How to get GCM Notifications in ios - ios

Question

Hi I am a beginner in iOS. In my project I want to get GCM notifications for that I have written some code but it shows exception and my code is as following :
#import "AppDelegate.h"
#import <Google/CloudMessaging.h>
#import "GGLInstanceID.h"
#interface AppDelegate ()
#end
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIUserNotificationType allNotificationTypes = (UIUserNotificationTypeSound |
UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);
UIUserNotificationSettings *settings = [UIUserNotificationSettings
settingsForTypes:allNotificationTypes categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
[[UIApplication sharedApplication] registerForRemoteNotifications];
_registrationHandler = ^(NSString *registrationToken, NSError *error){
if (registrationToken != nil) {
weakSelf.registrationToken = registrationToken;
NSLog(#"Registration Token: %#", registrationToken);
NSDictionary *userInfo = #{#"registrationToken":registrationToken};
[[NSNotificationCenter defaultCenter] postNotificationName:weakSelf.registrationKey
object:nil
userInfo:userInfo];
} else {
NSLog(#"Registration to GCM failed with error: %#", error.localizedDescription);
NSDictionary *userInfo = #{#"error":error.localizedDescription};
[[NSNotificationCenter defaultCenter] postNotificationName:weakSelf.registrationKey
object:nil
userInfo:userInfo];
}
};
return YES;
}
- (void)application:(UIApplication *)application
didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
[[GGLInstanceID sharedInstance] startWithConfig:[GGLInstanceIDConfig defaultConfig]];
_registrationOptions = #{kGGLInstanceIDRegisterAPNSOption:deviceToken,
kGGLInstanceIDAPNSServerTypeSandboxOption:#YES};
[[GGLInstanceID sharedInstance] tokenWithAuthorizedEntity:_gcmSenderID
scope:kGGLInstanceIDScopeGCM
options:_registrationOptions
handler:_registrationHandler];
}
- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo {
NSLog(#"Notification received: %#", userInfo);
// This works only if the app started the GCM service
[[GCMService sharedInstance] appDidReceiveMessage:userInfo];
}
But it's shows Exception like
unresolved identifier "_registrationHandler" and "weakSelf" in
didFinishLaunchingWithOptions method and it exception in
didRegisterForRemoteNotificationsWithDeviceToken method like
unresolved identifier "_registrationOptions".
Please help me someone

Answer 1

Here I've refactored your code and it should work now.
static NSString *const INSTANCE_ID_REGISTRATION_NOTIF_KEY = #"instance-id-token";
static NSString *const GCM_SENDER_ID = #"<your sender id>"; // #"123456"
#interface AppDelegate ()
#property (nonatomic, strong, readwrite) GGLInstanceIDTokenHandler registrationHandler;
#property (nonatomic, strong, readwrite) NSString *registrationToken;
#end
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
UIUserNotificationType allNotificationTypes = (UIUserNotificationTypeSound |
UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);
UIUserNotificationSettings *settings = [UIUserNotificationSettings
settingsForTypes:allNotificationTypes categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
[[UIApplication sharedApplication] registerForRemoteNotifications];
return YES;
}
- (void)application:(UIApplication *)application
didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
[[GGLInstanceID sharedInstance] startWithConfig:[GGLInstanceIDConfig defaultConfig]];
NSDictionary *registrationOptions = #{
kGGLInstanceIDRegisterAPNSOption:deviceToken,
kGGLInstanceIDAPNSServerTypeSandboxOption:#YES
};
__weak typeof(self) weakSelf = self;
GGLInstanceIDTokenHandler handler = ^(NSString *registrationToken, NSError *error){
typeof(weakSelf) strongSelf = weakSelf;
NSDictionary *userInfo;
if (registrationToken != nil) {
strongSelf.registrationToken = registrationToken;
NSLog(#"Registration Token: %#", registrationToken);
userInfo = #{ #"registrationToken" : registrationToken };
} else {
NSLog(#"Registration to GCM failed with error: %#", error.localizedDescription);
userInfo = #{ #"error" : error.localizedDescription };
}
[[NSNotificationCenter defaultCenter] postNotificationName:INSTANCE_ID_REGISTRATION_NOTIF_KEY
object:nil
userInfo:userInfo];
};
[[GGLInstanceID sharedInstance] tokenWithAuthorizedEntity:GCM_SENDER_ID
scope:kGGLInstanceIDScopeGCM
options:registrationOptions
handler:handler];
}
- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo {
NSLog(#"Notification received: %#", userInfo);
// This works only if the app started the GCM service
[[GCMService sharedInstance] appDidReceiveMessage:userInfo];
}
#end
PS: As #Epaga commented above you should really try to start off with a simple obj-c tutorial because your compiler issues were very trivial.