iOS 10 不调用通知服务扩展

Question

我尝试实现新的通知服务扩展，但遇到问题。

在我的 NotificationService.swift 文件中我有这段代码:

class NotificationService: UNNotificationServiceExtension {

var contentHandler: ((UNNotificationContent) -> Void)?
var bestAttemptContent: UNMutableNotificationContent?

override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
    self.contentHandler = contentHandler
    bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

    if let bestAttemptContent = bestAttemptContent {
        // Modify the notification content here...
        bestAttemptContent.title = "\(bestAttemptContent.title) [modified]"

        print(bestAttemptContent.body)

        contentHandler(bestAttemptContent)
    }
}

override func serviceExtensionTimeWillExpire() {
    // Called just before the extension will be terminated by the system.
    // Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
    if let contentHandler = contentHandler, let bestAttemptContent =  bestAttemptContent {
        contentHandler(bestAttemptContent)
    }
}
}

当我收到推送通知时，didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) 方法从未被调用。

也许我误解了这个扩展的工作原理？

Answer 1

检查您在服务扩展上的部署目标。

在使用 10.1 的设备上进行测试时，我将部署目标设置为 10.2，并且在我更改它之前不会调用扩展。

另一个问题可能是调试......为了使其正常工作，您需要附加服务扩展进程。在 Xcode 菜单 Debug > Attach To Process > Name of your extension