这是购物应用程序，用户选择了产品后发送到购物车，然后在填写字段后结账，然后按Checkout（付款）将产品的详细信息发送到我的Firebase数据库，请任何人可以帮助我将json用作加载产品在表格单元格上
我知道我没有付款服务，但是在此付款信息字段上将显示姓名，电话号码和位置
[{
"name": "EGG",
"price": "3.00",
"image": "http://partiklezoo.com/Egg/u0001.jpg",
"description": "one Egg",
"category": "Food",
"uid": "u0001"
},]
代码
import UIKit
class CheckoutViewController: DetailViewController, UITableViewDataSource, UITableViewDelegate, UIPickerViewDataSource, UIPickerViewDelegate {
@IBOutlet var cardNumber: UITextField!
@IBOutlet var cardExpiryMonth: UITextField!
@IBOutlet var cardExpiryYear: UITextField!
@IBOutlet var cardCvv: UITextField!
@IBOutlet var pickerPickupPoint: UIPickerView!
@IBOutlet var tableViewOrderDetails: UITableView!
@IBOutlet var labelTotalPrice: UILabel!
var model = SingletonManager.model
override func viewDidLoad() {
super.viewDidLoad()
self.configureCheckout()
self.tableViewOrderDetails.dataSource = self
self.tableViewOrderDetails.delegate = self
self.pickerPickupPoint.dataSource = self
self.pickerPickupPoint.delegate = self
//Looks for single or multiple taps.
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(CheckoutViewController.dismissKeyboard))
view.addGestureRecognizer(tap)
}
@objc func dismissKeyboard() {
//Causes the view (or one of its embedded text fields) to resign the first responder status.
self.view.endEditing(true)
}
func configureCheckout() {
pickerPickupPoint.selectedRow(inComponent: 0)
labelTotalPrice.text = "$" + String(format: "%.2f", model.calculateCartTotal())
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return model.cart.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
cell.textLabel?.text = model.products[Int(model.cart[indexPath.row][0])].name
cell.detailTextLabel?.text = String(Int(model.cart[indexPath.row][1])) + " x $" + String(format: "%.2f", model.cart[indexPath.row][4])
return cell
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return model.pickUpLocations.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return model.pickUpLocations[row]["street"]! + ", " + model.pickUpLocations[row]["suburb"]!
}
@IBAction func payNow(_ sender: Any) {
var error = ""
if self.model.cart.count == 0 {
error = "Your cart is empty."
}
else if (self.cardNumber.text?.isEmpty)! {
error = "Please enter your card number."
}
else if (self.cardExpiryMonth.text?.isEmpty)! {
error = "Please enter the expiry month of your card."
}
else if (self.cardExpiryYear.text?.isEmpty)! {
error = "Please enter the expiry year of your card."
}
else if (self.cardCvv.text?.isEmpty)!{
error = "Please enter the CVV number of your card."
}
if error.isEmpty {
showAlertMsg("Confirm Purchase", message: "Pay " + labelTotalPrice.text!, style: UIAlertControllerStyle.actionSheet)
}
else {
showAlertMsg("Error", message: error, style: UIAlertControllerStyle.alert)
}
}
var alertController: UIAlertController?
func showAlertMsg(_ title: String, message: String, style: UIAlertControllerStyle) {
self.alertController = UIAlertController(title: title, message: message, preferredStyle: style)
if style == UIAlertControllerStyle.actionSheet {
alertController?.addAction(UIAlertAction(title: "Pay", style: .default, handler: { _ in
self.checkout()
}))
alertController?.addAction(UIAlertAction(title: "Cancel", style: .cancel))
} else {
alertController?.addAction(UIAlertAction(title: "Okay", style: .default))
}
self.present(self.alertController!, animated: true, completion: nil)
}
func checkout() {
var success = true
for count in 0...self.model.cart.count - 1 {
let product = self.model.products[Int(self.model.cart[count][0])]
let quantity = Int(self.model.cart[count][1])
let total = self.model.cart[count][4]
let material = self.model.cart[count][3] == 0.0 ? "pla" : "abs"
let painting = self.model.cart[count][2] == 0.0 ? "false" : "true"
let temp = self.model.purchase(product: product, quantity: quantity, total: total, material: material, painting: painting)
if !temp {
success = false
}
}
if !success {
let error = "Oops! Something went wrong. Please try again later."
showAlertMsg("Error", message: error, style: UIAlertControllerStyle.alert)
} else {
print("Success! Checkout complete.")
self.cardNumber.text = ""
self.cardExpiryMonth.text = ""
self.cardExpiryYear.text = ""
self.cardCvv.text = ""
self.labelTotalPrice.text = "$0.00"
self.model.clearCart()
self.tableViewOrderDetails.reloadData()
self.performSegue(withIdentifier: "Thankyou", sender: self)
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let confirmationVc = (segue.destination as! UINavigationController).topViewController as! ConfirmationViewController
confirmationVc.location = self.model.pickUpLocations[self.pickerPickupPoint.selectedRow(inComponent: 0)]
}
}
这是我的目标
Class Model: NSObject, CLLocationManagerDelegate {
var segueArray = [String]()
var seguesDictionary = Dictionary<String, UIImage>()
var products = [Product]()
var storedProducts = [NSManagedObject]()
var cart = [[Double]]()
var storedCart = [NSManagedObject]()
var pickUpLocations = [[String: String]]()
let locationManager = CLLocationManager()
override init() {
super.init()
segueArray.append("Home")
segueArray.append("List")
segueArray.append("Search")
segueArray.append("Cart")
segueArray.append("Finder")
segueArray.append("Checkout")
seguesDictionary["Home"] = UIImage(named: "home")
seguesDictionary["List"] = UIImage(named: "list")
seguesDictionary["Search"] = UIImage(named: "search")
seguesDictionary["Cart"] = UIImage(named: "cart")
seguesDictionary["Finder"] = UIImage(named: "finder")
seguesDictionary["Checkout"] = UIImage(named: "checkout")
self.loadProducts()
self.refreshProducts()
self.loadCart()
self.configureLocManager()
}
func loadProducts() {
let managedContext = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "Products")
do {
let results = try managedContext.fetch(fetchRequest)
storedProducts = results as! [NSManagedObject]
if storedProducts.count > 0 {
for index in 0...storedProducts.count - 1 {
let binaryData = storedProducts[index].value(forKey: "image") as! Data
let image = UIImage(data: binaryData)
let name = storedProducts[index].value(forKey: "name") as! String
let price = storedProducts[index].value(forKey: "price") as! Double
let details = storedProducts[index].value(forKey: "details") as! String
let category = storedProducts[index].value(forKey: "category") as! String
let uid = storedProducts[index].value(forKey: "uid") as! String
let loadedProduct = Product(name: name, price: price, image: image!, details: details, category: category, uid: uid)
products.append(loadedProduct)
}
}
}
catch let error as NSError
{
print("Could not load. \(error), \(error.userInfo)")
}
}
func refreshProducts() {
let url = NSURL(string: "http://partiklezoo.com/3dprinting/")
let config = URLSessionConfiguration.default
config.isDiscretionary = true
let session = URLSession(configuration: config)
let task = session.dataTask(with: url! as URL, completionHandler:
{(data, response, error) in
let json = JSON(data: data!)
for count in 0...json.count - 1
{
let newProduct = Product()
newProduct.name = json[count]["name"].string
newProduct.price = Double(json[count]["price"].string!)
newProduct.details = json[count]["description"].string
newProduct.category = json[count]["category"].string
newProduct.uid = json[count]["uid"].string
let imgURL = json[count]["image"].string!
self.addItemToList(newProduct, imageURL: imgURL)
}
})
task.resume()
}
func checkForProduct(_ searchItem: Product) -> Int {
var targetIndex = -1
if products.count > 0 {
for index in 0...products.count - 1 {
if products[index].uid == searchItem.uid {
targetIndex = index
}
}
}
return targetIndex
}
func addItemToList(_ newProduct: Product!, imageURL: String) {
if checkForProduct(newProduct) == -1 {
let managedContext = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
let picture = UIImageJPEGRepresentation(loadImage(imageURL), 1)
let entity = NSEntityDescription.entity(forEntityName: "Products", in: managedContext)
let productToAdd = NSManagedObject(entity: entity!, insertInto: managedContext)
productToAdd.setValue(newProduct.category, forKey: "category")
productToAdd.setValue(newProduct.details, forKey: "details")
productToAdd.setValue(picture, forKey: "image")
productToAdd.setValue(newProduct.name, forKey: "name")
productToAdd.setValue(newProduct.price, forKey: "price")
productToAdd.setValue(newProduct.uid, forKey: "uid")
do
{
try managedContext.save()
}
catch let error as NSError
{
print("Could not save. \(error), \(error.userInfo)")
}
storedProducts.append(productToAdd)
newProduct.image = UIImage(data: picture!)
products.append(newProduct)
}
}
func loadCart() {
let managedContext = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "Cart")
do {
let results = try managedContext.fetch(fetchRequest)
storedCart = results as! [NSManagedObject]
if storedCart.count > 0 {
for index in 0...storedCart.count - 1 {
let product = storedCart[index].value(forKey: "product") as! Double
let quantity = storedCart[index].value(forKey: "quantity") as! Double
let finish = storedCart[index].value(forKey: "finish") as! Double
let material = storedCart[index].value(forKey: "material") as! Double
let totalPrice = storedCart[index].value(forKey: "total") as! Double
let temp = [product, quantity, finish, material, totalPrice]
cart.append(temp)
}
}
}
catch let error as NSError
{
print("Could not load. \(error), \(error.userInfo)")
}
}
func addToCart(product: Product, quantity: Double, finish: Double, material: Double, totalPrice: Double) {
let managedContext = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: "Cart", in: managedContext)
let productToAdd = NSManagedObject(entity: entity!, insertInto: managedContext)
productToAdd.setValue(checkForProduct(product), forKey: "product")
productToAdd.setValue(quantity, forKey: "quantity")
productToAdd.setValue(finish, forKey: "finish")
productToAdd.setValue(material, forKey: "material")
productToAdd.setValue(totalPrice, forKey: "total")
do
{
try managedContext.save()
}
catch let error as NSError
{
print("Could not save. \(error), \(error.userInfo)")
}
let temp = [Double(checkForProduct(product)), quantity, finish, material, totalPrice]
storedCart.append(productToAdd)
cart.append(temp)
}
答案 0 :(得分：0)
我不确定我是否理解问题，但是从注释中我认为OP正在要求将示例代码放入操作按钮中，以将日期写入Firebase。所以就在这里。
（注意：请参见评论，因为OP并没有澄清他的要求，因此尚不清楚这是否是答案）
从在视图控制器中初始化Firebase开始
class ViewController: UIViewController {
var ref: DatabaseReference!
override func viewDidLoad() {
super.viewDidLoad()
self.ref = Database.database().reference()
然后按下按钮，将两个汽车写入“ car_list”节点中的火力发源地
@IBAction func button0Action(_ sender: Any) {
let itemDict0 = [
"Name": "Car",
"price": "2000"]
let itemDict1 = [
"Name": "Car",
"price": "3000"]
let carRef = self.ref.child("car_list")
carRef.childByAutoId().setValue(itemDict0)
carRef.childByAutoId().setValue(itemDict1)
}
Firebase中的结果如下所示：
car_list
-LKYuRKpLL_JXsDGsYWY
Name: "Car"
Price: "2000"
-LKYuRKpLL_JXsDGsYWZ
Name: "Car"
Price: "3000"
编辑：我最初根据问题中的数据将其设置为购物清单，但根据OP的评论，他们希望将其设为汽车和价格，所以现在就是这样。