iOS中NSNumber,NSValue,NSDate和反射

//
//  main.m
//  NSNumberTest
//
//  Created by Unisk on 13-9-19.
//  Copyright (c) 2013年 Test. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Student.h"
#import "Person.h"

#pragma mark NSNumber相关
void nsnumerTest(){
    NSNumber *number=[NSNumber numberWithInt:11];
    NSMutableArray *array=[NSMutableArray array];
    [array addObject:number];
    //    NSLog(@"%@",array);
    //    NSNumber *number1=[array lastObject];
    NSNumber *number1=array[0];
    //    NSLog(@"%@",number1);s
    int num=[number1 intValue];
    NSLog(@"%i",num);
}

#pragma mark NSValue 用法
void nsvaule(){
    CGPoint point=CGPointMake(11, 12);
    NSValue *value=[NSValue valueWithPoint:point];
    NSMutableArray *array=[NSMutableArray array];
    [array addObject:value];
    NSValue *nsVault=[array lastObject];
    CGPoint point1=[nsVault pointValue];
    BOOL  result= CGPointEqualToPoint(point, point1);
    NSLog(@"%i",result);

}

typedef struct {
    int year;
    int month;
    int day;
} Date;

#pragma mark 结构体相关
void value(){
    Date date={2013,9,18};
    // 根据结构体类型生成对应的类型描述字符串
    char *type=@encode(Date);
    NSValue *value=[NSValue value:&date withObjCType:type];

    Date date1;
    // 取出包装好的结构体
    [value getValue:&date1];
    NSLog(@"year=%i,month=%i,day=%i",date1.year,date1.month,date1.day);

}

#pragma mark NSDate
void nsDate(){
    NSDate *date=[NSDate date];
    //    NSLog(@"%@",date);
    //    [NSDate distantFuture]; 将来的某个时间
    //    [NSDate distantPast]; 过去的某个时间


    // 返回1970-1-1 到现在的秒数
    //    NSTimeInterval interval=[date timeIntervalSince1970];
    //    NSLog(@"%.0f",interval);

    //    NSDate *date1=[NSDate date];
    //    [date earlierDate:date1];
    //    [date laterDate:date1];

    NSDateFormatter *formater=[[[NSDateFormatter alloc] init]autorelease];
    formater.dateFormat=@"yyyy-MM-dd hh:mm:ss";
    NSString *string=[formater stringFromDate:date];
    NSLog(@"%@",string);

}

#pragma mark 相关
void classTest(){
    Student *stu=[[[Student alloc] init]autorelease];

    //isKindOfClass 判断对象是否属于某个类，或者子类
    if ([stu isKindOfClass:[Person class]]) {
        NSLog(@"是的");
    }
    //isMemberOfClass 判断某个类是否属于某个类，不包含子类
    if ([stu isMemberOfClass:[Student class]]) {
        NSLog(@"不是");
    }

    //直接调用
    //    [stu test];
    //间接调用
    [stu performSelector:@selector(test)];

}

#pragma mark 反射相关
void reflect(){
    NSString *str=@"Person";
    //将字符串转换为class类
    Class class=NSClassFromString(str);
    //实例化对象
    Person *person=[[[class alloc] init] autorelease];
    NSLog(@"%@",person);

    //将类转换为string
    //    NSString *str=NSStringFromClass([Person class]);
    //    NSLog(@"%@",str);

    //方法的反射
    NSString *method=@"test";
    // 根据字符串得到方法
    SEL selector=NSSelectorFromString(method);
    [person performSelector:selector];

}


int main(int argc, const char * argv[])
{
    @autoreleasepool {
        reflect();
    }
    return 0;
}

#import <Foundation/Foundation.h>

@interface Person : NSObject

-(void)test;

@end

#import "Person.h"
@implementation Person

-(void)test{
    NSLog(@"test  被调用了");
}

@end

#import "Person.h"
@interface Student : Person

-(void)test:(NSString *) string;

@end

#import "Student.h"
@implementation Student

-(void)test:(NSString *)string{
    NSLog(@"test %@被调用了",string);
}

@end