// check if ID exist Future checkDocuement(String docID) async { final snapShot = await FirebaseFirestore.instance .collection('collectionName') .doc(docID) // varuId in your case .get(); if (snapShot == null || !snapShot.exists) { // docuement is not exist print('id is not ...
在flutter的云firestore中检查是否存在文档,可以通过以下步骤进行: 1. 引入Firebase插件:在Flutter项目中的`pubspec.yaml`文件中添加`cloud_fire...
FirebaseFirestore firestore = FirebaseFirestore.instance; 使用Firestore的doc()和get()方法检查文件是否存在。假设你有一个集合名为files,其中的每个文件都有一个唯一的文档ID(例如文件名): 代码语言:txt 复制 String fileName = 'your_file_name'; bool fileExists = false; void checkFileExists(...
/// Flutter导入 import 'package:flutter/material.dart'; import 'package:flutter_riverpod/flutter_riverpod.dart'; /// Firebase导入 import 'package:firebase_core/firebase_core.dart'; import 'firebase_options.dart'; /// 导入其他页面 import 'package:counter_firebase/normal_counter_page.dart'; ///...
Firebase是谷歌提供的一个移动后台服务(mBaaS)。 Firebase可以很容易地将数据存储和通过云同步、应用认证、消息通知、应用分析和性能测量等功能添加到移动应用。 Firebase 服务列表 Firebase的费用 有两种收费方案 有关每个方案的限制和详细价格,请参见官方网站。
If I run it on my own real device, it runs fine. I checked the firebase_messaging build settings under the pod_runner, and I have a suspision that it might be due to "Excluded architectures" when running a simulator on my ARM macbook: simplenotezy changed the title 🐛 [Firebase_...
使用Flutter 和 Firebase 制作!计数器应用程序目录Flutter 概述和特点Firebase 概览和服务列表开发环境准备编码Firebase Analytics编Firebase Crashlytics...
initState(); _checkIfAdmin(); } Future<void> _checkIfAdmin() async { String uid = FirebaseAuth.instance.currentUser!.uid; bool admin = await _isAdmin(uid); setState(() { isAdmin = admin; }); } @override Widget build(BuildContext context) { if (!isAdmin) { return Scaffold( app...
Hello, There is an issue that concerns me, which is that the Flutter web application does not work on most hosting platforms. Instead, it only displays a white page. An example of this is Firebase hosting, where the application screen re...
我设法通过在执行查询之前对传递给函数的参数添加条件检查来修复它。只是有点奇怪，因为上面的函数甚至没...