[英]How to include firebase snapshot key value? [Swift]
请任何愿意向我展示如何将快照键值以及我已经附加到数组中的子代值包括在内的人(忘记包括它,现在记住我必须这样做)……除此之外,我真的不明白什么时候我试图通过使用以下方法首先测试该值来解决自己的问题: print(rooms.popFirst().key!)
我一半的数据库值都为nil
值?! 如果我不包含该方法,那么即使您无法想象仍然很不错,但我还是希望您的建议或建议能够获取所有具有其自身键值的数据...到目前为止,这是我的代码:
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()
}
}
})
尝试这个:
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()
}
}
})
要从快照中获取密钥,您可以使用以下代码行,它将得到如下结果: -> Kqwewsds12 -> your child Details
let dictValues = [String](snapshot.keys)
print(dictValues[0]) //Output -- Kqwewsds12
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