OC班级类

//

//  MyClass.h

//  OC2_班级类

//

//  Created by zhangxueming on 15/6/12.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import <Foundation/Foundation.h>

#import "Student.h"



@interface MyClass : NSObject

{

    NSString * _className;

    NSMutableArray * _stuList;

}



- (id)initWithClassName:(NSString *)name;

- (void)setClassName:(NSString *)name;

- (NSString*)className;

- (void)addStudent:(Student *)student;

- (void)addStudent:(Student *)student atIndex:(NSInteger) index;

- (void)removeStudent:(Student *)student;

- (void)removeStudentAtIndex:(NSInteger) index;

- (void)replaceStudent:(Student *)student atIndex:(NSInteger) index;

- (void)showStuList;

- (void)sortedByNumber;//按照学号升序

- (void)sortedByScore;//按照分数降序

- (void)sortedByName;//按照名字降序





+ (void)testMyClass;



@end

//

//  MyClass.m

//  OC2_班级类

//

//  Created by zhangxueming on 15/6/12.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import "MyClass.h"



@implementation MyClass



- (id)initWithClassName:(NSString *)name

{

    if (self = [super init]) {

        _className = name;

        _stuList = [NSMutableArray array];

    }

    return self;

}

- (void)setClassName:(NSString *)name

{

    _className = name;

}



- (NSString*)className

{

    return _className;

}



- (void)addStudent:(Student *)student

{

    if (![_stuList containsObject:student]) {

        [_stuList addObject:student];

    }

}



- (void)addStudent:(Student *)student atIndex:(NSInteger) index

{

    [_stuList insertObject:student atIndex:index];

}



- (void)removeStudent:(Student *)student

{

    [_stuList removeObject:student];

}



- (void)removeStudentAtIndex:(NSInteger) index

{

    [_stuList removeObjectAtIndex:index];

}



- (void)replaceStudent:(Student *)student atIndex:(NSInteger) index

{

    [_stuList replaceObjectAtIndex:index withObject:student];

}



//遍历学生数组

- (void)showStuList

{

    for (Student *stu in _stuList) {

        [stu printStudent];

    }

}



- (void)sortedByNumber//按照学号升序

{

    [_stuList sortUsingSelector:@selector(isSortByNum:)];

}

- (void)sortedByScore//按照分数降序

{

    [_stuList sortUsingSelector:@selector(isSortByScore:)];

}

- (void)sortedByName//按照名字降序

{

    [_stuList sortUsingSelector:@selector(isSortByName:)];

}



+ (void)testMyClass

{

    MyClass *ios1509 = [[MyClass alloc] initWithClassName:@"ios1509"];

    for  (NSInteger i=0; i<10; i++) {

        Student *stu = [[Student alloc] initWithName:[NSString stringWithFormat:@"name%d", arc4random()%50+1] number:arc4random()%100+1 score:arc4random()%101];

        [ios1509 addStudent:stu];

    }

    NSLog(@"排序前");

    [ios1509 showStuList];

    

    NSLog(@"分数排序后");

    [ios1509 sortedByScore];

    [ios1509 showStuList];

    

    NSLog(@"学号排序后");

    [ios1509 sortedByNumber];

    [ios1509 showStuList];

    

    NSLog(@"名字排序后");

    [ios1509 sortedByName];

    [ios1509 showStuList];

}



@end

//

//  Student.h

//  OC2_班级类

//

//  Created by zhangxueming on 15/6/12.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import <Foundation/Foundation.h>



@interface Student : NSObject

{

    NSString * _name;

    NSInteger _num;

    NSInteger _score;

}



- (id)initWithName:(NSString *)name number:(NSInteger)num score:(NSInteger)score;

- (void)setName:(NSString *)name;

- (NSString *)name;

- (void)setNum:(NSInteger)num;

- (NSInteger)num;

- (void)setScore:(NSInteger)score;

- (NSInteger)score;



- (BOOL)isSortByScore:(Student *)aStudent;

- (BOOL)isSortByNum:(Student *)aStudent;

- (NSComparisonResult)isSortByName:(Student *)aStudent;



- (void)printStudent;



@end

//

//  Student.m

//  OC2_班级类

//

//  Created by zhangxueming on 15/6/12.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import "Student.h"



@implementation Student



- (id)initWithName:(NSString *)name number:(NSInteger)num score:(NSInteger)score

{

    if(self = [super init])

    {

        _name = name;

        _num = num;

        _score = score;

    }

    return self;

}

- (void)setName:(NSString *)name

{

    _name = name;

}



- (NSString *)name

{

    return _name;

}



- (void)setNum:(NSInteger)num

{

    _num = num;

}



- (NSInteger)num

{

    return _num;

}



- (void)setScore:(NSInteger)score

{

    _score = score;

}



- (NSInteger)score

{

    return _score;

}



- (BOOL)isSortByScore:(Student *)aStudent

{

    if ([self score]>[aStudent score]) {

        return YES;

    }

    return NO;

}



- (BOOL)isSortByNum:(Student *)aStudent

{

    if ([self num] > [aStudent num]) {

        return YES;

    }

    return NO;

}



- (NSComparisonResult)isSortByName:(Student *)aStudent

{

    return [[self name] compare:[aStudent name]];

}



- (void)printStudent

{

    NSLog(@"name = %@ num = %li score = %li", [self name], [self num], [self score]);

}



@end

//

//  main.m

//  OC2_班级类

//

//  Created by zhangxueming on 15/6/12.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import <Foundation/Foundation.h>

#import "MyClass.h"



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

    @autoreleasepool {

        // insert code here...

        //NSLog(@"Hello, World!");

        [MyClass testMyClass];

    }

    return 0;

}