重新加载 ViewController 中的 tableview 让我在索引路径的 cellforRow 中出现“致命错误：索引超出范围”
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【中文标题】重新加载 ViewController 中的 tableview 让我在索引路径的 cellforRow 中出现“致命错误：索引超出范围”【英文标题】：Reloading the tableview inside a ViewController getting me ' Fatal error: index out of range' , in cellforRow at index path 【发布时间】：2019-04-23 06:45:50 【问题描述】：当我打开视图时，它会快速打开并且不显示任何错误，但是当我重新打开它时，它会给我“致命错误”。这是 ViewController 中的一个表格视图，它正在获取数据，但是当我重新打开视图时它会出错。
当我再次调用 tableview 时，tableview 嵌入在视图控制器中，它在 ViewController 内给出了超出范围的致命错误索引。这需要解决我认为问题在于我在返回数组的部分中的行数。
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()
【问题讨论】：
【参考方案1】：它给出了错误，因为这些行保存在本地但我再次调用数据更改是：
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()
【讨论】：
【参考方案2】：我认为 self.tableView.dataSource = self & self.tableView.delegate = self 应该在 viewDidLoad 方法中。将其添加到 viewDidLoad 可能会起作用。
【讨论】：
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