Firebase / iOS 更新数据

Question

如何更新 Firebase 中生成的 child 记录？我收到以下关于特殊字符的错误，有没有办法生成没有特殊字符的 child 自动 ID？

这是 child 自动 ID 的样子：-JmJFEe-Kq4BLLNfR0Ta

我的代码：

  NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

    NSString *myString = [prefs stringForKey:@"refString"];
    A0SimpleKeychain *keychain = [[Application sharedInstance] store];
    A0UserProfile *profile = [NSKeyedUnarchiver unarchiveObjectWithData:[keychain dataForKey:@"profile"]];
    // Create a reference to a Firebase location
    NSString *theUrl = [NSString stringWithFormat:@"https://firebaseUrlGoesHere/%@",profile.nickname];
    // Create a reference to a Firebase location
    Firebase *ref = [[Firebase alloc] initWithUrl:theUrl];
    // Write data to Firebase

    NSDictionary *feedItems = @{
                                @"description" : description.text,
                                @"url": url.text,
                                @"category" : category.text
                                };
    //Firebase unique child I'm trying to update
    Firebase *post1Ref = [ref childByAppendingPath:myString];
    [post1Ref setValue: feedItems];

这是错误：

*** Terminating app due to uncaught exception 'InvalidPathValidation', reason: '(childByAppendingPath:) Must be a non-empty string and not contain '.' '#' '$' '[' or ']''

我也尝试过使用 updateChildValues，这 returns 同样的错误。

 NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    // getting an NSString
    NSString *myString = [prefs stringForKey:@"refString"];
    A0SimpleKeychain *keychain = [[Application sharedInstance] store];
    A0UserProfile *profile = [NSKeyedUnarchiver unarchiveObjectWithData:[keychain dataForKey:@"profile"]];
    // Create a reference to a Firebase location
    NSString *theUrl = [NSString stringWithFormat:@"https://firebaseurlgoeshere/%@",profile.nickname];
    // Create a reference to a Firebase location
    Firebase *ref = [[Firebase alloc] initWithUrl:theUrl];
    Firebase *ref2 = [ref childByAppendingPath: myString];
    // Write data to Firebase

    NSDictionary *feedItems = @{
                                @"description" : description.text,
                                @"url": url.text,
                                @"category" : category.text
                                };
    
   [ref2 updateChildValues:feedItems];

Answer 1

听起来 childByAutoId 就是您要找的东西。

试试这个：

NSDictionary *feedItems = @{
                            @"description" : description.text,
                            @"url": url.text,
                            @"category" : category.text
                            };

Firebase *post1Ref = [ref childByAutoId];
[post1Ref setValue: feedItems];

更多来自 Firebase 的信息：https://www.firebase.com/docs/ios/guide/saving-data.html#section-lists

Firebase / iOS 更新数据

Firebase / iOS updating data

objective-c

firebase