刷新UItableview

Question

订单存储为Order个对象：let orders = [Order]()

我的想法是每秒调用我的API，当创建新单元格时，表格应显示新单元格。

        var timer = Timer.scheduledTimer(timeInterval: 0.4, target: self, selector: "GetOrders", userInfo: nil, repeats: true)

这段代码确实刷新了我的函数以获取数据但重复了单元格!!

所以在GetOrders函数的开头我擦除了数组，然后用API中的新数组上传它。

func GetOrders (){

orders = []

但是当从数据库中删除新订单时代码会崩溃。它显示在表格中。当我点击它返回＆＃39;指数超出范围＆＃39;因为这个功能

 func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: true)
    let order =  orders[indexPath.row]
    guard orders.count > indexPath.row else {
        print("Index out of range")
        return
    }

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    var viewController = storyboard.instantiateViewController(withIdentifier: "viewControllerIdentifer") as! OrderDetailsController
    viewController.passedValue = order.id
    self.present(viewController, animated: true , completion: nil)



}

更新

func GetOrders (){

    orders = []
    print("hi")

    let urlStr = "api/orders"
    let url = URL(string: urlStr)


    let user = "api"
    let password = "Apipass"



    var headers: HTTPHeaders = [
        "Authorization": "Basic YXBpdXNlcjpBcGlBdXRoUGFzczIwMTchQCM="
    ]


    Alamofire.request(url!, method: .get ,encoding: URLEncoding.default, headers: headers).responseJSON { response in

        if let value: AnyObject = response.result.value as AnyObject? {
            //Handle the results as JSON
            let data = JSON(value)


            for (key,subJson):(String, JSON) in  data[0] {
                //Do something you want



                let logo = subJson["family"]["logo"]

                let logoString = "img/\(logo)"



                if let  date = subJson["family"]["updated_at"].string {
                    print(date)
                    if let cleintName = subJson["client"]["name"].string {



                                                    let info = Order(shopname: shopname, shopaddress: shopaddr, clientName: cleintName, ClientAddress: clientAddres, PerferTime: time, Cost: subtotal , date : time , Logo : logoString ,id : id)



                                                    self.orders.append(info)


                                                }

                                                self.tableview.reloadData()

                                            }

                                        }

Answer 1

您是否尝试过使用主线程？

DispatchQueue.main.async {
    self.tableView.reloadData()
}