NSMutableArray 进阶

最新推荐文章于 2025-07-22 16:38:35 发布

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#interface #deprecated #object #测试

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本文详细介绍了NSMutableArray的基础用法及一些实用方法，包括如何添加、插入、替换、删除元素等，并提供了一个具体的Category实例，展示了如何将指定对象移动到数组首位。

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对于这种基础类型的东西其实没啥好多讲的，自己跳到头文件看看基本就知道怎么用了。几个有点疑问的地方我测试了一下加上了注释。

/****************	MutableArray		****************/

@interface NSMutableArray : NSArray

- (void)addObject:(id)anObject;//LW:add object at the last of the array.
- (void)insertObject:(id)anObject atIndex:(NSUInteger)index;
- (void)removeLastObject;
- (void)removeObjectAtIndex:(NSUInteger)index;
- (void)replaceObjectAtIndex:(NSUInteger)index withObject:(id)anObject;

@end

@interface NSMutableArray (NSExtendedMutableArray)
    
- (void)addObjectsFromArray:(NSArray *)otherArray;//LW:add otherArray at the end ,the order will not change
- (void)exchangeObjectAtIndex:(NSUInteger)idx1 withObjectAtIndex:(NSUInteger)idx2;
- (void)removeAllObjects;
- (void)removeObject:(id)anObject inRange:(NSRange)range;
- (void)removeObject:(id)anObject;
- (void)removeObjectIdenticalTo:(id)anObject inRange:(NSRange)range;
- (void)removeObjectIdenticalTo:(id)anObject;
- (void)removeObjectsFromIndices:(NSUInteger *)indices numIndices:(NSUInteger)cnt NS_DEPRECATED(10_0, 10_6, 2_0, 4_0);
- (void)removeObjectsInArray:(NSArray *)otherArray;
- (void)removeObjectsInRange:(NSRange)range;
- (void)replaceObjectsInRange:(NSRange)range withObjectsFromArray:(NSArray *)otherArray range:(NSRange)otherRange;
- (void)replaceObjectsInRange:(NSRange)range withObjectsFromArray:(NSArray *)otherArray;
- (void)setArray:(NSArray *)otherArray;
- (void)sortUsingFunction:(NSInteger (*)(id, id, void *))compare context:(void *)context;
- (void)sortUsingSelector:(SEL)comparator;

- (void)insertObjects:(NSArray *)objects atIndexes:(NSIndexSet *)indexes;
- (void)removeObjectsAtIndexes:(NSIndexSet *)indexes;
- (void)replaceObjectsAtIndexes:(NSIndexSet *)indexes withObjects:(NSArray *)objects;

#if NS_BLOCKS_AVAILABLE
- (void)sortUsingComparator:(NSComparator)cmptr NS_AVAILABLE(10_6, 4_0);
- (void)sortWithOptions:(NSSortOptions)opts usingComparator:(NSComparator)cmptr NS_AVAILABLE(10_6, 4_0);
#endif

@end

@interface NSMutableArray (NSMutableArrayCreation)

+ (id)arrayWithCapacity:(NSUInteger)numItems;
- (id)initWithCapacity:(NSUInteger)numItems;

@end

最近项目有个需求，要把一个Array里面的某一个Object移到这个Array的第一个位置，于是写了个Category方法，贴在下面：

// NSMutableArray+LWUtils.h

#import <Foundation/Foundation.h>

@interface NSMutableArray (LWUtils)
- (void)moveObjectToFirstAtIndex:(NSUInteger)index;
- (void)moveObjectAtIndex:(NSUInteger)idx1 toIndex:(NSUInteger)idx2;
@end

// NSMutableArray+LWUtils.m

#import "NSMutableArray+LWUtils.h"

@implementation NSMutableArray (LWUtils)
- (void)moveObjectToFirstAtIndex:(NSUInteger)index
{
    [self moveObjectAtIndex:index toIndex:0];
}

- (void)moveObjectAtIndex:(NSUInteger)idx1 toIndex:(NSUInteger)idx2
{
    id object = [self objectAtIndex:idx1];
    [self removeObjectAtIndex:idx1];
    [self insertObject:object atIndex:idx2];
}
@end