数组排序

 

 

#import <Foundation/Foundation.h>

 

int main(int argc, const char * argv[]) {

    @autoreleasepool {

        NSArray *arr=@[@{@"name":@"Tim Cook",@"age":@"24",@"sex":@"female",@"score":@"89"},@{@"name":@"Jony Ive",@"age":@"26",@"sex":@"female",@"score":@"76"},@{@"name":@"Steve Jobs",@"age":@"24",@"sex":@"male",@"score":@"67"},@{@"name":@"Robert Brunne",@"age":@"28",@"sex":@"male",@"score":@"88"}];

        

        /*

         1.添加数据姓名:Philip Schiller年龄:29性别:female分数:70到arr数组内。

         */

        NSMutableArray *newarr= [[NSMutableArray alloc]initWithArray:arr];

        NSDictionary *arr1=@{@"name":@"Philip Schiller",@"age":@"29",@"sex":@"female",@"score":@"70"};

        [newarr addObject:arr1];

        

        /* 2.查找数组内"Steve Jobs"的数据并删除。*/

        

        for (int i=0; i<[newarr count]; i++) {

            NSDictionary *dic=newarr[i];

 

            if ([dic[@"name"]isEqual:@"Steve Jobs"]) {

                [newarr removeObject: dic];

            }

        }

 

        /*3.按姓名首字母进行排序。*/

        NSSortDescriptor *des=[NSSortDescriptor sortDescriptorWithKey:@"name" ascending:1];

        NSArray *arr2 =[newarr sortedArrayUsingDescriptors:[NSArray arrayWithObjects:des, nil]];

        for (NSDictionary *dic in arr2) {

        

            NSLog(@"%@ %@ %@ %@",dic[@"name"],dic[@"age"],dic[@"sex"],dic[@"score"]);

            

        }

        

        

         /*4.按年龄进行升序排序,如果年龄相同则按性别进行排序。*/

        NSSortDescriptor *des1=[NSSortDescriptor sortDescriptorWithKey:@"age" ascending:1];

        NSSortDescriptor *des4=[NSSortDescriptor sortDescriptorWithKey:@"sex" ascending:1];

        

        NSArray *arr3 =[newarr sortedArrayUsingDescriptors:[NSArray arrayWithObjects:des1,des4, nil]];

        for (NSDictionary *dic1 in arr3) {

           

            NSLog(@"%@ %@ %@ %@",dic1[@"name"],dic1[@"age"],dic1[@"sex"],dic1[@"score"]);

            

            

            

            

        }

   

        

         /*5.输出成绩大于或等于80分的学员信息。*/

        for (NSDictionary *dic3 in arr2) {

            int num=[dic3[@"score"] intValue];

            if (num>=80) {

                NSLog(@"%@ %@ %@ %@",dic3[@"name"],dic3[@"age"],dic3[@"sex"],dic3[@"score"]);

 

            }

            

        }

 

    }

    return 0;

}