我有以下计数计时器,但是在我运行程序后,UILable 从 0 然后生成到 ((。但是计数器号是正确的,因为我可以看到打印日志是正确的。我可以知道代码出了什么问题。
@IBOutlet weak var labelForBinaryCount: UILabel!
var timer = Timer()
var counter = 0
@IBAction func start() {
timer = Timer.scheduledTimer(timeInterval: 1, target:self, selector: #selector(Resting.updateCounter), userInfo: nil, repeats: true)
}
override func viewDidLoad() {
super.viewDidLoad()
labelForBinaryCount.text = String(counter)
}
func updateCounter() {
labelForBinaryCount.text = String(describing: counter += 1)
print(counter)
}
@IBAction func pauseButton(sender: AnyObject) {
timer.invalidate()
}
@IBAction func clearButton(sender: AnyObject) {
timer.invalidate()
counter = 0
labelForBinaryCount.text = String(counter)
}`
试试这个:
func updateCounter() {
counter += 1
labelForBinaryCount.text = String(counter)
print(counter)
}
我想你明白了。 ;)