Ojbect-C2 3、NSArray和NSMutableArray数组的使用

Adopted Protocols

NSCoding

• encodeWithCoder:

• initWithCoder:

NSCopying

• copyWithZone:

NSMutableCopying

• mutableCopyWithZone:

NSFastEnumeration

• countByEnumeratingWithState:objects:count:

Tasks

Creating an Array

• + array
• + arrayWithArray:   --
• + arrayWithContentsOfFile: --从文件中初始化数组
• + arrayWithContentsOfURL:
• + arrayWithObject:   --只能初始化一个元素
• + arrayWithObjects: --初始化多个元素
• + arrayWithObjects:count:

Initializing an Array

• – init
• – initWithArray:
• – initWithArray:copyItems:
• – initWithContentsOfFile:
• – initWithContentsOfURL:
• – initWithObjects:
• – initWithObjects:count:

Querying an Array

• – containsObject:   -- 是否包含字符串
• – count --获取元素中的个数
• – getObjects:range:
• – firstObject
• – lastObject
• – objectAtIndex:   --访问数组中的某个元素
• – objectAtIndexedSubscript:
• – objectsAtIndexes:
• – objectEnumerator
• – reverseObjectEnumerator
• – getObjects: Deprecated in OS X v10.6

Finding Objects in an Array

• – indexOfObject:
• – indexOfObject:inRange:
• – indexOfObjectIdenticalTo:
• – indexOfObjectIdenticalTo:inRange:
• – indexOfObjectPassingTest:
• – indexOfObjectWithOptions:passingTest:
• – indexOfObjectAtIndexes:options:passingTest:
• – indexesOfObjectsPassingTest:
• – indexesOfObjectsWithOptions:passingTest:
• – indexesOfObjectsAtIndexes:options:passingTest:
• – indexOfObject:inSortedRange:options:usingComparator:

Sending Messages to Elements

• – makeObjectsPerformSelector:
• – makeObjectsPerformSelector:withObject:
• – enumerateObjectsUsingBlock:
• – enumerateObjectsWithOptions:usingBlock:
• – enumerateObjectsAtIndexes:options:usingBlock:

Comparing Arrays

• – firstObjectCommonWithArray:
• – isEqualToArray:

Deriving New Arrays    

• – arrayByAddingObject:   --追加数组的内容
• – arrayByAddingObjectsFromArray:
• – filteredArrayUsingPredicate:
• – subarrayWithRange:

Sorting

• – sortedArrayHint
• – sortedArrayUsingFunction:context:
• – sortedArrayUsingFunction:context:hint:
• – sortedArrayUsingDescriptors:
• – sortedArrayUsingSelector:
• – sortedArrayUsingComparator:
• – sortedArrayWithOptions:usingComparator:

Working with String Elements

• – componentsJoinedByString:   --   数组-->字符串

Creating a Description

• – description
• – descriptionWithLocale:
• – descriptionWithLocale:indent:
• – writeToFile:atomically:
• – writeToURL:atomically:

Collecting Paths

• – pathsMatchingExtensions:

Key-Value Observing

• – addObserver:forKeyPath:options:context:
• – removeObserver:forKeyPath:
• – removeObserver:forKeyPath:context:
• – removeObserver:fromObjectsAtIndexes:forKeyPath:context:
• – addObserver:toObjectsAtIndexes:forKeyPath:options:context:
• – removeObserver:fromObjectsAtIndexes:forKeyPath:

Key-Value Coding

• – setValue:forKey:
• – valueForKey:

NSMutableArray

Tasks

Creating and Initializing a Mutable Array

• + arrayWithCapacity:
• – initWithCapacity:
• – init

Adding Objects

• – addObject:
• – addObjectsFromArray:
• – insertObject:atIndex:
• – insertObjects:atIndexes:

Removing Objects

• – removeAllObjects
• – removeLastObject
• – removeObject:
• – removeObject:inRange:
• – removeObjectAtIndex:
• – removeObjectsAtIndexes:
• – removeObjectIdenticalTo:
• – removeObjectIdenticalTo:inRange:
• – removeObjectsInArray:
• – removeObjectsInRange:
• – removeObjectsFromIndices:numIndices: Deprecated in OS X v10.6

Replacing Objects

• – replaceObjectAtIndex:withObject:
• – setObject:atIndexedSubscript:
• – replaceObjectsAtIndexes:withObjects:
• – replaceObjectsInRange:withObjectsFromArray:range:
• – replaceObjectsInRange:withObjectsFromArray:
• – setArray:

Filtering Content

• – filterUsingPredicate:

Rearranging Content

• – exchangeObjectAtIndex:withObjectAtIndex:
• – sortUsingDescriptors:
• – sortUsingComparator:
• – sortWithOptions:usingComparator:
• – sortUsingFunction:context:
• – sortUsingSelector:

Class Methods