//系统版本号

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

    //ios8.0之后设置,

    UIUserNotificationSettings *setting = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadgecategories:nil];

    //通过application告诉系统,对系统的设置

    [application registerUserNotificationSettings:setting];

    return YES;

}

//系统版本号

[[UIDevice currentDevice]systemVersion]