Question

我正在开展一个Ionic项目，我想在其中上传照片并将其添加到Firebase存储中的特定节点。现在我要做的就是在STORAGE中上传照片相反，我想要的是将这些照片上传到存储中，但是在节点中引用它们，如下所示：

我已经通过在imgur上传照片并在那里复制链接来手动完成，但我需要一个自动程序让用户将照片上传到特定的城市。
让我们说用户在一个城市，拍照并将其上传到Firebase。通过在STORAGE上传它，可以获取他所在的城市名称，并通过调用它来添加新照片，例如＆＃34; UserName_CityName_Photo＆＃34;。但是，由于用户可以在不同时间上传同一城市的多张照片，如何轻松上传新照片而不会覆盖已存储的照片？
出于这个原因，我想知道是否有一种方法可以将照片上传到存储上，而不是直接上传到数据库上，例如通过生成引用URL，以便每个新照片都简单地附加在相应的节点下。

Answer 1

因此，您可以将图像上传到Firebase数据库，但它必须是二进制或奇怪的东西，而且通常不会接受这种做法。要使这些网址在存储空间中独一无二，您可以将其上传到CityName - ＆gt; autoIdKey将是唯一的。这也意味着一个城市的所有图像都将以其存储名称存储，以后可能会很方便。

您可以使用this code

获取当前用户所在城市

import Foundation
import MapKit

typealias JSONDictionary = [String:Any]

class LocationServices {

    let shared = LocationServices()
    let locManager = CLLocationManager()
    var currentLocation: CLLocation!

    let authStatus = CLLocationManager.authorizationStatus()
    let inUse = CLAuthorizationStatus.authorizedWhenInUse
    let always = CLAuthorizationStatus.authorizedAlways

    func getAdress(completion: @escaping (_ address: JSONDictionary?, _ error: Error?) -> ()) {

        self.locManager.requestWhenInUseAuthorization()

        if self.authStatus == inUse || self.authStatus == always {

            self.currentLocation = locManager.location

            let geoCoder = CLGeocoder()

            geoCoder.reverseGeocodeLocation(self.currentLocation) { placemarks, error in

                if let e = error {

                    completion(nil, e)

                } else {

                    let placeArray = placemarks as? [CLPlacemark]

                    var placeMark: CLPlacemark!

                    placeMark = placeArray?[0]

                    guard let address = placeMark.addressDictionary as? JSONDictionary else {
                        return
                    }

                    completion(address, nil)

                }

            }

        }

    }

}

获取城市名称的功能：

    func getCityName() -> String {
        LocationServices.shared.getAdress { address, error in
            if let a = address, let city = a["City"] as? String {
                   return city
            }
            else {
                return "NO_CITY_NAME"
            }
        }
    }

上传并获取存储网址：

@IBAction func postPressed(_ sender: Any) {

        // get the cityname
        let city = getCityName()
        let uid = Auth.auth().currentUser!.uid
        let ref = Database.database().reference()
        let storage = Storage.storage().reference(forURL: "gs://YourUrlHere")
        let key = ref.child("pois").childByAutoId().key // unique key

        let imageRef = storage.child("pois").child(city).child("\(key).jpg")

        let data = UIImageJPEGRepresentation(photo, 0.6) 

        let uploadTask = imageRef.putData(data!, metadata: nil) { (metadata, error) in
            if error != nil {
                // do something
                return
            }

            imageRef.downloadURL(completion: {(url, error) in
                // upload of image worked now get the url to upload to your database

                if let url = url, let author = Auth.auth().currentUser?.displayName {
                    let feed = ["city": ,
                                "pathToImage": url.absoluteString, // here is your storage url to upload to Firebase DB
                                : key] as [String: Any]

                    let postFeed = ["\(key)" : feed]

                    ref.child("pois").updateChildValues(postFeed, withCompletionBlock: { (error, success) in
                        if error != nil {
                            // do something
                            return
                        }
                        else {
                            // data successfully uploaded
                        }            
                    })
                }
            })
        }
        uploadTask.resume()

        uploadTask.observe(.success) { (snapshot) in
            // do something when upload is finished
            return
        }
        uploadTask.observe(.failure) { (snapshot) in
            // do something on failure
            return
        }
}

Firebase - 是否可以在数据库节点下而不是在存储中上传照片？

1 个答案: