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在过去的两周里，我一直在努力将数据写入 firebase，尽管教程看起来很简单：/....我的应用程序有一个视图控制器和一个 tableview 控制器。用户可以添加事件标题、事件日期和描述（字符串），也可以添加图片。每当我尝试运行模拟器时，它都会在我身上崩溃！请参阅下面的代码。请帮帮我，这真的很令人沮丧..即使我在代码中放置断点，它也会崩溃..如果有人可以在聊天中帮助我，那将是很棒的，或者可能发送文件以导致其严重性太长我需要一个答案，所以我明白这个问题。

import UIKit
import Firebase
import FirebaseDatabaseUI

class EventViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

//outlets for text & image
@IBOutlet weak var photoImageView: UIImageView!

@IBOutlet weak var eventName: UITextField!
@IBOutlet weak var eventDate: UITextField!
@IBOutlet weak var eventDes: UITextView!

//Database connection
let rootref = FIRDatabase().reference()
var imagePicker: UIImagePickerController = UIImagePickerController()



override func viewDidLoad() {
    super.viewDidLoad()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}


@IBAction func submitEvent(sender: AnyObject) {

    let name = eventName.text
    let date = eventDate.text
    let text = eventDes.text
    var data: NSData = NSData()
    var user = NSDictionary()//declare here

    if let image = photoImageView.image {
        data = UIImageJPEGRepresentation(image,0.1)!
    }

    let base64String = data.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.Encoding64CharacterLineLength)

    if let unwrappedName = name , unwrappedDate = date, unwrappedText = text{
        //use your declared dictionary
        user = ["name":unwrappedName, "date":unwrappedDate, "text":unwrappedText, "photoBase64":base64String]
    }


    //Add firebase child node
    //let event = FIRDatabase().reference().child(name!)
    //Do not create one more reference to database

    rootref.child(name!)
    rootref.child(name!).setValue(user)


    navigationController?.popViewControllerAnimated(true)
}

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    view.endEditing(true)
    super.touchesBegan(touches, withEvent: event)
}

    //UIImagePickerControllerDelegate methods

    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
        imagePicker.dismissViewControllerAnimated(true, completion: nil)
        photoImageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
    }

    func imagePickerControllerDidCancel(picker: UIImagePickerController) {
        dismissViewControllerAnimated(true, completion: nil)
    }

@IBAction func addPicture(sender: AnyObject) {
    if(UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)) {
        imagePicker =  UIImagePickerController()
        imagePicker.delegate = self
        imagePicker.sourceType = .Camera

        presentViewController(imagePicker, animated: true, completion: nil)
    } else {
        imagePicker.allowsEditing = false
        imagePicker.sourceType = .PhotoLibrary
        imagePicker.delegate = self
        presentViewController(imagePicker, animated: true, completion:nil)
    }
}
}
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