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@implementation SAViewController
 
-(id)init
{
    if (self = [super init]){
        self.view.backgroundColor = [UIColor whiteColor];
 
        // 1、设置监听
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(recive:) name:@"notification" object:nil];
 
        // 创建一个按钮，当按钮点击时触发通知发送事件
        UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
        button.frame = CGRectMake(10, 50, 50, 30);
        [button setTitle:@"abc" forState:UIControlStateNormal];
        [self.view addSubview:button];
        [button addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
    }
    return self;
}
 
- (void)buttonClick
{
 
    // 2、发送通知
    NSDictionary *dic = [NSDictionary dictionaryWithObject:@"value" forKey:@"key"];
 
    [[NSNotificationCenter defaultCenter] postNotificationName:@"notification" object:nil userInfo:dic];
 
}
 
// 3、通知响应
- (void)recive:(NSDictionary *)userInfo
{
    NSLog(@"%@", userInfo);
}
@end

@implementation SAViewController -(id)init { if (self = [super init]){ self.view.backgroundColor = [UIColor whiteColor]; // 1、设置监听 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(recive:) name:@"notification" object:nil]; // 创建一个按钮，当按钮点击时触发通知发送事件 UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem]; button.frame = CGRectMake(10, 50, 50, 30); [button setTitle:@"abc" forState:UIControlStateNormal]; [self.view addSubview:button]; [button addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside]; } return self; } - (void)buttonClick { // 2、发送通知 NSDictionary *dic = [NSDictionary dictionaryWithObject:@"value" forKey:@"key"]; [[NSNotificationCenter defaultCenter] postNotificationName:@"notification" object:nil userInfo:dic]; } // 3、通知响应 - (void)recive:(NSDictionary *)userInfo { NSLog(@"%@", userInfo); } @end