Notifications 类型UNUserNotificationCenter没有当前成员，swift 2.3

在iOS10中，用户通知被苹果重新修改。 现在，我正在尝试调整我的应用程序以适应这些更改，如下所示：

给我一个错误：

Type UNUserNotificationCenter has no member current, swift 2.3

---

我知道那个教程可能是给swift3的。但我需要在swift 2.3中实现。它是否可行？如果可行，怎么做？

文档本身似乎存在冲突。虽然它描述了

current（）

方法并说明如何使用它，但示例显示了

let center=UNUserNotificationCenter.currentNotificationCenter（）

---

正如您所说，这可能是一个Swift版本依赖关系。

文档本身似乎存在冲突。虽然它描述了

current（）

方法并说明如何使用它，但示例显示了

let center=UNUserNotificationCenter.currentNotificationCenter（）

正如您所说，这可能是一个Swift版本依赖项。

对于Xcode 8/ios9/10

只需使用：

import  UserNotifications

。

//注意：如果你在前台，你将永远不会被呼叫

对于Xcode 8/ios9/10

只需使用：

import  UserNotifications

。

//注意：如果你在前台，你将永远不会被呼叫

导入此：

import  UserNotifications

在

appDelegate

文件中使用以下命令实现此委托：

UNUserNotificationCenterDelegate

这将允许您访问以下方法：

func userNotificationCenter(_ center: UNUserNotificationCenter, openSettingsFor notification: UNNotification?) {}

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {}

func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {}

然后将其添加到应用程序代理的

didfishlaunchwithoptions

方法中，以将其绑定起来

if #available(iOS 10.0, *) {
    // For iOS 10 display notification (sent via APNS)
    UNUserNotificationCenter.current().delegate = self

    let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
    UNUserNotificationCenter.current().requestAuthorization(
        options: authOptions,
        completionHandler: {_, _ in })
} else {
    let settings: UIUserNotificationSettings =
        UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
    application.registerUserNotificationSettings(settings)
}
application.registerForRemoteNotifications()

导入此文件：

import  UserNotifications

在

appDelegate

文件中使用以下命令实现此委托：

UNUserNotificationCenterDelegate

这将允许您访问以下方法：

func userNotificationCenter(_ center: UNUserNotificationCenter, openSettingsFor notification: UNNotification?) {}

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {}

func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {}

然后将其添加到应用程序代理的

didfishlaunchwithoptions

方法中，以将其绑定起来

if #available(iOS 10.0, *) {
    // For iOS 10 display notification (sent via APNS)
    UNUserNotificationCenter.current().delegate = self

    let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
    UNUserNotificationCenter.current().requestAuthorization(
        options: authOptions,
        completionHandler: {_, _ in })
} else {
    let settings: UIUserNotificationSettings =
        UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
    application.registerUserNotificationSettings(settings)
}
application.registerForRemoteNotifications()

swift 4.1

if #available(iOS 10.0, *) {

UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate

    let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
    UNUserNotificationCenter.current().requestAuthorization(options: authOptions, completionHandler: {_, _ in
        self.getNotificationSettings()
    })

} else {
    // Fallback on earlier versions
    let settings: UIUserNotificationSettings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
    UIApplication.shared.registerUserNotificationSettings(settings)
}
DispatchQueue.main.async {
    UIApplication.shared.registerForRemoteNotifications()
}

swift 4.1

if #available(iOS 10.0, *) {

UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate

    let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
    UNUserNotificationCenter.current().requestAuthorization(options: authOptions, completionHandler: {_, _ in
        self.getNotificationSettings()
    })

} else {
    // Fallback on earlier versions
    let settings: UIUserNotificationSettings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
    UIApplication.shared.registerUserNotificationSettings(settings)
}
DispatchQueue.main.async {
    UIApplication.shared.registerForRemoteNotifications()
}

---

你能发一个链接到那些例子吗，因为我现在被困得更远了，原因可能相同？@Async-在线文档：你能发一个链接到那些例子吗，因为我现在被困得更远了，原因可能相同？@Async-在线文档：这是最好的答案。这是最好的答案。