NSMapTable、NSHashTable与NSPointerArray的封装

说明

NSMapTable对应NSDictionary；NSHashTable对应NSSet；NSPointerArray对应NSArray，本人通过装饰设计模式对他们的使用进行了封装。

源码

https://github.com/YouXianMing/WeakList

//
//  WeakDictionary.h
//  IteratorPattern
//
//  Created by YouXianMing on 15/9/12.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//#import <Foundation/Foundation.h>@interface WeakDictionary : NSObject/***  元素个数*/
@property (readonly) NSUInteger count;/***  获取对象**  @param aKey**  @return 对象*/
- (id)objectForKey:(id)aKey;/***  根据键值移除对象**  @param aKey 键值*/
- (void)removeObjectForKey:(id)aKey;/***  添加对象**  @param anObject 对象*  @param aKey     键值*/
- (void)setObject:(id)anObject forKey:(id)aKey;/***  键值枚举器**  @return 枚举器*/
- (NSEnumerator *)keyEnumerator;/***  对象枚举器**  @return 对象枚举器*/
- (NSEnumerator *)objectEnumerator;/***  移除所有对象*/
- (void)removeAllObjects;/***  返回字典**  @return 字典*/
- (NSDictionary *)dictionaryRepresentation;@end

//
//  WeakDictionary.m
//  IteratorPattern
//
//  Created by YouXianMing on 15/9/12.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//#import "WeakDictionary.h"@interface WeakDictionary () {NSMapTable  *_mapTable;
}@end@implementation WeakDictionary- (instancetype)init {self = [super init];if (self) {_mapTable = [NSMapTable strongToWeakObjectsMapTable];}return self;
}- (id)objectForKey:(id)aKey {return [_mapTable objectForKey:aKey];
}- (void)removeObjectForKey:(id)aKey {[_mapTable removeObjectForKey:aKey];
}- (void)setObject:(id)anObject forKey:(id)aKey {[_mapTable setObject:anObject forKey:aKey];
}- (NSEnumerator *)keyEnumerator {return [_mapTable keyEnumerator];
}- (NSEnumerator *)objectEnumerator {return [_mapTable objectEnumerator];
}- (void)removeAllObjects {[_mapTable removeAllObjects];
}- (NSDictionary *)dictionaryRepresentation {return [_mapTable dictionaryRepresentation];
}@synthesize count = _count;
- (NSUInteger)count {return _mapTable.count;
}- (NSString *)description {return [NSString stringWithFormat:@"%@", _mapTable.dictionaryRepresentation];
}@end

//
//  WeakSet.h
//  IteratorPattern
//
//  Created by YouXianMing on 15/9/12.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//#import <Foundation/Foundation.h>@interface WeakSet : NSObject/***  元素个数*/
@property (readonly)            NSUInteger  count;/***  所有对象*/
@property (readonly, copy)      NSArray    *allObjects;/***  获取一个对象*/
@property (readonly, nonatomic) id          anyObject;/***  获取集合*/
@property (readonly, copy)      NSSet      *setRepresentation;- (id)member:(id)object;
- (NSEnumerator *)objectEnumerator;
- (void)addObject:(id)object;
- (void)removeObject:(id)object;
- (void)removeAllObjects;
- (BOOL)containsObject:(id)anObject;@end

//
//  WeakSet.m
//  IteratorPattern
//
//  Created by YouXianMing on 15/9/12.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//#import "WeakSet.h"@interface WeakSet () {NSHashTable  *_hashTable;
}@end@implementation WeakSet- (instancetype)init {self = [super init];if (self) {_hashTable = [NSHashTable weakObjectsHashTable];}return self;
}- (id)member:(id)object {return [_hashTable member:object];
}- (NSEnumerator *)objectEnumerator {return [_hashTable objectEnumerator];
}- (void)addObject:(id)object {[_hashTable addObject:object];
}- (void)removeObject:(id)object {[_hashTable removeObject:object];
}- (void)removeAllObjects {[_hashTable removeAllObjects];
}- (BOOL)containsObject:(id)anObject {return [_hashTable containsObject:anObject];
}@synthesize count = _count;
- (NSUInteger)count {return _hashTable.count;
}@synthesize allObjects = _allObjects;
- (NSArray *)allObjects {return [_hashTable allObjects];
}@synthesize anyObject = _anyObject;
- (id)anyObject {return [_hashTable anyObject];
}@synthesize setRepresentation = _setRepresentation;
- (NSSet *)setRepresentation {return [_hashTable setRepresentation];
}- (NSString *)description {return [NSString stringWithFormat:@"%@", _hashTable.allObjects];
}@end

//
//  WeakArray.h
//  IteratorPattern
//
//  Created by YouXianMing on 15/9/12.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//#import <Foundation/Foundation.h>@interface WeakArray : NSObject@property (readonly, copy) NSArray    *allObjects;
@property (readonly)       NSUInteger  count;- (id)objectAtIndex:(NSUInteger)index;
- (void)addObject:(id)object;
- (void)removeObjectAtIndex:(NSUInteger)index;
- (void)insertObject:(id)object atIndex:(NSUInteger)index;
- (void)replaceObjectAtIndex:(NSUInteger)index withPointer:(id)object;
- (void)compact;@end

//
//  WeakArray.m
//  IteratorPattern
//
//  Created by YouXianMing on 15/9/12.
//  Copyright (c) 2015年 YouXianMing. All rights reserved.
//#import "WeakArray.h"@interface WeakArray () {NSPointerArray *_pointerArray;
}@end@implementation WeakArray- (instancetype)init {self = [super init];if (self) {_pointerArray = [NSPointerArray pointerArrayWithOptions:NSPointerFunctionsWeakMemory];}return self;
}- (id)objectAtIndex:(NSUInteger)index {return [_pointerArray pointerAtIndex:index];
}- (void)addObject:(id)object {[_pointerArray addPointer:(__bridge void *)(object)];
}- (void)removeObjectAtIndex:(NSUInteger)index {[_pointerArray removePointerAtIndex:index];
}- (void)insertObject:(id)object atIndex:(NSUInteger)index {[_pointerArray insertPointer:(__bridge void *)(object) atIndex:index];
}- (void)replaceObjectAtIndex:(NSUInteger)index withPointer:(id)object {[_pointerArray replacePointerAtIndex:index withPointer:(__bridge void *)(object)];
}- (void)compact {[_pointerArray compact];
}@synthesize count = _count;
- (NSUInteger)count {return _pointerArray.count;
}- (NSString *)description {return [NSString stringWithFormat:@"%@", _pointerArray.allObjects];
}@synthesize allObjects = _allObjects;
- (NSArray *)allObjects {return _pointerArray.allObjects;
}@end

使用