Adapty Kotlin Multiplatform SDK 3.15.0 是一个主要版本，带来了新功能和改进，但可能需要您执行一些迁移步骤。

1. 更新观察者类和方法名称。
2. 更新备用付费墙方法名称。
3. 更新事件处理方法中的视图类名称。

更新观察者类和方法名称

观察者类及其注册方法已重命名：

import com.adapty.kmp.AdaptyUI
- import com.adapty.kmp.AdaptyUIObserver
+ import com.adapty.kmp.AdaptyUIPaywallsEventsObserver
import com.adapty.kmp.models.AdaptyUIAction
- import com.adapty.kmp.models.AdaptyUIView
+ import com.adapty.kmp.models.AdaptyUIPaywallView

- class MyAdaptyUIObserver : AdaptyUIObserver {
-    override fun paywallViewDidPerformAction(view: AdaptyUIView, action: AdaptyUIAction) {
+ class MyAdaptyUIPaywallsEventsObserver : AdaptyUIPaywallsEventsObserver {
+    override fun paywallViewDidPerformAction(view: AdaptyUIPaywallView, action: AdaptyUIAction) {
        // handle actions
    }
}

// Set up the observer
- AdaptyUI.setObserver(MyAdaptyUIObserver())
+ AdaptyUI.setPaywallsEventsObserver(MyAdaptyUIPaywallsEventsObserver())

更新备用付费墙方法名称

设置备用付费墙的方法名称已更改：

import com.adapty.kmp.Adapty

- Adapty.setFallbackPaywalls(assetId = "fallback.json")
+ Adapty.setFallback(assetId = "fallback.json")
    .onSuccess {
        // Fallback paywalls loaded successfully
    }
    .onError { error ->
        // Handle the error
    }

更新事件处理方法中的视图类名称

所有事件处理方法现在使用新的 AdaptyUIPaywallView 类替代 AdaptyUIView：

- override fun paywallViewDidAppear(view: AdaptyUIView) {
+ override fun paywallViewDidAppear(view: AdaptyUIPaywallView) {
    // Handle paywall appearance
}

- override fun paywallViewDidDisappear(view: AdaptyUIView) {
+ override fun paywallViewDidDisappear(view: AdaptyUIPaywallView) {
    // Handle paywall disappearance
}

- override fun paywallViewDidSelectProduct(view: AdaptyUIPaywallView, productId: String) {
+ override fun paywallViewDidSelectProduct(view: AdaptyUIView, productId: String) {
    // Handle product selection
}

- override fun paywallViewDidStartPurchase(view: AdaptyUIView, product: AdaptyPaywallProduct) {
+ override fun paywallViewDidStartPurchase(view: AdaptyUIPaywallView, product: AdaptyPaywallProduct) {
    // Handle purchase start
}

- override fun paywallViewDidFinishPurchase(view: AdaptyUIView, product: AdaptyPaywallProduct, purchaseResult: AdaptyPurchaseResult) {
+ override fun paywallViewDidFinishPurchase(view: AdaptyUIPaywallView, product: AdaptyPaywallProduct, purchaseResult: AdaptyPurchaseResult) {
    // Handle purchase result
}

- override fun paywallViewDidFailPurchase(view: AdaptyUIView, product: AdaptyPaywallProduct, error: AdaptyError) {
+ override fun paywallViewDidFailPurchase(view: AdaptyUIPaywallView, product: AdaptyPaywallProduct, error: AdaptyError) {
    // Add your purchase failure handling logic here
}

- override fun paywallViewDidFinishRestore(view: AdaptyUIView, profile: AdaptyProfile) {
+ override fun paywallViewDidFinishRestore(view: AdaptyUIPaywallView, profile: AdaptyProfile) {
    // Add your successful restore handling logic here
}

- override fun paywallViewDidFailRestore(view: AdaptyUIView, error: AdaptyError) {
+ override fun paywallViewDidFailRestore(view: AdaptyUIPaywallView, error: AdaptyError) {
    // Add your restore failure handling logic here
}

- override fun paywallViewDidFinishWebPaymentNavigation(view: AdaptyUIView, product: AdaptyPaywallProduct?, error: AdaptyError?) {
+ override fun paywallViewDidFinishWebPaymentNavigation(view: AdaptyUIPaywallView, product: AdaptyPaywallProduct?, error: AdaptyError?) {
    // Handle web payment navigation result
}

- override fun paywallViewDidFailLoadingProducts(view: AdaptyUIView, error: AdaptyError) {
+ override fun paywallViewDidFailLoadingProducts(view: AdaptyUIPaywallView, error: AdaptyError) {
    // Add your product loading failure handling logic here
}

- override fun paywallViewDidFailRendering(view: AdaptyUIView, error: AdaptyError) {
+ override fun paywallViewDidFailRendering(view: AdaptyUIPaywallView, error: AdaptyError) {
    // Handle rendering error
}