iOS10本地通知UNUserNotificationCenter

1，使用UNUserNotificationCenter

（1）创建UNUserNotificationCenter，设置推送模式和代理。

UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
[center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert|UNAuthorizationOptionSound|UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) {
    if (!error) {
        NSLog(@"succeeded!");
    }
}];
center.delegate = self;

（2）设置推送内容

UNMutableNotificationContent *content = [UNMutableNotificationContent new];
content.title = @"推送中心标题";
content.subtitle = @"副标题";
content.body  = @"这是UNUserNotificationCenter信息中心";
content.badge = @20;
content.categoryIdentifier = @"categoryIdentifier";
//        需要解锁显示，红色文字。点击不会进app。
//        UNNotificationActionOptionAuthenticationRequired = (1