我试图从Firebase中获取属于其他孩子的值。例如,让我们把这部分作为我的JSON

{
  "Snuses" : {
      "CATCH EUCALYPTUS WHITE LARGE" : {
          "Brand" : "Catch",
          "Products" : "CATCH EUCALYPTUS WHITE LARGE",
          "Some property" : "21.6",
        },
        "CATCH DRY EUCALYPTUS WHITE MINI": {
          "Brand" : "Catch",
          "Products" : "CATCH DRY EUCALYPTUS WHITE MINI",
          "Some property" : "5.4",

        }
      "CRAFTED KARDUS HIGHLAND SINGLE CUT LOOSE" : {
        "Brand" : "Crafted Snus",
          "Products" : "CRAFTED KARDUS HIGHLAND SINGLE CUT LOOSE",
          "Some property" : "32.0",
        },
  "Brands": {
    "CATCH":0,
    "CRAFTED SNUS":0
    }
  }
}

我做了最简单的部分,把所有的“品牌”都查询到tableview。现在,如果我点击“catch”来查看其他tableview及其所有“产品”。我用的是dictionary但有其他方法吗?我想我错过了这里的逻辑。
我甚至检测到单击的单元格,并使用以下代码执行segue
    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

        return brands.count

    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("snusBrandsCell")
        if let name = brands[indexPath.row] as? String{
            let snusBrandLabel = cell?.contentView.viewWithTag(1) as! UILabel
            snusBrandLabel.text = name



        }
        return cell!
    }

    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        print("products at \(indexPath.row)  --> \(brands[indexPath.row])")


        if let products = brands[indexPath.row] as? [[String:String]]{
            valueTopass = products

            performSegueWithIdentifier("toProducts", sender: self)
        }
    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){

        if (segue.identifier == "toProducts") {
            var snusProductsView = segue.destinationViewController as! SnusProductsTableViewController
            snusProductsView.productsValue = self.valueTopass
            print(self.valueTopass)

        }
    }

}

最佳答案

我一定是哑巴。首先我需要设置“.indexon”:“.以及有效的代码:

 FIRDatabase.database().reference().child("Snuses").queryOrderedByChild("Brand").queryEqualToValue(brands[indexPath.row])
.observeSingleEventOfType(.ChildAdded, withBlock: { snapshot in
print(snapshot.key)
})

每次我在问之前都要先看医生:)希望它能帮助别人。
多亏了@dimarostopira我才得到答案

关于swift - 使用Firebase获取属于子级的键值,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/38845549/

10-12 01:38