Swift read userInfo of remote notification
IosJsonSwiftPush NotificationUserinfoIos Problem Overview
I implemented a function to open an AlertView when I receive a remote notification like this:
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]){
var notifiAlert = UIAlertView()
var NotificationMessage : AnyObject? = userInfo["alert"]
notifiAlert.title = "TITLE"
notifiAlert.message = NotificationMessage as? String
notifiAlert.addButtonWithTitle("OK")
notifiAlert.show()
}
But NotificationMessage is always nil.
My json payload looks like this:
{"aps":{"alert":"Testmessage","badge":"1"}}
I am using Xcode 6, Swift and I am developing for iOS8. I searched hours now, but didn't find any useful information. The Notifications works perfectly.. and if I click it, the alertview opens. My problem is, that I am not able to get the data out of userInfo.
Ios Solutions
Solution 1 - Ios
The root level item of the userInfo
dictionary is "aps"
, not "alert"
.
Try the following:
if let aps = userInfo["aps"] as? NSDictionary {
if let alert = aps["alert"] as? NSDictionary {
if let message = alert["message"] as? NSString {
//Do stuff
}
} else if let alert = aps["alert"] as? NSString {
//Do stuff
}
}
Solution 2 - Ios
Swift 5
struct Push: Decodable {
let aps: APS
struct APS: Decodable {
let alert: Alert
struct Alert: Decodable {
let title: String
let body: String
}
}
init(decoding userInfo: [AnyHashable : Any]) throws {
let data = try JSONSerialization.data(withJSONObject: userInfo, options: .prettyPrinted)
self = try JSONDecoder().decode(Push.self, from: data)
}
}
Usage:
guard let push = try? Push(decoding: userInfo) else { return }
let alert = UIAlertController(title: push.aps.alert.title, message: push.aps.alert.body, preferredStyle: .alert)
Solution 3 - Ios
Method (Swift 4):
func extractUserInfo(userInfo: [AnyHashable : Any]) -> (title: String, body: String) {
var info = (title: "", body: "")
guard let aps = userInfo["aps"] as? [String: Any] else { return info }
guard let alert = aps["alert"] as? [String: Any] else { return info }
let title = alert["title"] as? String ?? ""
let body = alert["body"] as? String ?? ""
info = (title: title, body: body)
return info
}
Usage:
let info = self.extractUserInfo(userInfo: userInfo)
print(info.title)
print(info.body)
Solution 4 - Ios
For me, when I send the message from Accengage, the following code works -
private func extractMessage(fromPushNotificationUserInfo userInfo:[NSObject: AnyObject]) -> String? {
var message: String?
if let aps = userInfo["aps"] as? NSDictionary {
if let alert = aps["alert"] as? NSDictionary {
if let alertMessage = alert["body"] as? String {
message = alertMessage
}
}
}
return message
}
The only difference from Craing Stanford's answer is the key
I used to extract message from alert
instance which is body
which is different. See below for more clearification -
if let alertMessage = alert["message"] as? NSString
vs
if let alertMessage = alert["body"] as? String
Solution 5 - Ios
This is my version for objC
if (userInfo[@"aps"]){
NSDictionary *aps = userInfo[@"aps"];
if (aps[@"alert"]){
NSObject *alert = aps[@"alert"];
if ([alert isKindOfClass:[NSDictionary class]]){
NSDictionary *alertDict = aps[@"alert"];
if (alertDict[@"message"]){
NSString *message = alertDict[@"message"];
}
}
else if (aps[@"alert"]){
NSString *alert = aps[@"alert"];
}
}
}
Solution 6 - Ios
> Alert should be showing while the app is in active state. So check the state is active or not.
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
if application.applicationState == .active {
if let aps = userInfo["aps"] as? NSDictionary {
if let alertMessage = aps["alert"] as? String {
let alert = UIAlertController(title: "Notification", message: alertMessage, preferredStyle: UIAlertControllerStyle.alert)
let action = UIAlertAction(title: "Ok", style: .default, handler: nil)
alert.addAction(action)
self.window?.rootViewController?.present(alert, animated: true, completion: nil)
}
}
}
completionHandler(.newData)
}
> From this if a user need message then he can get alert message.
Solution 7 - Ios
I use APNs Provider and json payload as below
{
"aps" : {
"alert" : {
"title" : "I am title",
"body" : "message body."
},
"sound" : "default",
"badge" : 1
}
}
Due to the provider originates it as a JSON-defined dictionary that iOS converts to an NSDictionary
object, without subscript like Dictionary
, but can use value(forKey:)
Reference from here
This's my way for Swift 4
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
guard application.applicationState == .active else { return }
guard let alertDict = ((userInfo["aps"] as? NSDictionary)?.value(forKey: "alert")) as? NSDictionary,
let title = alertDict["title"] as? String,
let body = alertDict["body"] as? String
else { return }
let alertController = UIAlertController(title: title, message: body, preferredStyle: .alert)
let okAct = UIAlertAction(title: "Ok", style: .default, handler: nil)
alertController.addAction(okAct)
self.window?.rootViewController?.present(alertController, animated: true, completion: nil)
completionHandler(UIBackgroundFetchResult.noData)
}