IOS8注册推送消息

IOS8在UIApplication文件中有说明：

- (void)registerForRemoteNotificationTypes:(UIRemoteNotificationType)types NS_DEPRECATED_IOS(3_0, 8_0, "Please use registerForRemoteNotifications and registerUserNotificationSettings: instead");

// Returns the enabled types, also taking into account any systemwide settings; doesn't relate to connectivity.

- (UIRemoteNotificationType)enabledRemoteNotificationTypes NS_DEPRECATED_IOS(3_0, 8_0, "Please use -[UIApplication isRegisteredForRemoteNotifications], or -[UIApplication currentUserNotificationSettings] to retrieve user-enabled remote notification and user notification settings");

在IOS8下，采用了新的方法来注册推送和获取推送开启状态

注册推送的代码：

    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) {

        [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];

        [[UIApplication sharedApplication] registerForRemoteNotifications];

    }

    else {

        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert];

    }

判断推送是否打开的代码：

+(BOOL)enabledRemoteNotification {

    UIRemoteNotificationType types;

    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) {

        types = [[UIApplication sharedApplication] currentUserNotificationSettings].types;

    }

    else {

        types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];

    }

    return (types & UIRemoteNotificationTypeAlert);

}