购买订阅用户到 IAP 的最基本步骤

假设你知道 productID：

第一

import StoreKit

然后在你的代码中

let productID: Set = ["premium"]
let request = SKProductsRequest(productIdentifiers: productID)
request.delegate = self
request.start()

并在 SKProductsRequestDelegate：

func productsRequest(request: SKProductsRequest, didReceiveResponse response: SKProductsResponse) {
    if response.products.count > 0 {
        let product = response.products[0]
        let payment = SKPayment(product: product)
        SKPaymentQueue.defaultQueue().addPayment(payment)
    }
}