2013-8-5学习练习 协议

1浅拷贝和深拷贝的区别和相同点；

浅拷贝就比如像引用类型，而深拷贝就比如值类型。
浅拷贝是指源对象与拷贝对象共用一份实体，仅仅是引用的变量不同（名称不同）。对其中任何一个对象的改动都会影响另外一个对象。
深拷贝是指源对象与拷贝对象互相独立，其中任何一个对象的改动都不会对另外一个对象造成影响。

2用什么方法可以生成一个完全相同的可变数组(1)给你一个不可变数组（2）给你一个可变对象；

NSMultableArray+test.h:

#import <Foundation/Foundation.h>
@interface NSMutableArray (test)
+(id)copyWithMutableArray:(NSMutableArray *)mulArr;
+(id)copywithArray:(NSArray *)Arr;
@end

NSMultableArray+test.m:

#import "NSMultableArray+test.h"
@implementation NSMutableArray (test)
+(id)copyWithMutableArray:(NSMutableArray *)mulArr
{
    NSMutableArray *mulArray = [NSMutableArray arrayWithArray:[mulArr copy]];
    return mulArray;
}
+(id)copywithArray:(NSArray *)Arr
{
    NSArray *Array = [NSArray arrayWithArray:[Arr copy]];
    return Array;
}
@end

main:

#import <Foundation/Foundation.h>
#import "NSMultableArray+test.h"
int main(int argc, const char * argv[])
{
    @autoreleasepool {
        NSMutableArray *mutableArray = [[[NSMutableArray alloc] init] autorelease];
        NSMutableArray *mularr = [[NSMutableArray alloc] initWithObjects:@"1",@"2",@"3",nil];
        mutableArray = [NSMutableArray copyWithMutableArray:mularr];
        NSLog(@"%@",mutableArray);
        NSArray *array = [[NSArray alloc] initWithObjects:@"4",@"5",@"6",nil];
        mutableArray = [NSMutableArray copywithArray:array];
        NSLog(@"%@",mutableArray);
    }
    return 0;
}

结果：

2013-08-05 20:35:41.152 作业2[3062:303] (

    1,

    2,

    3

)

2013-08-05 20:35:41.154 作业2[3062:303] (

    4,

    5,

    6

)

3老师发试卷，学生做题目，做完题目报告，老师收试卷（用协议委托写这个过程）；

protocolText.h:

#import <Foundation/Foundation.h>
@protocol protocolText <NSObject>
@optional
-(void)Excise;//做题目
-(void)ReceivePager;//收试卷
@end

Student.h:

#import <Foundation/Foundation.h>
#import "protocolText.h"
@interface Student : NSObject<protocolText>
@property(nonatomic,retain) id<protocolText> stuDelegate;
-(void)receive;//叫老师收试卷
-(void)Excise; //学生做试卷
@end

Student.m:

#import "Student.h"
@implementation Student
-(void)receive
{
    if ([_stuDelegate respondsToSelector:@selector(ReceivePager)]) {
        [_stuDelegate ReceivePager];
    }
}
-(void)Excise
{
    NSLog(@"学生做试卷");
}
- (void)dealloc
{
    [_stuDelegate release];
    [super dealloc];
}
@end

Teacher.h:

#import <Foundation/Foundation.h>
#import "protocolText.h"
@interface Teacher : NSObject<protocolText>
@property(nonatomic,retain) id<protocolText> teaDelegate;
-(void)excise; //叫学生做试卷
-(void)SendPager;
-(void)ReceivePager;//老师收试卷
@end

Teacher.m:

#import "Teacher.h"
@implementation Teacher
-(void)SendPager
{
    NSLog(@"老师发试卷");
}
-(void)excise
{
    if ([_teaDelegate respondsToSelector:@selector(Excise)]) {
        [_teaDelegate Excise];
    }
}
-(void)ReceivePager
{
    NSLog(@"老师收试卷");
}
- (void)dealloc
{
    [_teaDelegate release];
    [super dealloc];
}
@end

main:

#import <Foundation/Foundation.h>
#import "Student.h"
#import "Teacher.h"
int main(int argc, const char * argv[])
{
    @autoreleasepool {
        Student *stu = [[[Student alloc] init] autorelease];
        Teacher *tea = [[[Teacher alloc] init] autorelease];
        stu.stuDelegate = tea;
        tea.teaDelegate = stu;
        //老师发试卷
        [tea SendPager];
        //老师叫学生做试卷
        [tea excise];
        //学生叫老师收试卷
        [stu receive];
    }
    return 0;
}

结果：

2013-08-05 19:59:47.083 作业3[2817:303] 老师发试卷

2013-08-05 19:59:47.085 作业3[2817:303] 学生做试卷

2013-08-05 19:59:47.086 作业3[2817:303] 老师收试卷