当我打开视图时，它会快速打开并且没有显示任何错误，但是当我重新打开它时，它会给我“致命错误”。这是ViewController内部的一个tableview，它正在向我获取数据，但是当我重新打开视图时，它会显示错误。
当我再次调用tableview时，tableview嵌入在视图控制器中，它在ViewController内部提供致命错误索引，超出范围。这需要解决，我认为问题在于返回数组的部分的行数。
import UIKit
import Alamofire
import Foundation
protocol Quantitypass {
func qtypass(qty: String, product_id: String)
}
public struct QtyCart {
var qty : String!
public init(qty: String) {
self.qty = qty
}
}
public struct FavouriteCart {
var p_name : String!
var p_price : String!
var p_id : String!
var qty: String!
public init(p_name: String , p_price: String , p_id : String, qty: String) {
self.p_name = p_name
self.p_price = p_price
self.p_id = p_id
self.qty = qty
}
}
public struct favSection {
var favitems: [FavouriteCart]
public init(favitems: [FavouriteCart] ) {
self.favitems = favitems
}
}
public struct MyVariables {
static var product2 = "p_id"
}
public var cartData: [favSection] = []
class newCartViewController: UIViewController {
@IBAction func btnSubmit(_ sender: UIButton) {
self.loadnextVC()
}
func loadnextVC() {
let storyBoard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let newViewController = storyBoard.instantiateViewController(withIdentifier: "finalVC")
self.present(newViewController, animated: true, completion: nil)
}
@IBOutlet weak var lblPreorder: UILabel!
@IBOutlet weak var lblOrdermethod: UILabel!
@IBOutlet weak var lblTotalAmount: UILabel!
// public var itemsData: [Item] = []
var lblOrder = String()
// let productPrice = UserDefaults.standard.object(forKey: "p_price")
let cartid = UserDefaults.standard.object(forKey: "deviceUUID") as? String
let getApi = RestaurantAPI.self
var qtyData: [QtyCart] = []
// var currentSection = 0
// var currentRow = 1
// var calculation1 = cartTableViewCell()
@IBOutlet weak var tableView: UITableView!
@IBAction func dismiss(_ sender: Any) {
self.dismiss(animated: true, completion: nil)
self.lblTotalAmount.text = ""
}
//public var cartData: [FavouriteCart] = []
var refreshControl = UIRefreshControl()
var buttonClicked = statusViewController.self
var btn2 = UserDefaults.standard.object(forKey:"button1") as? Bool
var btn3: Bool = true
weak var delegate: DetailsDelegate?
override func viewDidLoad() {
super.viewDidLoad()
self.getTotal1()
print("@------/\(cartData.count)")
//self.updateLabel(withString: lblTotalAmount.text)
if btn2 != btn3 {
lblPreorder.isHidden = true
lblOrdermethod.isHidden = false
print("BUTTONCLICKED")
UserDefaults.standard.removeObject(forKey: "button1")
} else if btn2 == btn3 {
lblPreorder.isHidden = false
lblOrdermethod.isHidden = true
print("BUTTON-NOT-CLICKED")
UserDefaults.standard.removeObject(forKey: "button1")
}
// if #available(iOS 10.0, *) {
// tableView.refreshControl = refreshControl
// } else {
// tableView.addSubview(refreshControl)
//
// }
// self.refreshControl.attributedTitle = NSAttributedString(string: "Pull to refresh")
// self.refreshControl.addTarget(self, action: #selector(newCartViewController.refreshData), for: UIControlEvents.valueChanged)
//
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.view.addSubview(self.tableView)
self.tableView.dataSource = self
self.tableView.delegate = self
self.getTotal1()
self.getFav()
self.tableView.reloadData()
// self.updateTableview()
// self.getTotal1()
}
func getFav() {
getFav(completionHandler: { success in
if success {
DispatchQueue.main.async{
self.tableView.reloadData()
}
}
})
}
//TOTAL API CALL:
func getTotal1() {
if cartid != nil {
let request = getApi.getamountcartGetWithRequestBuilder(restId: "17", cartId: cartid!)
Alamofire.request(request.URLString, method: .get , parameters: nil, encoding: JSONEncoding.default)
.responseJSON { response in
print("123321#######/\(response)")
let res = response
print("101res/\(res)")
if let value = response.value as? [String: AnyObject] {
if let success = value["error"] as? Bool {
if success == false {
// var grandtotal: Any? = value["total"]
if let grandtotal = value["total"] as? Double {
self.lblTotalAmount.text = String(grandtotal)
print("!@/\(String(grandtotal))")
var g = String(grandtotal)
UserDefaults.standard.set(g, forKey: "g")
}
// self.tableView.reloadData()
}
}
}
}
}
}
//
// Mark: getting all cart items:-->
func getFav(completionHandler: @escaping (Bool) -> Void){
if cartid != nil {
let request = getApi.displaycartGetWithRequestBuilder(restId: "17", cartId:cartid!)
Alamofire.request(request.URLString, method: .get , parameters: nil, encoding: JSONEncoding.default)
.responseJSON { response in
print("123321/\(response)")
let res = response
print("101res/\(res)")
// let total = cartData
// print("cartd1/\(total)")
if let value = response.value as? [String: AnyObject] {
if let success = value["error"] as? Bool {
if success == false {
print("2222/\(response)")
if let response = value["cartdata"] as? [String: AnyObject] {
let cart = response["simple"] as! [[String: AnyObject]]
// let total = value["total"] as! [String: Any]
// print("1231231231234/\(total)")
//let userdata: [Favourites] = []
//
var cartitems: [FavouriteCart] = []
for (_ , value) in cart.enumerated() {
let obj = value
let p_name = obj["p_name"] as! String
let p_price = obj["p_price"] as! String
let p_id = obj["p_id"] as! String
let qty = obj["qty"] as! String
// UserDefaults.standard.set(qty, forKey: "qty")
let item = FavouriteCart(p_name: p_name, p_price: p_price, p_id: p_id, qty: qty)
cartitems.append(item)
DispatchQueue.main.async{
print("RELOADED-----ON-----API")
cartData.append(favSection(favitems: cartitems))
self.tableView.reloadData()
}
}
}
print("COMPLETION-------------HANDLER")
completionHandler(true)
}
}
else
{
let myAlert = UIAlertController(title:"Alert",message:value["error_msg"] as? String,preferredStyle:UIAlertControllerStyle.alert)
let okAction = UIAlertAction(title:"OK",style:UIAlertActionStyle.default , handler: nil)
myAlert.addAction(okAction)
}
}
}
}
}
// Mark:--> Delete items from cart.
// func delFav(p_id: String ,completionHandler: @escaping (Bool) -> Void) {
func delFav(p_id: String, completionHandler: @escaping (Bool) -> Void){
//var product1 = UserDefaults.standard.object(forKey: "p_id")
//print("this is my \(product1)")
let request = getApi.deleteproductcartGetWithRequestBuilder(restId: "17", cartId: cartid!, productId: p_id , freeDish: "none", type: "simple")
Alamofire.request(request.URLString, method: .delete , parameters: nil, encoding: JSONEncoding.default)
.responseJSON { response in
print("del favvvvvvvvv\(response)")
print("<<DELETED ------------ ITEM>>")
//print(response)
if let value = response.value as? [String: AnyObject] {
if let success = value["error"] as? Bool {
if success == false {
let response = value["cartdata"] as? [String]
print("10001 - > /\(response)")
//self.tableView.reloadData()
} else
{
print("error message")
}
}
}
// completionHandler(true)
}
}
func delterow(p_id: String) {
self.delFav(p_id: p_id, completionHandler: {sucess in
if sucess {
self.tableView.reloadData()
print("DELETED_ITEM")
}
})
}
func updateTotal(withString string: String?) {
lblTotalAmount.text = string
}
}
extension newCartViewController: UITableViewDelegate , UITableViewDataSource {
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 90;
}
// func numberOfSections(in tableView: UITableView) -> Int {
// return cartData.count
// }
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// return sectionsData[section].items.count
// return cartData[section].favitems.count
// return cartData[section]..count
return cartData.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cartTablecell", for: indexPath) as! cartTableViewCell
let item: FavouriteCart = cartData[indexPath.section].favitems[indexPath.row]
cell.btnsub1.tag = indexPath.row
cell.btnadd1.tag = indexPath.row
cell.lblItemName.text = item.p_name
cell.productPrice.text = item.p_price
cell.lblprice.text = item.p_price
cell.lblQuantity.text = item.qty
return cell
}
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool{
return true
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if (editingStyle == .delete) {
if cartData.isEmpty{
print("EmptyCart")
}else {
print("0-0/\(cartData.count)")
// let item: Item = sectionsData[indexPath.section].items[indexPath.row]
let item: FavouriteCart = cartData[indexPath.section].favitems[indexPath.row]
self.tableView.beginUpdates()
cartData.remove(at: indexPath.row)
self.tableView.deleteRows(at: [indexPath], with: .fade)
self.delterow(p_id: item.p_id)
self.getTotal1()
self.tableView.endUpdates()
}
}
}
}
答案 0 :(得分：0)
出现错误是因为行保存在本地，但是我再次调用数据时更改为：
关闭视图时必须删除整个购物车
@IBAction func dismiss(_ sender: Any) {
self.dismiss(animated: true, completion: nil)
self.lblTotalAmount.text = ""
cartData.removeAll()
}
答案 1 :(得分：0)
我认为 self.tableView.dataSource = self和self.tableView.delegate = self 应该在viewDidLoad方法中。将其添加到viewDidLoad可能有用。