Firebase / Swift：childSnapshotForPath访问自动ID数据？ [英] Firebase/Swift: childSnapshotForPath access autoID data?

问题描述

我目前正在努力访问存储在路径中的其他数据，更具体的来自子文件夹的数据。我的设置如下所示：

  userID {
用户名：Andreas，
性别：男，
年龄：18，
 footballTeams {
 Team1 {
 name：My team 1 
 matchesPlayed：3 
} 
} 
} $所以我现在运行这个代码来抓住用户名，性别和年龄：
 
 $ $ $ $ $ $ $ $ $ $ $ $ $ ref $（$用户$）$ code $ .. 
 var username = String（snapshot1.value！[username] as！String）
 var gender = String（snapshot1.value！[gender] as！String）
 var age = Int（snapshot1.value！[age] as！Int）
}）
  

然而，我想抓取存储在footballTeams路径中的所有球队名称，比如Team1，Team2，Team3等。所以我偶然发现了 snapshot1.childSnapshotForPath（footballTeams / Te AM1 ）。值！[ 名称 ] 。不过，只要我知道每个团队的名称路径的确切名称，这将工作，但这是存储为自动ID。任何想法如何我会这样做？

感谢提前。

解决方案

当您选择使用 childSnapshotForPath 时，您是正确的。你只需要得到 / footballTeams 分支快照并迭代它就可以得到每个孩子。

在
 var username = String（snapshot1.value！[username] as！）中的observeEventType（.ChildAdded，withBlock：{（snapshot1：FIRDataSnapshot）） ）
 var gender = String（snapshot1.value！[gender] as！String）
 var age = Int（snapshot1.value！[age] as！Int）
 if让footballTeamsSnapshot = snapshot1.childSnapshotForPath（footballTeams）为？FIRDataSnapshot {
 for footballTeamsSnapshot.children.allObjects as [FDataSnapshot] {
 print（child.value）
} 
} 
}）
  

I am currently struggling with accessing other data stored in a path, more specific the data from a sub-folder. My setup looks like this:

userID{
    username:Andreas,
    gender:Male,
    age:18,
    footballTeams{
       Team1{
           name:My team 1
           matchesPlayed:3
       }
    }
}

So I am currently running this code to grab both username, gender and age:

ref.child("Users").observeEventType(.ChildAdded, withBlock: { (snapshot1:FIRDataSnapshot) in                   
      //code goes here..
      var username = String(snapshot1.value!["username"] as! String)
      var gender = String(snapshot1.value!["gender"] as! String)
      var age = Int(snapshot1.value!["age"] as! Int)                  
})

However, I want to grab all the team names stored in the footballTeams path, ordered like 'Team1, Team2, Team3' etc. So I stumbled upon "snapshot1.childSnapshotForPath("footballTeams/Team1").value!["name"]". However, this would have worked, as long as I knew the exact name of each team name-path, but this is stored as auto ID. Any ideas on how I would approach this?

Thanks in advance.

解决方案

You were on the right way when chose to work with childSnapshotForPath. You just have to get the /footballTeams branch snapshot and iterate over it to get each child.

ref.child("Users").observeEventType(.ChildAdded, withBlock: { (snapshot1:FIRDataSnapshot) in                   
      var username = String(snapshot1.value!["username"] as! String)
      var gender = String(snapshot1.value!["gender"] as! String)
      var age = Int(snapshot1.value!["age"] as! Int)
      if let footballTeamsSnapshot = snapshot1.childSnapshotForPath("footballTeams") as? FIRDataSnapshot {
        for child in footballTeamsSnapshot.children.allObjects as [FDataSnapshot] {
            print(child.value)
        }
      }         
})

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