你的Person对象需要实现一个方法，比如compare:它接受另一个Person对象，并根据两个对象之间的关系返回NSComparisonResult。

然后你会调用sortedArrayUsingSelector: with @selector(compare:)，这应该就完成了。

还有其他方法，但据我所知，还没有类似可比性接口的cocoa。使用sortedArrayUsingSelector:可能是最简单的方法。

NSSortDescriptor *sortDescriptor;
sortDescriptor = [[[NSSortDescriptor alloc] initWithKey:@"birthDate" ascending:YES] autorelease];
NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
NSArray *sortedArray;
sortedArray = [drinkDetails sortedArrayUsingDescriptors:sortDescriptors];

谢谢，运行正常…

使用NSSortDescriptor对自定义对象的NSMutableArray进行排序

 NSSortDescriptor *sortingDescriptor;
 sortingDescriptor = [[NSSortDescriptor alloc] initWithKey:@"birthDate"
                                       ascending:YES];
 NSArray *sortArray = [drinkDetails sortedArrayUsingDescriptors:@[sortDescriptor]];

我只是根据自定义需求做了多级排序。

//对值排序

    [arrItem sortUsingComparator:^NSComparisonResult (id a, id b){

    ItemDetail * itemA = (ItemDetail*)a;
    ItemDetail* itemB =(ItemDetail*)b;

    //item price are same
    if (itemA.m_price.m_selling== itemB.m_price.m_selling) {

        NSComparisonResult result=  [itemA.m_itemName compare:itemB.m_itemName];

        //if item names are same, then monogramminginfo has to come before the non monograme item
        if (result==NSOrderedSame) {

            if (itemA.m_monogrammingInfo) {
                return NSOrderedAscending;
            }else{
                return NSOrderedDescending;
            }
        }
        return result;
    }

    //asscending order
    return itemA.m_price.m_selling > itemB.m_price.m_selling;
}];

https://sites.google.com/site/greateindiaclub/mobil-apps/ios/multilevelsortinginiosobjectivec

我在我的一些项目中使用了sortUsingFunction::::

int SortPlays(id a, id b, void* context)
{
    Play* p1 = a;
    Play* p2 = b;
    if (p1.score<p2.score) 
        return NSOrderedDescending;
    else if (p1.score>p2.score) 
        return NSOrderedAscending;
    return NSOrderedSame;
}

...
[validPlays sortUsingFunction:SortPlays context:nil];

Swift的协议和函数式编程让这变得非常简单，你只需要让你的类符合Comparable协议，实现协议所需的方法，然后使用sorted(by:)高阶函数来创建一个排序的数组，而不需要使用可变数组。

class Person: Comparable {
    var birthDate: NSDate?
    let name: String

    init(name: String) {
        self.name = name
    }

    static func ==(lhs: Person, rhs: Person) -> Bool {
        return lhs.birthDate === rhs.birthDate || lhs.birthDate?.compare(rhs.birthDate as! Date) == .orderedSame
    }

    static func <(lhs: Person, rhs: Person) -> Bool {
        return lhs.birthDate?.compare(rhs.birthDate as! Date) == .orderedAscending
    }

    static func >(lhs: Person, rhs: Person) -> Bool {
        return lhs.birthDate?.compare(rhs.birthDate as! Date) == .orderedDescending
    }

}

let p1 = Person(name: "Sasha")
p1.birthDate = NSDate() 

let p2 = Person(name: "James")
p2.birthDate = NSDate()//he is older by miliseconds

if p1 == p2 {
    print("they are the same") //they are not
}

let persons = [p1, p2]

//sort the array based on who is older
let sortedPersons = persons.sorted(by: {$0 > $1})

//print sasha which is p1
print(persons.first?.name)
//print James which is the "older"
print(sortedPersons.first?.name)