Question

大家好，我需要帮助的人）...我想做一个按钮＆＃34; snapShotButton＆＃34;当我按下按钮3次时，我想发出警告，写下你需要付费使用这个应用程序＆＃34;。当我按下＆＃34; ok＆＃34;他会用MKStoreKit支付......我有MKStoreKit，我的应用程序是视频编辑器......感谢您的帮助！[/ p>

＆＃13;

func addButtons() {

let snapShotButton = UIButton(type: .system)
        snapShotButton.setImage(#imageLiteral(resourceName: "snapShot").withRenderingMode(.alwaysOriginal), for: .normal)
        snapShotButton.translatesAutoresizingMaskIntoConstraints = false
        bottomTabBar.addSubview(snapShotButton)
        snapShotButton.centerYAnchor.constraint(equalTo: bottomTabBar.centerYAnchor).isActive = true
        snapShotButton.centerXAnchor.constraint(equalTo: bottomTabBar.centerXAnchor).isActive = true
        snapShotButton.heightAnchor.constraint(equalToConstant: 32).isActive = true
        snapShotButton.widthAnchor.constraint(equalToConstant: 32).isActive = true
        snapShotButton.addTarget(self, action: #selector(snapShotButtonTapped), for: .touchUpInside)
        snapShotButton.addTarget(self, action: #selector(counterAction), for: .touchUpInside)
    }

func counterAction(sender:UIButton){
        
        counter -= 1
        print(counter)
        
        if counter == 0 {
        MKStoreKit.shared().initiatePaymentRequestForProduct(withIdentifier: "com.steinlogic.iapdemo.quarterly")
        }
    }
    
    
    func snapShotButtonTapped() {
        pauseVideo()
        PHPhotoLibrary.shared().performChanges({
            PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: self.videoURL)
        }) { saved, error in
            if saved {
                DispatchQueue.main.async { _ in
                    self.dismiss(animated: true, completion: nil)
                }
            }
            else {
                self.alertErrors()
            }
        }
        //alertNotAvailable()
    }

＆＃13;

Answer 1

您应该将计数器的值保存在UserDefaults中，并在每次启动应用后进行检索。付款完成后，您可以完全跳过计数器减少。

按钮上的计数器“保存”

1 个答案: