【代碼筆記】iOS-NSNotificationCenter，nsnotificationcenter

【代碼筆記】iOS-NSNotificationCenter，nsnotificationcenter

代碼：

-(void)viewWillDisappear:(BOOL)animated{    [super viewWillDisappear:animated];        //移除通知    [[NSNotificationCenter defaultCenter] removeObserver:self name:@"flag" object:nil];}- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.        //註冊通知    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(setMessages) name:@"flag" object:nil];}-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    //執行通知的操作    [[NSNotificationCenter defaultCenter]postNotificationName:@"flag" object:nil];    }//通知所執行的操作-(void)setMessages{    NSLog(@"---------I--love---you!!!---------");}