我有一个将数据发送到Parse的按钮操作。按下按钮后,标题将变为取消,当"取消"按下按钮,数据从Parse中删除。我想知道如何在60秒后使用NSTimer自动取消。我也有一个数组设置(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)
}
答案 0 :(得分:0)
您应该使用NSTimer.scheduledTimerWithTimeInterval
,只需替换此行:
self.timer = NSTimer(timeInterval: 60.0, target: self, selector: #selector (self.refresh), userInfo: nil, repeats: false)
与
self.timer = NSTimer.scheduledTimerWithTimeInterval(60.0, target: self, selector: #selector (self.refresh), userInfo: nil, repeats: false)
如果您想了解有关创建计时器的更多信息,请阅读NSTimer Class Reference。