如何包含firebase快照键值? [Swift]
问题描述:
请任何人告诉我如何包括快照键值和儿童价值,我已经附加到我的数组(忘记包括它,现在记得我必须)...除了那些真的我当我尝试解决我自己的问题时,无法理解,通过使用此方法首先测试值:print(rooms.popFirst().key!)
我的数据库值的一半得到了nil
的值?如果我不包括这种方法,一切都很好,但如果你无法想象,但我真的希望你的建议或建议,以获得所有数据与自己的关键价值... 这是我的代码到目前为止:如何包含firebase快照键值? [Swift]
Database.database().reference().child("rooms").observe(.value, with: { (snapshot) in
print()
var rooms = snapshot.value as! [String:AnyObject]
for(_,value) in rooms {
if (rooms.popFirst()?.key) != nil{
let title = value["title"] as? String
let description = value["description"] as? String
let roomPictureUrl = value["Room Picture"] as? String
let longitude = value["Longtitude"] as? String
let latitude = value["Latitude"] as? String
let dateFrom = value["Date From"] as? String
let dateTo = value["Date To"] as? String
let owner = value["Owner"] as? String
let myRooms = Room(roomID: "XXX",title: title!, description: description!, roomPicutreURL: roomPictureUrl!, longitude: longitude!, latitude: latitude!, dateFrom: dateFrom!, dateTo: dateTo!, owner: owner!)
//print(rooms.popFirst()?.key)
self.rooms.append(myRooms)
self.tableView.reloadData()
}
}
})
答
试试这个:
Database.database().reference().child("rooms").observe(.value, with: { (snapshot) in
var rooms = snapshot.value as! [String:AnyObject]
let roomKeys = Array(rooms.keys)
for roomKey in roomKeys {
guard
let value = rooms[roomKey] as? [String:AnyObject]
else
{
continue
}
let title = value["title"] as? String
let description = value["description"] as? String
let roomPictureUrl = value["Room Picture"] as? String
let longitude = value["Longtitude"] as? String
let latitude = value["Latitude"] as? String
let dateFrom = value["Date From"] as? String
let dateTo = value["Date To"] as? String
let owner = value["Owner"] as? String
let myRooms = Room(roomID: "XXX",title: title!, description: description!, roomPicutreURL: roomPictureUrl!, longitude: longitude!, latitude: latitude!, dateFrom: dateFrom!, dateTo: dateTo!, owner: owner!)
print(roomKey)
self.rooms.append(myRooms)
self.tableView.reloadData()
}
}
})
答
要想从快照键可以使用下面的代码行,它会给你造成像-> Kqwewsds12 -> your child Details
let dictValues = [String](snapshot.keys)
print(dictValues[0]) //Output -- Kqwewsds12