如何解決「沒有更多上下文含糊不清的表達方式」？在SWIFT 3.0

-1

func setTimeLeft() { let timeNow = NSDate() { 

    if timeEnd.compare(timeNow as Date) == ComparisonResult.orderedDescending { 
     let calendar = NSCalendar.current 
     let components = calendar.components([.day , .hour , .minute , .second] , fromDate: timeNow, toDate: timeEnd, options: []) 

     var dayText = String(components.day) + "d " 
     var hourText = String(components.hour) + "h " 

     // Hide day and hour if they are zero 
     if components.day <= 0 { 
      dayText = "" 
      if components.hour <= 0 { 
       hourText = "" 
      } 
     } 
     timeLeftLabel.text = dayText + hourText + String(components.minute) + "m " + String(components.second) + "s" 

    } else { 
     timeLeftLabel.text = "Ended" 
    } 
}

我是新手，我只是停留在這個錯誤錯誤在行如何解決「沒有更多上下文含糊不清的表達方式」？在SWIFT 3.0

let components = calendar.components([.day , .hour , .minute , .second] , fromDate: timeNow, toDate: timeEnd, options: [])

來源

2017-02-15 Bilal

使用Calendar而不是NSCalendar因爲NSCalendar.current也會給Calendar實例，然後使用dateComponents(_:from:to:)從日曆中獲取DateComponents方法。

let calendar = Calendar.current 
let components = calendar.dateComponents([.day , .hour , .minute , .second], from: timeNow, to: timeEnd)

來源

2017-02-15 10:08:57

做到了，但同樣的錯誤仍然是有 – Bilal

@Bilal你有沒有跟我更換你的代碼，什麼是錯誤？你能顯示屏幕快照如果可能的話。請注意，此方法中沒有可選參數。 –

謝謝:)它的工作和錯誤刪除:) – Bilal

如何解決「沒有更多上下文含糊不清的表達方式」？在SWIFT 3.0

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