////  main.m//  NSArray的排序////  Created by ganchaobo on 13-4-28.//  Copyright (c) 2013年 ganchaobo. All rights reserved.//#import 
     
      #import "Student.h"#import "MyStudent.h"void SimpleNSArraySort(){    NSArray *arr=[NSArray arrayWithObjects:@"3",@"1",@"2", nil];    //NSArray中每个对象比较的时候，都是调用对象的compare进行比较    //用制定方法比较 NSArray  *sortArray=   [arr sortedArrayUsingSelector:@selector(compare:)];    NSLog(@"%@",arr);    NSLog(@"======");    NSLog(@"%@",sortArray);        }void ModelNArraySort(){    //数组里面要比较的对象，必须有一个方法返回compareRestult    Student *s1=[Student StudentWithName:@"wen" AndLastName:@"li"];    Student *s2=[Student StudentWithName:@"xen" AndLastName:@"Li"];    Student *s3=[Student StudentWithName:@"xen" AndLastName:@"z"];    NSArray *arr=[NSArray arrayWithObjects:s1,s2,s3, nil];    NSArray *sortArry=[arr sortedArrayUsingSelector:@selector(CompareStudent:)];//每个对象的比较方法    NSLog(@"%@" ,sortArry);    }void BlockNSArraySort(){    Student *s1=[Student StudentWithName:@"wen" AndLastName:@"li"];    Student *s2=[Student StudentWithName:@"xen" AndLastName:@"Li"];    Student *s3=[Student StudentWithName:@"xen" AndLastName:@"z"];    NSArray *arr=[NSArray arrayWithObjects:s1,s2,s3, nil];    //NSArray *sortArry=[arr sortedArrayUsingSelector:@selector(CompareStudent:)];//每个对象的比较方法    //用block <#^NSComparisonResult(id obj1, id obj2)cmptr#>    NSArray *sortArry=[arr sortedArrayUsingComparator:^NSComparisonResult(Student *stu1 ,Student *stu2){        NSComparisonResult result=[stu1.LastName compare:stu2.LastName options:NSCaseInsensitiveSearch];        if(NSOrderedSame==result){            result=[stu1.Name compare:stu2.Name options:NSCaseInsensitiveSearch];        }        return result;    }];    NSLog(@"%@" ,sortArry);}void MoreModelNSArraySort(){    Student *s1=[Student StudentWithName:@"wen" AndLastName:@"li" AndBookName:@"Book1"];    Student *s2=[Student StudentWithName:@"xen" AndLastName:@"Li" AndBookName:@"Book1"];    Student *s3=[Student StudentWithName:@"xen" AndLastName:@"B" AndBookName:@"Book2"];     NSArray *arr=[NSArray arrayWithObjects:s1,s2,s3, nil];    NSSortDescriptor *BookDescript=[NSSortDescriptor sortDescriptorWithKey:@"bk.BookName" ascending:YES];    NSSortDescriptor *LastNameDescript=[NSSortDescriptor sortDescriptorWithKey:@"LastName" ascending:YES];    NSSortDescriptor *NameDescirpt=[NSSortDescriptor sortDescriptorWithKey:@"Name" ascending:YES];    NSArray *arr1=[NSArray arrayWithObjects:BookDescript,LastNameDescript,NameDescirpt, nil];    NSArray *sortArry=[arr sortedArrayUsingDescriptors:arr1];//调用对象的copare方法，没有指定block    NSLog(@"%@",sortArry);    }int main(int argc, const char * argv[]){    @autoreleasepool {                //MoreModelNSArraySort();        MyStudent *mm=[MyStudent StudentWithName:@"aa" AndLastName:@"bb" AndBookName:@"cc" AndAge:12];        NSLog(@"%@",mm);            }    return 0;}