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下载三打一 App iOS 设备：从 App Store 下载 Android 设备：从 Google Play 商店下载 打开 App 选择注册方式 手机号注册 邮箱注册 4. 手机号注册 输入手机号码和验证码 设置密码 5. 邮箱注册 输入邮箱地址和验证码 设置密码 输入姓名、身份证号、地址等个人信息 7. 支付押金 根据提示支付押金（一般为 299 元） 8. 身份验证 上传身份证正反面照片 人脸识别验证 9. 提交资料 提交所有资料并等待审核 10. 审核通过 审核通过后，即可使用三打一账号 注意： 确保输入的信息真实准确。 人脸识别时，请正对摄像头，确保光线充足。 支付押金时，请使用实名认证过的支付宝或微信账号。

NSObject, SKProductsRequestDelegate { // Define the product identifier for the app let productId = "YOUR_PRODUCT_IDENTIFIER" override init() { super.init() // Set up the product request let request = SKProductsRequest(productIdentifiers: Set([productId])) request.delegate = self request.start() } func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) { // Check if the product is 影音ailable if let product = response.products.first { print("Found product: \(product.productIdentifier)") // Initiate the purchase let payment = SKPayment(product: product) SKPaymentQueue.default().add(payment) } else { print("Product not found") } } func request(_ request: SKRequest, didFailWithError error: Error) { print("Error retrieving product: \(error)") } } ``` Android ```kotlin import com.android.billingclient.api. class AppDownloadManager(val context: Context) : PurchasesUpdatedListener { // Define the product identifier for the app val productId = "YOUR_PRODUCT_IDENTIFIER" // Create the BillingClient private val billingClient = BillingClient.newBuilder(context).setListener(this).build() init { // Connect to the Play Store billingClient.startConnection(object : BillingClientStateListener { override fun onBillingSetupFinished(billingResult: BillingResult) { if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) { // The billing client is ready to use querySkuDetails() } } override fun onBillingServiceDisconnected() { // The billing service was disconnected } }) } private fun querySkuDetails() { val skuDetailsParams = SkuDetailsParams.newBuilder() .setSkusList(listOf(productId)) .setType(BillingClient.SkuType.INAPP) .build() billingClient.querySkuDetailsAsync(skuDetailsParams) { billingResult, skuDetailsList -> if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) { // The SKU details are 影音ailable val skuDetails = skuDetailsList?.first { it.sku == productId } if (skuDetails != null) { purchase(skuDetails) } } } } private fun purchase(skuDetails: SkuDetails) { val purchaseParams = BillingFlowParams.newBuilder() .setSkuDetails(skuDetails) .build() billingClient.launchBillingFlow(context, purchaseParams) } override fun onPurchasesUpdated(billingResult: BillingResult, purchases: List?) { // Handle the purchase results } } ```