Ios 如何在swift中阅读推送通知的标题或正文？

您好，我正在尝试读取swift中推送通知的标题或主体变量。出于测试目的，我创建了一个.apns文件，并使用xcrun运行该文件

apns文件如下所示：

{
    "aps" : {
        "alert" : {
            "title" : "Dein Freund ist am Joggen",
            "body" : "Schick ihm ne Anfrage bro ",
            "action-loc-key" : "PLAY"
        },
        "badge" : 5
    },
    "acme1" : "bar",
    "acme2" : [ "bang",  "whiz" ]
}

struct Payload: Decodable {
    let aps: APS
    let acme1: String?
    let acme2: [String]?
}

struct APS: Decodable {
    let alert: Alert
    let badge: Int?
}

struct Alert: Decodable {
    let title: String
    let body: String?
    let action: String?
}

这是我的推送通知功能。Userinfo是完整的消息，它返回此代码下面的输出。现在我需要.title或.body变量，如何获取它们

 func userNotificationCenter(_ center: UNUserNotificationCenter,
                              didReceive response: UNNotificationResponse,
                              withCompletionHandler completionHandler: @escaping () -> Void) {
    let userInfo = response.notification.request.content.userInfo
    // Print message ID.
    if let messageID = userInfo[gcmMessageIDKey] {
      print("Message ID: \(messageID)")
    }
    
    let application = UIApplication.shared
     
     if(application.applicationState == .active){
       //Prints the message when user tapped the notification bar when the app is in foreground
       print(userInfo)
       //Get the title of userInfo
     }
     
     if(application.applicationState == .inactive)
     {
       print("user tapped the notification bar when the app is in background")
     }

    completionHandler()
  }

userInfo的输出：

[AnyHashable("aps"): {
    alert =     {
        "action-loc-key" = PLAY;
        body = "Schick ihm ne Anfrage bro ";
        title = "Dein Freund ist am Joggen";
    };
    badge = 5;
}, AnyHashable("acme2"): <__NSArrayM 0x6000000105d0>(
bang,
whiz
)
,

[AnyHashable（“aps”）：{
警报={
“动作锁定键”=播放；
body=“Schick ihm ne Anfrage bro”；
title=“Dein Freund Is am Joggen”；
};
徽章=5；
}，AnyHashable（“acme2”）：(
猛敲
天才
)
,

您可以使用以下代码从

userInfo

字典中提取标题和正文：

let aps = userInfo["aps"] as? [String: Any]
let alert = aps?["alert"] as? [String: String]
let title = alert?["title"]
let body = alert?["body"]
print(title ?? "nil")
print(body ?? "nil")

更新：如果要使用

Codable

映射所有可能的字段，则要稍微困难一些

可以创建如下所示的模型：

{
    "aps" : {
        "alert" : {
            "title" : "Dein Freund ist am Joggen",
            "body" : "Schick ihm ne Anfrage bro ",
            "action-loc-key" : "PLAY"
        },
        "badge" : 5
    },
    "acme1" : "bar",
    "acme2" : [ "bang",  "whiz" ]
}

struct Payload: Decodable {
    let aps: APS
    let acme1: String?
    let acme2: [String]?
}

struct APS: Decodable {
    let alert: Alert
    let badge: Int?
}

struct Alert: Decodable {
    let title: String
    let body: String?
    let action: String?
}

然后，您必须使用

JSONSerialization

将

userInfo

字典转换回

Data

，最后使用

JSONDecoder

对数据进行解码：

let decoder = JSONDecoder()

do {
    let data = try JSONSerialization.data(withJSONObject: userInfo)
    let payload = try decoder.decode(Payload.self, from: data)
    print(payload.aps.alert.title)
    print(payload.aps.alert.body ?? "nil")
} catch {
    print(error)
}

---

这正是我要找的