使用唯一ID推入Firebase [英] Push into Firebase with unique ID

问题描述

我正在构建我的第一个iOS应用程序，并将Firebase作为后端。

我试图将数组存储到我的Firebase后端， ：

  Firebase * f = [[Firebase alloc] initWithUrl：@https://test.firebaseio.com/items ]。 
 [f setValue：@ {@UNIQUE OBJECT ID HERE：@ {@meh：@lol，@hum：@kek}}]; 
  

它按预期工作，但是我需要为每个对象设置一个唯一的ID。现在，每次运行该方法时，Firebase都会将新数据替换为旧数据。

从Web开发背景来看，我知道在JavaScript中我会这样做：

  var ref = new Firebase（https://test.firebaseio.com/items）; 
 ref.push（{meh：lol，hum：kek）}; 
  

得到预期的结果，因为它提供了一个名称为-IuxeSuSiNy6xiahCXa0的对象。 / p>

如何在ObjC中完成此项工作？

解决方案

在Objective-C中的系统中，但是语法却是一个不同的触摸。

  Firebase * ref; 
 
 Firebase * autoId = [ref childByAutoId]; 
  

  Firebase * f = [[Firebase alloc] initWithUrl：@https://test.firebaseio.com/items]; 
 [f setValue：@ {@UNIQUE OBJECT ID HERE：@ {@meh：@lol，@hum：@kek}}]; 
  

应该是：

  Firebase * f = [[Firebase alloc] initWithUrl：@https://test.firebaseio.com/items]; 
 [[f childByAutoId] setValue：@ {@meh：@lol，@hum：@kek}}]; 
  

I'm building my first iOS app and I'm using Firebase as my backend.

I'm trying to store an array into my Firebase backend like so:

Firebase* f = [[Firebase alloc] initWithUrl:@"https://test.firebaseio.com/items"];
[f setValue:@{@"UNIQUE OBJECT ID HERE": @{@"meh": @"lol", @"hum": @"kek"}}];

It works as expected, but I need to have an unique id for each "object". Right now, every time that method runs Firebase just replaces the old data with the new one.

Coming from a web dev background, I know that in JavaScript I would do this:

var ref = new Firebase("https://test.firebaseio.com/items");
ref.push({meh: "lol", hum: "kek")};

Which yields the expected result, since it gives the object above a name of "-IuxeSuSiNy6xiahCXa0".

How do I accomplish this in ObjC?

解决方案

Firebase has build in system in Objective-C as well, but the syntax is a touch different.

Firebase * ref;

Firebase * autoId = [ref childByAutoId];

This:

Firebase* f = [[Firebase alloc] initWithUrl:@"https://test.firebaseio.com/items"];
[f setValue:@{@"UNIQUE OBJECT ID HERE": @{@"meh": @"lol", @"hum": @"kek"}}];

Should be:

Firebase* f = [[Firebase alloc] initWithUrl:@"https://test.firebaseio.com/items"];
[[f childByAutoId] setValue:@{@"meh": @"lol", @"hum": @"kek"}}];

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