UIKit框架之NSObject

首先学习NSObject 

//

//  ViewController.m

//  localization

//

//  Created by City--Online on 15/5/15.

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

//



#import "ViewController.h"



@interface ViewController ()



@end



@implementation ViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    //NSObject内包含 alloc、init方法

    NSObject *obj=[[NSObject alloc]init];

    //父类

    NSLog(@"superClass: %@",[obj superclass]);

    //当前类

    NSLog(@"Class: %@",[obj class]);

    //copy

    NSLog(@"copy: %@",[NSObject copy]);

    //hash

    NSLog(@"hash:%ld",[obj hash]);

    //description

    NSLog(@"description: %@",[obj description]);

    //debugDescription

    NSLog(@"debugDescription: %@",[obj debugDescription]);

//    - (id)performSelector:(SEL)aSelector;

//    - (id)performSelector:(SEL)aSelector withObject:(id)object;

//    - (id)performSelector:(SEL)aSelector withObject:(id)object1 withObject:(id)object2;

    [self performSelector:@selector(test)];

    //isProxy

    BOOL isProxy=[obj isProxy];

    NSLog(@"isProxy: %d",isProxy);

    

//    - (BOOL)isKindOfClass:(Class)aClass;

//    - (BOOL)isMemberOfClass:(Class)aClass;

//    - (BOOL)conformsToProtocol:(Protocol *)aProtocol;

//    - (BOOL)respondsToSelector:(SEL)aSelector;

    

    //来确定一个对象是否是一个类的成员，或者是派生自该类的成员

    BOOL isKindOfClass=[obj isKindOfClass:[NSObject class]];

    NSLog(@"isKindOfClass:%d",isKindOfClass);

    

    //只能确定一个对象是否是当前类的成员

    BOOL isMemberOfClass=[obj isMemberOfClass:[NSObject class]];

    NSLog(@"isMemberOfClass:%d",isMemberOfClass);

    

    //是用来检查对象是否实现了指定协议类的方法

    BOOL IsConformsToProtocol=[obj conformsToProtocol:@protocol(UIApplicationDelegate)];

    NSLog(@"IsConformsToProtocol: %d",IsConformsToProtocol);

    

    //用来判断是否有以某个名字命名的方法(被封装在一个selector的对象里传递)

    BOOL isRespondsToSelector=[obj respondsToSelector:@selector(hash)];

    NSLog(@"isRespondsToSelector:%d",isRespondsToSelector);

    

    // selector 用来判断实例是否有以某个名字命名的方法. 和上面一个不同之处在于, 前面这个方法可以用在实例和类上，而此方法只能用在类上

    BOOL isInstancesRespondToSelector=[NSObject instancesRespondToSelector:@selector(hash)];

    NSLog(@"isInstancesRespondToSelector:%d",isInstancesRespondToSelector);

    

   

}

-(void)test

{

    NSLog(@"test");

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}



@end