迁移 Adapty iOS SDK 至 v3.15

如果你在观察者模式下使用付费墙编辑工具，从 iOS SDK 3.15 开始，你需要实现一个新方法 observerModeDidInitiateRestorePurchases(onStartRestore:onFinishRestore:)。该方法为恢复逻辑提供了更精细的控制，让你可以在自定义流程中处理购买恢复操作。完整的实现细节，请参阅在观察者模式下展示付费墙编辑工具付费墙。

func observerMode(didInitiatePurchase product: AdaptyPaywallProduct,
                 onStartPurchase: @escaping () -> Void,
                 onFinishPurchase: @escaping () -> Void) {
      // use the product object to handle the purchase
      // use the onStartPurchase and onFinishPurchase callbacks to notify AdaptyUI about the process of the purchase
}

+ func observerModeDidInitiateRestorePurchases(onStartRestore: @escaping () -> Void,
+                                            onFinishRestore: @escaping () -> Void) {
+      // use the onStartRestore and onFinishRestore callbacks to notify AdaptyUI about the process of the restore
+ }