Ios 更新UI时如何同时执行2个功能

我正在实施应用内购买，效果非常好。我正在实施自动续费和不续费订阅。我可以确定任一订阅何时处于活动状态，何时过期。我可以根据订阅状态更新用户配置文件UI，但只能在每次选中一个时更新

如果我在视图即将出现时调用这两个函数。用户界面混乱，无法显示正确的状态。我已经调试并看到，如果第一个检查一个订阅，更新其状态，当我移出视图并返回时，它会检查另一个返回默认状态，即标准帐户，因为自动续费已过期。是否有一种方法可以同时运行这两个函数并同时使用它们更新UI。下面是我的代码

var isUserActive: Bool?

var user: User {
    return AppDelegate.shared.user
}

func setUserAccountType() {
    if self.isUserActive == nil {
        self.userAccountType.text = ""
        self.userGoGold.isHidden = true
    } else {
        if self.isUserActive! {
            self.userAccountType.text = "Gold Account"
        } else {
            self.userAccountType.text = "Standard Account"
            self.userGoGold.isHidden = false
        }
    }
}

override func viewDidLoad() {
    super.viewDidLoad()
    self.setUserAccountType()
    IAPManager.shared.getProducts()
}

override func viewWillAppear(_ pAnimated: Bool) {
    super.viewWillAppear(pAnimated)
    self.checkForAutoRenewableSubscription()
    self.checkForNonRenewableSubscription()
}

func setUpUserAccountStatus(_ pIsActive: Bool) {
    DispatchQueue.main.async {
        self.isUserActive = pIsActive
        self.setUserAccountType()
        self.reloadRowForIdentifier(.billing)
        self.activityIndicator.hidesWhenStopped = true
        self.activityIndicator.stopAnimating()
    }
}

func checkForAutoRenewableSubscription() {
    self.activityIndicator.startAnimating()
    self.user.checkIfSubscriptionIsActive { (pIsActive) in
        self.setUpUserAccountStatus(pIsActive)
    }
}

func checkForNonRenewableSubscription() {
    self.activityIndicator.startAnimating()
    self.user.checkifNonRenewableSubscriptionIsActive { (pSubscribed) in
        self.setUpUserAccountStatus(pSubscribed)
    }
}

您需要使用DispatchGroup，并在它的notify部分中执行您需要的操作

let dispatchGroup = DispatchGroup()
var inpIsActive = false
var inpSubscribed = false

func checkForAutoRenewableSubscription() {
    dispatchGroup.enter()
    self.activityIndicator.startAnimating()
    self.user.checkIfSubscriptionIsActive { (pIsActive) in
        self.inpIsActive = pIsActive   
        self.dispatchGroup.leave()
    }
}

func checkForNonRenewableSubscription() {
    dispatchGroup.enter()
    self.activityIndicator.startAnimating()
    self.user.checkifNonRenewableSubscriptionIsActive { (pSubscribed) in
        self.inpSubscribed = pSubscribed  
        self.dispatchGroup.leave()
    }
}

和内部视图加载

---

在何处运行dispatchGroup.notifyqueue:.main。视图将出现或？self.setUpUserAccountStatuspIsActive:Bool有一个Bool参数。你把它处理掉了吗？。因为当它要求一个？从函数中删除它，现在您的订阅有2个布尔值打印出消息两个函数都已完成，但UI现在根本不出现。setUpUserAccountStatus中的所有空白NowInner使用应答中添加的2个bool值进行配置

checkForAutoRenewableSubscription()
checkForNonRenewableSubscription() 
dispatchGroup.notify(queue: .main) { 
   self.setUpUserAccountStatus()
}