如何在60秒後取消NSTimer？

Question

我有一個將數據發送給Parse的按鈕操作。一旦按下按鈕，標題將變爲取消，當按下「取消」按鈕時，數據將從Parse中刪除。我想知道如何在60秒後用NSTimer自動取消。我有一個數組設置太（VAR isCalling = FALSE）

// Function called by within NSTimer in button action 

func refresh(){ 
    self.callButtonTapped(nil) 
    !isCalling 
} 

// Within the button action 

    if error == nil { 
         //Success 
         self.isCalling = true 
         self.callButton.setTitle("Cancel", forState: UIControlState.Normal) 
         self.timer = NSTimer(timeInterval: 60.0, target: self, selector: #selector (self.refresh), userInfo: nil, repeats: false) 
        } 

Answer 1

你應該使用NSTimer.scheduledTimerWithTimeInterval，只需更換這行：

self.timer = NSTimer.scheduledTimerWithTimeInterval(60.0, target: self, selector: #selector (self.refresh), userInfo: nil, repeats: false) 

如果你想

self.timer = NSTimer(timeInterval: 60.0, target: self, selector: #selector (self.refresh), userInfo: nil, repeats: false) 

讀NSTimer Class Reference瞭解更多關於創建計時器的信息。