Swift 3 Firebase 存儲 - 無法上傳

Question

我正在嘗試將 UIImage 文件上傳到 firebase 存儲。 我正在努力弄清楚為什么上傳沒有完成，即使是調試。

我創建了一個 Firebase 應用並將存儲規則設置為可公開訪問。

存儲引用在屬性中定義如下：

var storageRef = FIRStorage.storage().reference().child("images/TestImage.png")

然后在上傳方法中（其中meal.photo 是一個UIImage）：

let uploadData = UIImagePNGRepresentation(meal.photo!)
let uploadTask = storageRef.put(uploadData!,metadata: nil){ metadata, error in
                if (error != nil) {
                    // Uh-oh, an error occurred!
                } else {
                    // Metadata contains file metadata such as size, content-type, and download URL.
                    let downloadURL = metadata!.downloadURL
                }
            }

我沒有收到任何構建/運行時錯誤，並且我已經確認 uploadData 包含我想要上傳的文件。 但是，運行此方法時沒有發生任何事情。 有任何想法嗎？

編輯我已經包含了下面的整個片段以供參考：

@IBAction func unwindToMealList(_ sender: UIStoryboardSegue) {
    if let sourceViewController = sender.source as? MealViewController, let meal = sourceViewController.meal {
        if let selectedIndexPath = tableView.indexPathForSelectedRow {
            // Update an existing meal.
            meals[(selectedIndexPath as NSIndexPath).row] = meal
            tableView.reloadRows(at: [selectedIndexPath], with: .none)
        } else {
            // Add a new meal.
            let newIndexPath = IndexPath(row: meals.count, section: 0)
            meals.append(meal)

            let dateFormatter = DateFormatter()
            dateFormatter.dateFormat = "MM-dd-yyyy"
            let stringDate = dateFormatter.string(from: meal.date!)
            let mealItem = ["name": meal.name, "date": stringDate, "mealType": meal.mealType] as [String : Any]
            tableView.insertRows(at: [newIndexPath], with: .bottom)
            // Add meal to firebase database
            let mealRef = ref.child("meals")
            mealRef.setValue(mealItem)


            // Upload photo
           // let imagesRef = storageRef.child("images")
            let uploadData = UIImagePNGRepresentation(meal.photo!)
            let uploadTask = storageRef.put(uploadData!,metadata: nil){ metadata, error in
                if (error != nil) {
                    // Uh-oh, an error occurred!
                } else {
                    // Metadata contains file metadata such as size, content-type, and download URL.
                    let downloadURL = metadata!.downloadURL
                    print(downloadURL)
                }
            }
        }
        // Save the meals.
        saveMeals()
    }
}

Answer 1

試試這個，我想你把 saveMeals() 函數提前了，所以，上傳方法沒有調用......

@IBAction func unwindToMealList(_ sender: UIStoryboardSegue) {
if let sourceViewController = sender.source as? MealViewController, let meal = sourceViewController.meal {
    if let selectedIndexPath = tableView.indexPathForSelectedRow {
        // Update an existing meal.
        meals[(selectedIndexPath as NSIndexPath).row] = meal
        tableView.reloadRows(at: [selectedIndexPath], with: .none)
    } else {
        // Add a new meal.
        let newIndexPath = IndexPath(row: meals.count, section: 0)
        meals.append(meal)

        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "MM-dd-yyyy"
        let stringDate = dateFormatter.string(from: meal.date!)
        let mealItem = ["name": meal.name, "date": stringDate, "mealType": meal.mealType] as [String : Any]
        tableView.insertRows(at: [newIndexPath], with: .bottom)
        // Add meal to firebase database
        let mealRef = ref.child("meals")
        mealRef.setValue(mealItem)


        // Upload photo
       // let imagesRef = storageRef.child("images")
        let uploadData = UIImagePNGRepresentation(meal.photo!)
        let uploadTask = storageRef.put(uploadData!,metadata: nil){ metadata, error in
            if (error != nil) {
                // Uh-oh, an error occurred!
            } else {
                // Metadata contains file metadata such as size, content-type, and download URL.
                let downloadURL = metadata!.downloadURL
                print(downloadURL)
                // New code, put your saveMeals function here.
                self.saveMeals()
            }
        }
    }
    // Old code, please remove this saveMeals function.
    // Save the meals.
    saveMeals()
}

}