在快速IOS中删除或更新一行数据时，如何将新数据重新加载到UITable中？

时间：2018-08-13 05:57:23

标签： ios swift uitableview

因此，对于我来说，我有一个UITableView，其中显示了从本地localhost数据库获取的注释，当用户发布注释时，它将发送到localhost并存储在本地，同时我重新加载表并显示注释这是时间，但是当用户删除注释或更新注释时，则实际上在数据库中删除或更新了数据，但是直到关闭视图并再次打开它时，我的tableview才重新加载新数据。 以下是我的代码。 这是我的删除评论代码：

  @objc func deleteComment(){
   ProgressHUD.show("Wait Deleting", interaction: false)
    customView.removeFromSuperview()
    var commentArray : Dictionary<String, Any> = [:]
    commentArray["commentId"] = self.getCommentId
    let myUrl = URL(string: "http://127.0.0.1:8000/api/comment/delete");
    var request = URLRequest(url:myUrl!)
   request.httpMethod = "POST"// Compose a query string
   request.addValue("application/json", forHTTPHeaderField: "Content-type")
    guard let httpbody = try? JSONSerialization.data(withJSONObject: commentArray, options: []) else { return }
   request.httpBody = httpbody
    let task = URLSession.shared.dataTask(with: request) { (data: Data?, response: URLResponse?, error: Error?) in

        if error != nil
        {
            print("error=\(error)")
            return
        }
        // print out response object
        //  print("response = \(response)")
        //Let's convert response sent from a server side script to a NSDictionary object:
        do {
            let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary

            if let parseJSON = json {
                if parseJSON["delete"] != nil{
                    ProgressHUD.dismiss()
                    self.alertDeleted()

                }else {
                    if parseJSON["error"] != nil{
                        ProgressHUD.dismiss()
                        print(parseJSON["error"] as Any)

                    }
                }
            }
        } catch {
            print(error)
        }
    }
    task.resume()
}

这是删除评论警报。

 public func alertDeleted(){
    let alertController = UIAlertController(title: "Comment Deleted:",    message: "Press Ok to continue.", preferredStyle: .alert)

    let confirmAction = UIAlertAction(title: "Ok", style: .default) { (_) in
       self.showMatchCommentsApiCall()

    }
    alertController.addAction(confirmAction)
    self.present(alertController, animated: true, completion: nil)
}

这是更新注释代码。

 @objc func updateComment(){
    ProgressHUD.show("Wait Upating", interaction: false)
    updateCommentView.removeFromSuperview()
    var commentArray : Dictionary<String, Any> = [:]
    commentArray["commentId"] = self.getCommentId
    commentArray["updatedComment"] = textView.text
    let myUrl = URL(string: "http://127.0.0.1:8000/api/comment/update");
    var request = URLRequest(url:myUrl!)
    request.httpMethod = "POST"// Compose a query string
    request.addValue("application/json", forHTTPHeaderField: "Content-type")
    guard let httpbody = try? JSONSerialization.data(withJSONObject: commentArray, options: []) else { return }
    request.httpBody = httpbody
    let task = URLSession.shared.dataTask(with: request) { (data: Data?, response: URLResponse?, error: Error?) in

        if error != nil
        {
            print("error=\(error)")
            return
        }
        // print out response object
        //print("response = \(response)")
        //Let's convert response sent from a server side script to a NSDictionary object:
        do {
            let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary

            if let parseJSON = json {
                if parseJSON["update"] != nil{
                    ProgressHUD.dismiss()
                    self.alertCommentUpdated()
                    self.showMatchCommentsApiCall()
                    return
                }else {
                    if parseJSON["error"] != nil{
                        ProgressHUD.dismiss()
                        print(parseJSON["error"] as Any)

                    }
                }
            }
        } catch {
            print(error)
        }
    }
    task.resume()
}

我的ShowMatchCommentsApiCall()函数。

    public func showMatchCommentsApiCall(){
    ProgressHUD.show("Please Wait", interaction: false)
    guard let url = URL(string: "http://127.0.0.1:8000/api/matchComments/\(getMatchId)") else {return}
    let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
        guard let dataResponse = data,
            error == nil else {
                print(error?.localizedDescription ?? "Response Error")
                return }
        do{
            //here dataResponse received from a network request
            let jsonResponse = try JSONSerialization.jsonObject(with:
                dataResponse, options: [])
            // print(jsonResponse) //Response result
            guard let jsonArray = jsonResponse as? [[String: Any]] else {
                return
            }
            //print(jsonArray)
            for comments in jsonArray{

                guard let commentID = comments["commentId"] as? Int else { return }
                guard let userID    = comments["userId"] as? Int else { return }
                guard let userName  = comments["userName"] as? String else { return }
                let userImgUrl = comments["userImg"] as? String
                if userImgUrl != nil{
                    self.commentsUserImgUrl.append(userImgUrl!)
                }else {
                    self.commentsUserImgUrl.append("nil")
                }
                guard let commentMessage = comments["comment"] as? String else { return }
                self.commentId.append(commentID)
                self.commmentsUserId.append(userID)
                self.commentsUserName.append(userName)
                self.comments.append(commentMessage)

            }


        } catch let parsingError {
            print("Error", parsingError)
        }
        DispatchQueue.main.async {
            self.MatchScoreTable.reloadData()
            ProgressHUD.dismiss()
        }
    }

    task.resume()

}

2 个答案:

答案 0 :(得分：-1)

删除或更新数据后，只需调用UITableView方法reloadData

语法如下：

tableView.reloadData()

答案 1 :(得分：-1)

步骤1。：<svg version="1.1" id="svg2" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100%" height="100%" viewBox="0 0 1771.6535 1771.6535" style="enable-background:new 0 0 1771.6535 1771.6535;" xml:space="preserve"> <defs> <pattern id="img1" width="100" height="100" patternUnits="objectBoundingBox"> <image xlink:href="./Regions/Arbuzinka.png" x="-5%" y="-5%" width="30%" height="30%" /> </pattern> </defs> <a class="Arbuzinka" href="http://arbuzinkabib.tk"> <g inkscape:groupmode="layer" id="layer18" inkscape:label="Арбузинка" style="display:inline" transform="translate(0,719.29131)"> <path class="region" d="m 629.95741,-565.91816 -8.12988,-0.12207 -0.0732,5.44434 -6.5918,-0.19532 -0.34179,8.44727 -4.68754,-0.0244 -0.1709,6.03027 -2.417,5.46875 1.001,10.4248 1.3183,5.78614 2.6368,19.09179 -6.2989,3.24707 0.708,11.18164 -67.1374,30.41936 -0.5006,20.95771 5.9731,2.90024 0.086,0.0345 -2.7967,12.74035 -11.1862,15.28424 -3.1616,2.51465 -2.1179,3.76587 3.1298,3.97637 -2.2326,19.18647 8.5855,17.2133 6.2925,6.95713 4.7647,3.50446 6.2972,0.34025 5.5664,9.79005 5.1514,13.35449 3.7598,7.56836 1.1718,3.51562 3.125,3.90625 2.5391,4.29688 -0.1953,1.95312 -1.3672,3.32032 -1.1719,3.90625 -1.3672,2.73437 -2.539,2.92969 -1.7578,4.10156 -0.586,1.95313 1.3672,1.75781 3.125,1.75781 2.5391,1.5625 2.9297,0.78125 3.9062,0.58594 2.3438,0 3.7109,0.58594 2.3438,1.17187 3.3203,1.36719 3.5156,2.14844 2.3437,1.75781 1.7579,0.68359 1.6601,1.85547 1.2695,0.68359 -0.3906,2.63672 -0.5859,3.51563 -0.6836,1.36719 -0.293,2.14843 0.7813,1.17188 0.9765,1.75781 2.5606,6.38337 0.6215,1.38107 0.6215,1.86444 0.2762,1.9335 c 0,0 0.2762,0.69053 0.1381,0.96675 -0.1381,0.27621 -0.5524,1.93349 -0.5524,1.93349 l 0.069,1.31202 -0.8977,1.86444 c 0,0 -0.1381,1.24296 -0.2071,1.58823 -0.069,0.34526 0.069,1.51917 0.069,1.79538 0,0.27622 0.069,0.82864 0.069,1.24297 0,0.41432 -0.2072,1.86444 -0.2072,1.86444 l -0.1192,2.92068 0.293,1.36719 -0.4883,1.75781 0,0.87891 0,1.46484 0.293,1.07422 0.6836,0.78125 1.3672,1.36719 c 0,0 0.8789,1.17187 1.0742,1.5625 0.1953,0.39062 0.7812,0.78125 0.8789,1.46484 0.098,0.6836 0.098,1.17188 0.098,1.17188 0,0 0.098,0.19531 0.3906,0.78125 0.293,0.58593 0.6836,1.36718 0.6836,1.36718 l 0.098,0.48829 8.00789,-1.07422 27.83203,-7.22657 -0.87891,-8.00781 -2.24609,-8.10547 3.80859,-0.58593 -0.0977,-4.88282 5.95703,-2.24609 0.97656,- 4.98047 2.24609,-2.05078 2.83204,3.61328 12.98828,29.88281 6.83593,-1.46484 3.61329,-2.05078 20.50781,-3.71094 12.5,-3.71094 -1.75781,-16.11328 0.92773,-3.36914 20.70313,-1.95312 1.31835,7.61718 1.98143,5.99878 6.90529,-0.38354 11.42578,-2.88086 -3.72627,-19.28154 0.62148,-2.27876 6.90534,-1.0358 -3.93605,-25.3426 -1.45012,- 3.79793 -1.24296,-2.20971 2.48592,-1.45012 8.15516,-1.29299 4.58985,-0.73243 3.95508,-1.61132 0.73242,-1.07422 -0.87891,-5.07813 -2.24609,-7.91015 -16.37911,- 67.99604 -1.79539,-7.18155 -5.52427,-24.72112 -1.51917,-2.34781 -0.7098,-4.19881 -6.34765,0.14649 -1.07422,-1.12305 -1.31836,-11.18164 -7.66602,-2.7832 -3.18565,- 15.6627 0.69053,-2.62403 5.38617,-0.13811 -5.52428,-45.16092 2.62403,0.27621 0.82864,-0.82864 -1.60069,-14.76806 -4.29687,0.29297 0.39062,-18.65235 -3.22265,0 -4.10157,9.66797 -7.74675,9.71784 -14.95832,1.8056 -8.1543,4.66308 -1.46484,- 29.19921 -3.95508,-1.61133 -3.51563,0.75684 -32.32422,14.55077 -5.88379,1.00098 -0.78125,-0.0732 -0.63476,-0.43946 -0.53711,-0.63476 -1.87988,-4.3457 1.66015,- 2.70996 2.27051,0.39062 -4.69971,-19.86694 -2.47802,-3.32642 z" id="path3343" fill="url(#img1)" inkscape:connector-curvature="0" /> </g> </a>

第2步。：self.commentsArray.remove(at: indexPath.row)

第3步。：self.tableView.deleteRows(at:[indexPath],with:UITableViewRowAnimation.automatic)

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