ios - 根据(城市)从 firebase 检索数据

Question

我正在使用 swift 开发 iOS 应用程序，我在应用程序的 firebase 仪表板中有以下数据

Users =     
{
    "07a5fa11-2a09-455b-92bf-a86dcd9d3e3e" =         
     {
        Name = "Hissah";
        Category = "Art & Designe";
        City = "Riyadh";
        Email = "H@him.fm";
        ShortDescription = "";
    };
    "08e5443c-cdde-4fda-8733-8c4fce75dd34" =         
    {
        Name = "Sara";
        Category = "Cheefs";
        City = "Dubai";
        Email = "Sara@gmail.com";
        ShortDescription = "best cake ever . ";
    };

如何将(城市)为“Riyadh”的用户的(姓名)检索到 TableView 中？

提前致谢。

Answer 1

把这个扔进圈子里，因为它是一个简单的答案，并解决了一个可用于填充 tableView 的数据源

let ref = Firebase(url:"https://your-app.firebaseio.com/users")

ref.queryOrderedByChild("City").queryEqualToValue("Riyadh")
   .observeEventType(.Value, withBlock: { snapshot in

            //iterate over all the values read in and add each name
            //  to an array
            for child in snapshot.children {
              let name = child.value["Name"] as! NSString
              self.tableViewDataSourceArray.append(name)
            }

            //the tableView uses the tableViewDataSourceArray
            // as it's dataSource
            self.tableView.reloadData() 

})

编辑:后续评论询问如何将文本添加到 NSTextView

ref.queryOrderedByChild("City").queryEqualToValue("Riyadh")
   .observeEventType(.Value, withBlock: { snapshot in

            //iterate over all the values and add them to a string
            var s = String()
            for child in snapshot.children {
              let name = child.value["Name"] as! NSString
              s += name + "\n" // the \n puts each name on a line
            }

            //add the string we just build to a textView
            let attrString = NSAttributedString(string: s)
            self.myTextView.textStorage?.appendAttributedString(attrString)

})