在 iOS 上不使用 GCM 接收推送通知

Posted 2023-02-24

【中文标题】在 iOS 上不使用 GCM 接收推送通知

【英文标题】：Don't receive push notifications with GCM on iOS

【发布时间】：2015-08-09 17:31:09

【问题描述】：

我按照本教程 https://developers.google.com/cloud-messaging/ios/client 在我的 iOS 应用程序上实现 Google Cloud Messaging。我使用谷歌应用引擎作为服务器端和 GCM 的 Java 库来发送消息，它非常适合我的 android 应用程序。但是我的 iOS 应用程序没有收到来自它的消息。

我不明白为什么，因为我确实获得了注册令牌并将其发送到我的服务器端。我没有收到任何错误日志。这是我的 AppDelegate.m 代码：​​

#import "AppDelegate.h"

@interface AppDelegate ()

@property (nonatomic, strong) NSDictionary *registrationOptions;
@property (nonatomic, strong) GGLInstanceIDTokenHandler registrationHandler;

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
//-- Start the GCMService
[[GCMService sharedInstance] startWithConfig:[GCMConfig defaultConfig]];
if ([application respondsToSelector:@selector(isRegisteredForRemoteNotifications)])

    // iOS 8 Notifications
    [application registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];

    [application registerForRemoteNotifications];

else

    // iOS < 8 Notifications
    [application registerForRemoteNotificationTypes:
     (UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound)];

self.registrationHandler = ^(NSString *registrationToken, NSError *error)
    if (registrationToken != nil) 
//I do get the token, and I can store it
        NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
        [defaults setObject:registrationToken forKey:CLE_TOKENGCM];
        NSLog(@"Registration Token: %@", registrationToken);
     else 
        NSLog(@"Registration to GCM failed with error: %@", error.localizedDescription);
    
;
return YES;



- (void)application:(UIApplication *)application
didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken 
// Start the GGLInstanceID shared instance with the default config and request a registration
// token to enable reception of notifications
NSLog(@"didRegisterForRemoteNotificationsWithDeviceToken");
[[GGLInstanceID sharedInstance] startWithConfig:[GGLInstanceIDConfig defaultConfig]];
self.registrationOptions = @kGGLInstanceIDRegisterAPNSOption:deviceToken,
                         kGGLInstanceIDAPNSServerTypeSandboxOption:@NO;//I tried both YES and NO value
[[GGLInstanceID sharedInstance] tokenWithAuthorizedEntity:SENDER_ID
                                                    scope:kGGLInstanceIDScopeGCM
                                                  options:self.registrationOptions
                                                  handler:self.registrationHandler];


- (void)application:(UIApplication *)app didFailToRegisterForRemoteNotificationsWithError:(NSError *)err 
NSLog(@"Error in registration. Error: %@", err);


- (void)onTokenRefresh 
// A rotation of the registration tokens is happening, so the app needs to request a new token.
NSLog(@"The GCM registration token needs to be changed.");
[[GGLInstanceID sharedInstance] tokenWithAuthorizedEntity:SENDER_ID
                                                    scope:kGGLInstanceIDScopeGCM
                                                  options:self.registrationOptions
                                                  handler:self.registrationHandler];



- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))handler 
NSLog(@"Notification received: %@", userInfo);//This log never prints so the method is never called
// This works only if the app started the GCM service
[[GCMService sharedInstance] appDidReceiveMessage:userInfo];
// Handle the received message
// Invoke the completion handler passing the appropriate UIBackgroundFetchResult value
// ...


- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo 
NSLog(@"Notification received: %@", userInfo);//This log never prints so the method is never called
// This works only if the app started the GCM service
[[GCMService sharedInstance] appDidReceiveMessage:userInfo];
// Handle the received message
// Invoke the completion handler passing the appropriate UIBackgroundFetchResult value
// ...


@end

【问题讨论】：

您是否生成了 APN 证书并在服务器上使用它们？

您是否尝试过sample GCM iOS project，它会在日志中为您提供更多信息，例如，如果您错过了 APN 证书。

我在 didFinishLaunchingWithOptions 中将 registrationToken 设为 nil。有什么想法吗？

【参考方案1】：

感谢 ztan 评论和 Google GCM sample，我发现了问题所在：我必须像这样实现 applicationDidBecomeActive:：

- (void)applicationDidBecomeActive:(UIApplication *)application 
    // Connect to the GCM server to receive non-APNS notifications
    [[GCMService sharedInstance] connectWithHandler:^(NSError *error) 
        if (error) 
            NSLog(@"Could not connect to GCM: %@", error.localizedDescription);
         else 
            NSLog(@"Connected to GCM");
            // ...
        
    ];