在Objective-C中使用指针数组的最佳方法是什么？

NSArray *array = @[@1, @2, @3];

id object = array[0];

NSMutableArray *mutableArray = [NSMutableArray arrayWithArray:array];
[mutableArray addObject:@4];

[mutableArray removeObjectAtIndex:0];

NSArray *sortedArray = [array sortedArrayUsingSelector:@selector(compare:)];

for (id object in array) {
    NSLog(@"%@", object);
}