爲什麼日期始終雖然今天我傳遞不同的日期

Question

這是我的代碼

let dateValue = formatterDate.dateFromString(request.date) 
     print("da = \(request.date)") 
     let dayValue = NSDate() 
     let compnentsDate = myCalendar.components(.Year, fromDate: dateValue!) 
     let componentsDay = myCalendar.components(.Year, fromDate: dayValue) 
     if compnentsDate.year == componentsDay.year && compnentsDate.month == componentsDay.month && compnentsDate.day == componentsDay.day { 
      cell.dateLabel.text = "today" 
     }else { 
      if compnentsDate.year == componentsDay.year && compnentsDate.month == componentsDay.month && compnentsDate.day == (componentsDay.day + 1){ 
      cell.dateLabel.text = "tomorrow" 
      }else { 
       cell.dateLabel.text = request.date 
      } 

     } 

當你看到我正在打印，並且打印的值是：

da = Jan, 25, 2016 

然而，代碼總是去第一個if語句，並告訴我「今天」

爲什麼要這樣？

我的代碼有什麼問題？

Answer 1

當您調用components:fromDate:函數時，您需要指定所需的所有組件。

您需要通過.Year，.Month和.Day，而不僅僅是.Year。事情是這樣的：

let compnentsDate = myCalendar.components([.Year , .Month , .Day], fromDate: dateValue!) 
let componentsDay = myCalendar.components([.Year , .Month , .Day], fromDate: dayValue)