• Object-C-Foundation-数组排序


    系统类型排序;

    NSArray *goodsNames =@[@"computer",@"iphone",@"ipad"];

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

    自定义排序

    Person *p1=[[Person alloc]initWithName:@"tom" andAge:12 andCard:nil];

    Person *p2=[[Person alloc]initWithName:@"jack" andAge:23 andCard:nil];

    Person *p1=[[Person alloc]initWithName:@"maggie" andAge:11 andCard:nil];

     NSArry *personsArray=@[p1,p2,p3];

    在person类中定义一个comparePerson方法

    /***************************************************************

    -(NSComparisonResult)comparePerson:(Person *)person

    {

        NSNumber *age1=[[NSNumber alloc]initWithInt:self.age];

        NSnumber *age2=[[NSNumber alloc]initWithInt:person.age];

        NSComparisonResult result=[age1 compare:age2];

      if(result == NSOrderedSame)

        {

             result=[self.name compare:person.name];

        }

        return result;

    }

    /******************************************************************

    NSArray *personsArray=@[p1,p2,p3];

    NSArray *sortedArray=[personsArray sortedArrayUsingSelector:@selector(comparePerson:)];

    完成对personsArray进行排序

    使用block进行排序

    NSArray *sortedArray=[personsArray sortedArrayUsingComparator:^NSComparisonResult(id obj1,id obj2){

         Person *p1=(Person *)obj1;

         Person *p2=(Person *)obj2;

         NSNumber *age1=[[NSNumber alloc]initWithInt:self.age];

        NSnumber *age2=[[NSNumber alloc]initWithInt:person.age];

        NSComparisonResult result=[age1 compare:age2];

      if(result == NSOrderedSame)

        {

             result=[self.name compare:person.name];

        }

        return result;

    }

    复杂排序

    NSSortDescriptor

    NSSortDescriptor *sort1=[[NSSortDescriptor]initWithKey:@"name" ascending:YES];

    NSSortDescriptor *sort2=[[NSSortDescriptor]initWithKey:@"age" ascending:YES];

    NSArray *conditionsArray=@[sort1,sort2];

    NSArray *sortedArray =[personsArray sortedArrayUsingDescriptors:conditionsArray];

    /*******************

    NSSortDescriptor *sort1=[[NSSortDescriptor]initWithKey:@"name" ascending:YES];

    NSSortDescriptor *sort2=[[NSSortDescriptor]initWithKey:@"self.card.balance" ascending:YES];

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  • 原文地址:https://www.cnblogs.com/Opaser/p/4555066.html
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