Google Cloud Firestore

对于Firebase的集成与使用，没别的，看文档就行了。
个人使用CocoaPods方式:

pod 'Firebase/Firestore'

我需要在AppDelegate.m获取数据:

1. import 库

@import Firebase;

2. 配置

[FIRApp configure];

3. 获取数据

FIRFirestore *firestore = [FIRFirestore firestore];
    FIRDocumentReference *adRef = [[firestore collectionWithPath:@"users"] documentWithPath:@"haha"];
    [adRef getDocumentWithSource:(FIRFirestoreSourceServer) completion:^(FIRDocumentSnapshot * _Nullable snapshot, NSError * _Nullable error) {
        if (snapshot.exists) {
            // Document data may be nil if the document exists but has no keys or values.
            NSLog(@"Document: %@", snapshot.data);
          } else {
              NSLog(@"Document does not exist");
          }
    }];

然后获取数据时，遇到报错:

8.6.1 - [Firebase/Firestore][I-FST000001] Could not reach Cloud Firestore backend. Backend didn't respond within 10 seconds.
This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.

8.6.1 - [Firebase/Firestore][I-FST000001] WatchStream (2809da718) Stream error: 'Unavailable: failed to connect to all addresses'

对上以上两个报错，尤其第一条很让人迷惑，很确信当时网络没有问题...
刚开始怀疑集成过程漏掉了什么，重新建了一个firebase项目，按照文档对Cloud Firestore重新来了一遍，依然报同样的错误...

然后google时，搜到Could not reach Cloud Firestore backend. Backend didn't respond within 10 seconds #7615这个issue，虽然有点没太看懂，但也基本确定我的问题和这个issue的不一样。

当我打开fq代理后...成功了-_- 天晴了