使用Swift 3.0查询Firebase

您需要使用

queryOrderedByChild

createdAt

Today

let ref = FIRDatabase.database().reference().child("thoughts").queryOrdered(byChild: "createdAt").queryEqual(toValue : "Today")ref.observe(.value, with:{ (snapshot: FIRDataSnapshot) in    for snap in snapshot.children {        print((snap as! FIRDataSnapshot).key)    }})