我从选择器中选择值，它在表格中显示值。但是我从选择器中选择了第二个值，它显示了之前的值和新值。但我只想要新的价值观。请查看我的下图。
类ViewController：UIViewController，UIPickerViewDelegate，UIPickerViewDataSource，UITableViewDataSource，UITableViewDelegate { @IBOutlet弱var tableView：UITableView！
@IBOutlet weak var customPicker: UIPickerView!
var pickerDataSource = ["SelectOne","First","Second","Third"];
var m = ""
var wln = [AnyObject]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
customPicker.delegate=self
customPicker.dataSource = self
tableView.backgroundColor = UIColor(red:239 / 255, green: 242 / 255, blue: 247 / 255, alpha: 1)
tableView.separatorColor = UIColor.clear
tableView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return wln.count
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerDataSource.count;
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return pickerDataSource[row] as String
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
m = pickerDataSource[row]
tableView.reloadData()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell:TableViewCell! = tableView.dequeueReusableCell(withIdentifier: "cell") as! TableViewCell
print("dd\(self.wln)")
cell.lbl.text = self.wln[indexPath.row] as? String
return cell as TableViewCell
}
@IBAction func get(_ sender: Any) {
print("\(m)")
if(m == "") {
}else if(m == "First") {
m = "background"
DispatchQueue.main.async {
self.tableView.reloadData()
self.viewDidLoad()
}
}
else if(m == "Second") {
print("drugTest")
m = "drugTest"
DispatchQueue.main.async {
self.tableView.reloadData()
self.viewDidLoad()
}
} else if(m == "Third") {
print("Other Details")
m = "otherDetails"
DispatchQueue.main.async {
self.tableView.reloadData()
self.viewDidLoad()
}
}
print("Ggg\(m)")
let paramaters = [ "Id":"300724","Type":m]
let url = URL(string: "http://-------")
//create the session object
let session = URLSession.shared
//now create the URLRequest object using the url object
var request = URLRequest(url: url!)
request.httpMethod = "POST" //set http method as POST
do {
request.httpBody = try JSONSerialization.data(withJSONObject: paramaters, options: .prettyPrinted) // pass dictionary to nsdata object and set it as request body
} catch let error {
print(error.localizedDescription)
}
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
//create dataTask using the session object to send data to the server
let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
guard error == nil else {
return
}
guard let data = data else {
return
}
do {
let httpResponse = response as? HTTPURLResponse
print(httpResponse)
let myV = httpResponse?.statusCode
if myV == 200{
if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? Array<AnyObject> {
DispatchQueue.main.async {
for item in json{
if let img1 = item["Name"] as? AnyObject {
self.wln.append(img1)
DispatchQueue.main.async {
self.tableView.reloadData()
self.viewDidLoad()
}
}
}
}
}
}
} catch let error {
print(error.localizedDescription)
}
})
task.resume()
}
}