这是我使用notificationcenter和tableview.reloaddata（）在自定义表视图单元格上单击删除按钮时用来刷新表视图的代码。我搜索了很多其他代码，我认为我的代码看起来不错。我不知道为什么它就是不刷新。
这就是我的表视图所在的
override func viewDidLoad() {
super.viewDidLoad()
username = tempUser.username
self.resultSearchController = ({
let controller = UISearchController(searchResultsController: nil)
controller.searchResultsUpdater = self
controller.dimsBackgroundDuringPresentation = false
controller.searchBar.sizeToFit()
self.tableView.tableHeaderView = controller.searchBar
return controller
})()
get{(value) in
self.values = value
for ele in self.values{
if self.username != ele["username"] as! String{
}
}
}
self.tableView.reloadData()
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(serviceBoard.methodhandlingTheNotificationEvent), name:"NotificationIdentifier", object: nil)
}
func methodhandlingTheNotificationEvent(){
tableView.reloadData()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if (self.resultSearchController.active && resultSearchController.searchBar.text != "") {
return self.filteredTableData.count
}
else {
return values.count
}
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as!postCell
let maindata = values[values.count-1-indexPath.row]
if (self.resultSearchController.active && resultSearchController.searchBar.text != "") {
// if (filteredTableData[indexPath.row].rangeOfString("###") == nil){
cell.postImg.image = UIImage(named:"tile_services")
cell.title.text = filteredTableData[indexPath.row]
cell.category.text = "SERVICES"
var price = String()
for i in values{
if (i["title"] as? String)! == filteredTableData[indexPath.row]{
price = (i["price"] as? String)!
cell.categories = "Services"
cell.username = i["username"] as! String
cell.prices = i["price"] as! String
cell.notes = i["notes"] as! String
cell.school = i["school"] as! String
}
}
cell.price.text = price
return cell
}
else {
if maindata["username"] as! String != username && username != "admin"{
cell.deleteBtn.hidden = true
}
else{
cell.categories = "Services"
cell.username = maindata["username"] as! String
cell.prices = maindata["price"] as! String
cell.notes = maindata["notes"] as! String
cell.school = maindata["school"] as! String
}
cell.postImg.image = UIImage(named:"tile_services")
cell.title.text = maindata["title"] as? String
cell.category.text = "SERVICES"
cell.price.text = maindata["price"] as? String
return cell
}
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let popOverVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("showPostT") as! showPostT
self.addChildViewController(popOverVC)
popOverVC.view.frame = self.view.frame
self.view.addSubview(popOverVC.view)
popOverVC.didMoveToParentViewController(self)
if (self.resultSearchController.active && resultSearchController.searchBar.text != "") {
for i in values{
if (i["title"] as? String)! == filteredTableData[indexPath.row]{
popOverVC.type.text = "SERVICE"
popOverVC.typeImg.image = UIImage(named:"tile_services")
popOverVC.item.text = "Service: (i["title"] as! String)"
popOverVC.price.text = "Price: (i["price"] as! String)"
popOverVC.notes.text = "Notes: (i["notes"] as! String)"
popOverVC.comments.text = i["comments"] as? String
popOverVC.postUser.text = i["username"] as! String
popOverVC.notesStr = i["notes"] as! String
popOverVC.category = "service"
popOverVC.pricesStr = i["price"] as! String
if username == popOverVC.postUser.text!{
popOverVC.composeBtn.hidden = true
}
}
}
}
else{
let maindata = values[values.count-1-indexPath.row]
popOverVC.type.text = "SERVICE"
popOverVC.typeImg.image = UIImage(named:"tile_services")
popOverVC.item.text = "Service: (maindata["title"] as! String)"
popOverVC.price.text = "Price: (maindata["price"] as! String)"
popOverVC.notes.text = "Notes: (maindata["notes"] as! String)"
popOverVC.comments.text = maindata["comments"] as? String
popOverVC.postUser.text = maindata["username"] as! String
popOverVC.notesStr = maindata["notes"] as! String
popOverVC.category = "service"
popOverVC.pricesStr = maindata["price"] as! String
if username == popOverVC.postUser.text!{
popOverVC.composeBtn.hidden = true
}
}
}
这是我的自定义表视图单元格
class postCell: UITableViewCell{
@IBOutlet weak var deleteBtn: UIButton!
@IBOutlet weak var postImg: UIImageView!
@IBOutlet weak var category: UILabel!
@IBOutlet weak var location: UILabel!
@IBOutlet weak var title: UILabel!
@IBOutlet weak var price: UILabel!
var prices = String()
var notes = String()
var comments = String()
var locations = String()
var categories = String()
var school = String()
var username = String()
var date = String()
@IBAction func deleteAction(sender: AnyObject) {
let request = NSMutableURLRequest(URL: NSURL(string: "http://www.percyteng.com/orbit/deletePost.php")!)
request.HTTPMethod = "POST"
let postString = "name=(username)&location=(locations)&price=(prices)¬es=(notes)&school=(school)&category=(categories)"
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
data, response, error in
if error != nil {
print("error=(error)")
return
}
print("response = (response)")
let responseString = NSString(data: data!, encoding: NSUTF8StringEncoding)
print("responseString = (responseString)")
}
task.resume(); NSNotificationCenter.defaultCenter().postNotificationName("NotificationIdentifier", object: nil)
}
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated:animated)
}
}
单击"删除"按钮时，似乎没有更新values属性。
func methodhandlingTheNotificationEvent(){
// you have to update the `values` array so that it doesn't contain the value you've just removed.
tableView.reloadData()
}
尝试在viewDidAppear（）中重新加载表。
在重新加载tableview之前，您必须更新数据源，然后只有您的表视图会受到影响，否则您将始终得到旧表。
我认为maindata是您的cellforrowAtIndexpath中的主要数据源。因此，您必须从数据源中更新或删除数据，然后再重新加载数据。