消息推送，客户端需要调用的方法

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken

{

    NSString *token = [[deviceTokendescription] stringByTrimmingCharactersInSet:[NSCharacterSetcharacterSetWithCharactersInString:@"<>"]];

    NSString *aDeviceToken = [tokenstringByReplacingOccurrencesOfString:@" "withString:@""];//aDeviceToken即是需要的字符串

    

    NSLog(@"deviceToken:%@", aDeviceToken);

}