object c NSNotificationCenter 通知中心

Object C的NSNotificationCenter类似android的广播

Objective-C

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@implementation Boss -(void)sendNotification {     //发送通知     NSDictionary *message = @{@"notification" : @"contacts every one!"};       //创建通知对象（老板登陆boss账号）     NSNotification * notification = [NSNotification notificationWithName:@"fky" object:self userInfo:message];       //向通知中心发送消息（发布消息）     [[NSNotificationCenter defaultCenter] postNotification:notification];   } @end

注意：notificationWithName 需要和addObserver 的name 一样

Objective-C

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@implementation HumanResources - (instancetype)init {     self = [super init];     if (self) {         //注册监听         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(doSomething:) name:@"fky" object:nil];     }     return self; }   -(void)doSomething:(NSNotification *)notification {       //处理的方法     NSDictionary *rec= [notification userInfo];     //输出收到的信息     NSLog(@"收到广播：%@", rec[@"notification"]); }   @end