gistfile1.txt

// cookPic
extension SignUpViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        
        var selectedImageFromPicker: UIImage?
        
        // 取得從 UIImagePickerController 選擇的檔案
        if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
            
            selectedImageFromPicker = pickedImage
        }
        
        // 可以自動產生一組獨一無二的 ID 號碼，方便等一下上傳圖片的命名
        let uniqueString = NSUUID().uuidString
        
        
        if let user = FIRAuth.auth()?.currentUser {
            uid = user.uid
            
            
            // 當判斷有 selectedImage 時，我們會在 if 判斷式裡將圖片上傳
            if let selectedImage = selectedImageFromPicker {
                
                
                let storageRef = FIRStorage.storage().reference().child("\(uniqueString).png")
                
                if let uploadData = UIImagePNGRepresentation(selectedImage) {
                    // 這行就是 FirebaseStorage 關鍵的存取方法。
                    storageRef.put(uploadData, metadata: nil, completion: { (data, error) in
                        
                        if error != nil {
                            
                            // 若有接收到錯誤，我們就直接印在 Console 就好，在這邊就不另外做處理。
                            print("Error: \(error!.localizedDescription)")
                            return
                        }
                        
                        // 連結取得方式就是：data?.downloadURL()?.absoluteString。
                        if let uploadImageUrl = data?.downloadURL()?.absoluteString {
                            
                            // 我們可以 print 出來看看這個連結事不是我們剛剛所上傳的照片。
                            print("Photo Url: \(uploadImageUrl)")
                            
                            
////////////////////////////                     cookPic                   ////////////////////////////
                            let databaseRef = FIRDatabase.database().reference(withPath: "Meal/\(self.uniqueString)").child("cookPic")
                            
                            databaseRef.setValue(uploadImageUrl, withCompletionBlock: { (error, dataRef) in
                                
                                if error != nil {
                                    
                                    print("Database Error: \(error!.localizedDescription)")
                                }
                                else {
                                    
                                    print("圖片已儲存")
                                }
                                
                            })
                            
                            
                        }
                    })
                }
            }
            dismiss(animated: true, completion: nil)
            
            
        }//uid
    }
}