllObjects
• – removeObjectsForKeys: