如何使用NSCalendarDayChanged - 迅速

Question

下面的代碼無法正常工作（不激活calendarDayDidChange）當日期變化：

// Define identifier 
let notificationName = Notification.Name("NSNotification.Name.NSCalendarDayChanged") 

// Register to receive notification 
NotificationCenter.default.addObserver(self, selector: #selector(calendarDayDidChange(notification:)), name: notificationName, object: nil) 

方法頭是

func calendarDayDidChange(notification : NSNotification) 

Answer 1

NSCalendarDayChanged已經是輸入NSNotification.Name，所以你不需要施放它。

let notificationName: Notification.Name = .NSCalendarDayChanged 

或

let notificationName = Notification.Name.NSCalendarDayChanged