push notification handling boilerplate

gistfile1.m

@interface AppDelegate () {
    NSDictionary *pushUserInfo;
}
@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // ...
    
    [application registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound];
    
    NSDictionary *userInfo = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
    if (userInfo)
        dispatch_async(dispatch_get_main_queue(), ^{
            [self handlePush:userInfo];
        });
    
    return YES;
}

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    // FIXME: USE YOUR CODE HERE
    [[PushTokenManager sharedManager] sendToken:deviceToken];
}

- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
    NSLog(@"Failed to register remote notification: %@", error);
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
    if (application.applicationState == UIApplicationStateInactive) {
        // 푸시를 눌러서 앱을 실행했음
        [self handlePush:userInfo];
    } else {
        // 앱이 실행된 상태에서 푸시를 수신함
        pushUserInfo = userInfo;
        NSString *msg;
        id payload = [userInfo valueForKeyPath:@"aps.alert"];
        if ([payload isKindOfClass:[NSString class]])
            msg = payload;
        else
            msg = payload[@"body"];
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil
                                                        message:msg
                                                       delegate:self
                                              cancelButtonTitle:@"취소"
                                              otherButtonTitles:@"자세히 보기", nil];
        [alert show];
    }
}

- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 1) {
        // "자세히 보기"를 눌렀을 경우
        [self handlePush:pushUserInfo];
    }
    pushUserInfo = nil;
}

- (void)handlePush:(NSDictionary *)userInfo {
    [self clearNotifications];
    // FIXME: TAKE ACTION!
}

- (void)clearNotifications {
    [[UIApplication sharedApplication] setApplicationIconBadgeNumber:1];
    [[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];
}

@end