1. -(NSComparisonResult)compareStuden:(Student *)stu{
   
2.     //将非OC对象包装成OC对象
   
3.     NSNumber *score1 =[NSNumber numberWithInt:self.score];
   
4.     NSNumber *score2 =[NSNumber numberWithInt:stu.score];
   
5.     NSNumber *age1 = [NSNumber numberWithInt:self.age];
   
6.     NSNumber *age2 = [NSNumber numberWithInt:stu.age];
   
7.    
   
8.     NSComparisonResult result= [score1 compare: score2];
   
9.     if (result==NSOrderedSame) {
   
10.         result = [age1 compare: age2];
    
11.         if (result== NSOrderedSame) {
    
12.             result =  [self.name compare:stu.name];
    
13.         }
    
14.     } return result;
    
15. }
    
16. 
    
17. -(NSString *)description{
    
18.    // NSLog(@"My Name is @%,my age is i%,my score is i%",_name,_age,_score);
    
19.    NSString *str= [NSString
    
20. stringWithFormat:@"My Name is %@ ,my age is %i ,my score is %i" ,self.name, self.age, self.score];
    
21.     return  str;
    
22. }
    
23. -(void)dealloc{
    
24.     [_name release];
    
25.     NSLog(@"姓名为%@的学生被回收了。。。。",_name);
    
26.     [super dealloc];
    
27.    
    
28. }

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1. int main(int argc, const char * argv[]) {
   
2.     @autoreleasepool {
   
3.         // insert code here...
   
4.         Student* stu1= [[Student alloc]initName:@"JJ" andAge:22 andScore:100];
   
5.         Student* stu2= [[Student alloc]initName:@"YY" andAge:20 andScore:90];
   
6.         Student* stu3= [[Student alloc]initName:@"ff" andAge:20 andScore:90 ];
   
7.         Student* stu4= [[Student alloc]initName:@"dd" andAge:24 andScore:77];
   
8.         Student* stu5= [[Student alloc]initName:@"bb" andAge:20 andScore:95];
   
9.         
   
10.         Student *stu6= [Student studentName:@"anzi" withAge:22 withScore:100 ];
    
11.         
    
12.         stu1.name = @"xiaojunquan";
    
13.         NSArray *array = [NSArray arrayWithObjects:stu1,stu2,stu3,stu4,stu5,stu6, nil];
    
14.         NSArray *array2 =[array sortedArrayUsingSelector:@selector(compareStuden:)];
    
15.         NSLog(@"array2:学生对象按照成绩—》年龄—》姓名优先级排序:%@",array2);
    
16.         
    
17.           NSLog(@" 以下为高级方法排序：");
    
18.         sortStudent(array);
    
19.         
    
20.         [stu5 release];
    
21.         [stu4 release];
    
22.         [stu3 release];
    
23.         [stu2 release];
    
24.         [stu1 release];
    
25.       
    
26.     }
    
27.     return 0;
    
28. }
    

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很不错~~~