我遵循了本教程 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 token 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

最佳答案

感谢 ztan 评论和 Google GCM sample ，我发现出了什么问题: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");
            // ...
        }
    }];
}

关于ios - 不要在 iOS 上使用 GCM 接收推送通知，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31906927/