iOS의 풀 수 있는 배열 NSMutable Array

1     // 
2     NSMutableArray *array1 = [[NSMutableArray alloc] init];
3     // 
4     NSMutableArray *array2 = [NSMutableArray arrayWithCapacity:0];

1     NSMutableArray *array = [[NSMutableArray alloc] init];
2     NSArray *tmp = [NSArray arrayWithObjects:@"jing", @"dian", @"ying", @"xue", @"yuan", nil];
3     [array addObject:@"bei"];
4     [array addObjectsFromArray:tmp];
5     //- (void)insertObject:(id)anObject atIndex:(NSUInteger)index;
6     // ： 
7     [array insertObject:@"hao" atIndex:1];
8     NSLog(@"%@", array);

NSMutableArray *array = [NSMutableArray arrayWithObjects:@"nan", @"jing", @"hao", nil];
#if 0
  //- (void)removeObjectAtIndex:(NSUInteger)index;
 // ： 
  [array removeObjectAtIndex:2];
#endif
#if 0
  //- (void)removeObject:(id)anObject;
 // ： ( )
  [array removeObject:@"hao"];
#endif
#if 0
  //- (void)removeObjectsInRange:(NSRange)range;
 // ： ， 
  [array removeObjectsInRange:{1, 2}];
#endif
  //- (void)removeAllObjects;
 // ： 
  [array removeAllObjects];
  NSLog(@"%@", array);

1     NSMutableArray *array = [NSMutableArray arrayWithObjects:@"nan", @"jing", @"hao", nil];
2     //- (void)replaceObjectAtIndex:(NSUInteger)index withObject:(id)anObject;
3     // ： 
4     [array replaceObjectAtIndex:0 withObject:@"bei"];

NSMutableArray *array = [NSMutableArray arrayWithObjects:@"nan", @"jing", @"hao", nil];
    //- (void)exchangeObjectAtIndex:(NSUInteger)idx1 withObjectAtIndex:(NSUInteger)idx2;
    // ： 
    [array exchangeObjectAtIndex:0 withObjectAtIndex:2];