這功能不會太複雜所以我也不細說直些附上完整的程式碼跟git連結
https://github.com/h81061678/Button-countdown
貼心小提醒，UIButton的Type要設定為Custom，這樣數字再變更時才不會有閃爍的問題
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var label: UILabel!
@IBOutlet weak var sendButton: UIButton!
var timeStop:Int!
var timer:Timer?
var counter = 20
override func viewDidLoad() {
super.viewDidLoad()
sendButton.layer.cornerRadius = 5;
label.text = "還沒處發";
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
if self.timer != nil{
self.timer?.invalidate()
}
}
func timerEanbled(){
sendButton.backgroundColor = UIColor(named: "reColor");
sendButton.layer.borderWidth = 2
sendButton.layer.borderColor = UIColor.red.cgColor
self.timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(resendButton), userInfo: nil, repeats: true)
}
@objc func resendButton(){
if (counter > 1){
counter = counter - 1
label.text = "已觸發";
sendButton.setTitle(" 於\(counter)秒後可觸發 ", for: .normal)
}else{
label.text = "可重新觸發";
sendButton.layer.borderWidth = 0
sendButton.isEnabled = true
sendButton.setTitleColor(.white, for: .normal)
sendButton.backgroundColor = UIColor(named: "myColor");
self.timer?.invalidate()
sendButton.setTitle("重新發送", for: .normal)
counter = 20
}
}
@IBAction func sendAction(_ sender: UIButton) {
sendButton.isEnabled = false;
self.timerEanbled()
}
}
