Swift Retreive Firebase数据

为此，您可以使用

queryOrdered(byChild:)

queryEqual(toValue:)

let ref = FIRDatabase.database().reference(withPath: "Schedule").queryOrdered(byChild: "active").queryEqual(toValue : true)ref.observe(.value, with:{ (snapshot) in    print("Count: ", snapshot.childrenCount)    for child in snapshot.children {        print("((child as! FIRDataSnapshot).value)")        //To get week you need to access key        print("((child as! FIRDataSnapshot).key)")    }})