NSMutableArray *array = [NSMutableArray array];
[array addObjectsFromArray:@[@"北",@"上",@"广",@"深"]];
NSIndexSet *indexSet = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(2, 3)];
[array insertObjects:@[@"00",@"11",@"22"] atIndexes:indexSet];
DLog(@"1 == %@",array);
[array removeObjectsInArray:@[@"00",@"11",@"22"]];
DLog(@"2 == %@",array);
[array insertObjects:@[@"44",@"55",@"66"] atIndexes:indexSet];
DLog(@"3 == %@",array);