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