此代码假设从 JSON 对象获取数据然后用它更新表的行，所以我使用了 (tableView.reloaddata) 但它不起作用。
class history: UIViewController,UITableViewDataSource,UITableViewDelegate {
var rec = [recs]()
var delegate2 : historyViewControllerProtocol!
var ID2 = [String]()
var Amount2 = [String]()
var Desc2 = [String]()
var records:String = ""
@IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
reciptshistory(){ (boolValue) -> () in
self.Loaddata()
self.tableView.reloadData()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func reciptshistory(completion: @escaping (_ result: Bool)->())
{
var Buffer : String
Buffer = "userID=" + userID
print("intial///////////////////" + Buffer + "//////////////End")
let url:NSURL = NSURL(string: "http://nh75.com.kw/old-soon/Paynet/recipthistory.php")!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url as URL)
request.httpMethod = "POST"
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
let data = Buffer.data(using: String.Encoding.utf8)
let task = session.uploadTask(with: request as URLRequest, from: data, completionHandler:
{(data,response,error) in
guard let _:NSData = data as NSData?, let _:URLResponse = response, error == nil else {
print("error")
return
}
let dataString = String(data: data!, encoding: String.Encoding(rawValue: String.Encoding.utf8.rawValue))
print(dataString as Any)
self.records = dataString!;
if(self.records == "X")
{
print("No records");
completion (true)
} else {
print (dataString! )
do {
// let data = dataString?.data(using: .utf8)
let json = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as! [String:AnyObject]
if let result = json["result"] as? [[String: AnyObject]] {
for blog in result {
if let iD = blog["id"] as? String {
if let amount = blog["Amount"] as? String {
if let desc = blog["Desc"] as? String {
self.ID2.append(iD)
self.Amount2.append(amount)
self.Desc2.append(desc)
//recipt.text = self.ID
//print(ID , Amount , Desc)
}
}
}
}
completion (true)
}
}catch {
print("error serializing JSON: \(error)")
}
}
}
);
task.resume()
}
func Loaddata()
{
DispatchQueue.main.async {
if(self.records == "X")
{
let alert = UIAlertController(
title: "No Records found",
message: "No records found for you",
preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.default, handler: { (test) -> Void in
self.dismiss(animated: true, completion: nil)
}))
self.present(
alert,
animated: true,
completion: nil)
}else{
for L in 0..<self.ID2.count{
self.rec += [recs(reciptsnum: self.ID2[L] , amount:self.Amount2[L] , descript: self.Desc2[L])!]
}
}
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return rec.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// Table view cells are reused and should be dequeued using a cell identifier.
let cellIdentifier = "RecTableViewCell"
let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as! RecTableViewCell
// Fetches the appropriate meal for the data source layout.
let recc = rec[(indexPath as NSIndexPath).row]
cell.reciptnum.text = recc.reciptsnum
cell.Amount.text = recc.amount
cell.descript.text = recc.descript
return cell
}
每次我运行应用程序时，自定义表格 View 都是空的，请建议... here is a screenshot of the app running
最佳答案
在我看来，您的 Controller 没有作为委托(delegate)和数据源连接到您的表。如果您在 Storyboard中将其设置为“UITableViewController”而不是“UIViewController”(并将“history”子类为 UITableViewController)，它应该会自动连接。
您还可以在代码中连接:
tableView.delegate=self tableView.datasource=self
但是您可能仍然需要子类化为 UITableViewController 而不是 UIViewController。
关于ios - 自定义 TableView 永不更新，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43612941/