通知中心 NSNotificationCenter
#import <Foundation/Foundation.h>
#import "Person.h"
#import "NewsCompany.h"
int main(int argc, const char * argv[])
{
@autoreleasepool {
// 1.初始化机构
NewsCompany *tx = [[NewsCompany alloc] init];
tx.name = @"腾讯新闻";
NewsCompany *sina = [[NewsCompany alloc] init];
sina.name = @"新浪新闻";
// 2.初始化3个人
Person *zhangsan = [[Person alloc] init];
zhangsan.name = @"张三";
Person *lisi = [[Person alloc] init];
lisi.name = @"李四";
Person *wangwu = [[Person alloc] init];
wangwu.name = @"王五";
NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
// 3.添加监听器
// zhangsan只监听tx发出的junshi_news_come通知
// 2
[center addObserver:zhangsan selector:@selector(newsCome:) name:@"junshi_news_come" object:nil];
[center addObserver:zhangsan selector:@selector(newsCome:) name:@"yule_news_come" object:nil];
// 1
[center addObserver:lisi selector:@selector(newsCome:) name:nil object:tx];
// 2
[center addObserver:wangwu selector:@selector(newsCome:) name:nil object:nil];
// 4.发布新闻
// tx发布了一则叫做junshi_news_come的通知
[center postNotificationName:@"junshi_news_come"
object:tx
userInfo:@{@"title" : @"伊拉克战争停止了",
@"intro" : @"伊拉克战争停止了.........."}];
// sina发布了一则叫做junshi_news_come的通知
[center postNotificationName:@"yule_news_come"
object:sina
userInfo:@{@"title" : @"6456456456456",
@"intro" : @"7657567567567"}];
}
return 0;
}
#import <Foundation/Foundation.h>
@interface NewsCompany : NSObject
/**
* 机构名称
*/
@property (nonatomic, copy) NSString *name;
@end
#import "NewsCompany.h"
@implementation NewsCompany
@end
#import <Foundation/Foundation.h>
@interface Person : NSObject
/**
* 姓名
*/
@property (nonatomic, copy) NSString *name;
- (void)newsCome:(NSNotification *)note;
@end
#import "Person.h"
#import "NewsCompany.h"
@implementation Person
- (void)newsCome:(NSNotification *)note
{
// 通知的发布者
NewsCompany *obj = note.object;
NSLog(@"%@接收到了%@发出的通知,通知内容是:%@", self.name, obj.name, note.userInfo);
}
- (void)dealloc
{
// [super dealloc];
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
@end
