tanvir
Reputation: 317
Update or reload UITableView after completion of delete action on detail view
I have a uitableview that collects data from mysql through json. Then it has a detail view that has two action edit and delete. Edit works fine. Delete action deletes mysql data but problem is it does not update data from uitableview.
Here is screen shot and code
//Table View Controller
import UIKit
class TableViewController: UITableViewController {
var storeList = [Store]()
//var storeList:Store?
override func viewDidLoad() {
super.viewDidLoad()
/*
if let s = storeList
{
txtName.text = s.storeName
}
*/
// Uncomment the following line to preserve selection between presentations
//self.clearsSelectionOnViewWillAppear = true
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
self.loadRecords()
self.tableView.reloadData()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.tableView.reloadData() // to reload selected cell
//tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return storeList.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
//let cell = tableView.dequeueReusableCellWithIdentifier("reuseIdentifier", forIndexPath: indexPath)
// Configure the cell...
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! StoreTVC
let s = storeList[indexPath.row] as Store
cell.lblName.text = s.storeName
//cell.lblID.text = s.storeId
return cell
}
// for swipe delete
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
storeList.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
/*
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
*/
/*
// Override to support editing the table view.
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
// Delete the row from the data source
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
} else if editingStyle == .Insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
override func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return false if you do not want the item to be re-orderable.
return true
}
*/
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
/*
if segue.identifier == "details"
{
//if let indexPath = tableView.indexPathForCell(sender as! UITableViewCell)
if let indexPath = tableView.indexPathForSelectedRow
{
let s = storeList[indexPath.row] as Store
let dvc = segue.destinationViewController as! ViewDetails
dvc.store = s
}
}
*/
if let indexPath = tableView.indexPathForCell(sender as! UITableViewCell)
{
let s = storeList[indexPath.row] as Store
let dvc = segue.destinationViewController as! ViewDetails
dvc.store = s
}
}
func loadRecords()
{
//The address of the web service
let urlString = "http://localhost/crud/read_for_table_view.php"
// 1 - Create the session by getting the configuration and then crrating the session
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config, delegate: nil, delegateQueue: nil)
//2 - Create the URL Object
if let url = NSURL(string: urlString)
{
//3 - Create the request object
let request = NSURLRequest(URL: url)
//4 - execute the request
let taskData = session.dataTaskWithRequest(request, completionHandler: {
(data: NSData?, response:NSURLResponse?, error: NSError?) -> Void in
//5 - Do something with the Data back
if(data != nil)
{
//we got some data back
print("\(data)")
/*
var parseError:NSError?
let parsedStores = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &parseError) as! NSDictionary
*/
do {
if let parsedStores = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary {
print("Json Data \n \(parsedStores)")
if let stores:AnyObject = parsedStores["result"]
{
self.parseJSON(stores)
}
}
} catch let error as NSError {
print(error.localizedDescription)
}
}else
{
//we got an error
print("Error getting stores :\(error!.localizedDescription)")
}
})
taskData.resume()
}
}
func parseJSON(jsonData:AnyObject)
{
if let storeData = jsonData as? [[NSObject:AnyObject]]
{
var store:Store
//we loop through all the recors and everytime we create
// an object of kind store and then add to the store list
for s in storeData
{
store = Store()
// this part is getting the values
if let sId:AnyObject = s["id"]
{
if let storeID = sId as? String
{
print("Store id = \(storeID)")
store.storeId = storeID
}
}
if let sn:AnyObject = s["name"]
{
if let storeName = sn as? String
{
store.storeName = storeName
}
}
storeList += [store]
}
NSOperationQueue.mainQueue().addOperationWithBlock()
{
self.tableView.reloadData()
}
}
}
}
//Detail View
import UIKit
class TableViewController: UITableViewController {
var storeList = [Store]()
//var storeList:Store?
override func viewDidLoad() {
super.viewDidLoad()
/*
if let s = storeList
{
txtName.text = s.storeName
}
*/
// Uncomment the following line to preserve selection between presentations
//self.clearsSelectionOnViewWillAppear = true
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
self.loadRecords()
self.tableView.reloadData()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.tableView.reloadData() // to reload selected cell
//tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return storeList.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
//let cell = tableView.dequeueReusableCellWithIdentifier("reuseIdentifier", forIndexPath: indexPath)
// Configure the cell...
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! StoreTVC
let s = storeList[indexPath.row] as Store
cell.lblName.text = s.storeName
//cell.lblID.text = s.storeId
return cell
}
// for swipe delete
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
storeList.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
/*
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
*/
/*
// Override to support editing the table view.
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
// Delete the row from the data source
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
} else if editingStyle == .Insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
override func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return false if you do not want the item to be re-orderable.
return true
}
*/
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
/*
if segue.identifier == "details"
{
//if let indexPath = tableView.indexPathForCell(sender as! UITableViewCell)
if let indexPath = tableView.indexPathForSelectedRow
{
let s = storeList[indexPath.row] as Store
let dvc = segue.destinationViewController as! ViewDetails
dvc.store = s
}
}
*/
if let indexPath = tableView.indexPathForCell(sender as! UITableViewCell)
{
let s = storeList[indexPath.row] as Store
let dvc = segue.destinationViewController as! ViewDetails
dvc.store = s
}
}
func loadRecords()
{
//The address of the web service
let urlString = "http://localhost/crud/read_for_table_view.php"
// 1 - Create the session by getting the configuration and then crrating the session
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config, delegate: nil, delegateQueue: nil)
//2 - Create the URL Object
if let url = NSURL(string: urlString)
{
//3 - Create the request object
let request = NSURLRequest(URL: url)
//4 - execute the request
let taskData = session.dataTaskWithRequest(request, completionHandler: {
(data: NSData?, response:NSURLResponse?, error: NSError?) -> Void in
//5 - Do something with the Data back
if(data != nil)
{
//we got some data back
print("\(data)")
/*
var parseError:NSError?
let parsedStores = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &parseError) as! NSDictionary
*/
do {
if let parsedStores = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary {
print("Json Data \n \(parsedStores)")
if let stores:AnyObject = parsedStores["result"]
{
self.parseJSON(stores)
}
}
} catch let error as NSError {
print(error.localizedDescription)
}
}else
{
//we got an error
print("Error getting stores :\(error!.localizedDescription)")
}
})
taskData.resume()
}
}
func parseJSON(jsonData:AnyObject)
{
if let storeData = jsonData as? [[NSObject:AnyObject]]
{
var store:Store
//we loop through all the recors and everytime we create
// an object of kind store and then add to the store list
for s in storeData
{
store = Store()
// this part is getting the values
if let sId:AnyObject = s["id"]
{
if let storeID = sId as? String
{
print("Store id = \(storeID)")
store.storeId = storeID
}
}
if let sn:AnyObject = s["name"]
{
if let storeName = sn as? String
{
store.storeName = storeName
}
}
storeList += [store]
}
NSOperationQueue.mainQueue().addOperationWithBlock()
{
self.tableView.reloadData()
}
}
}
}
Can you please help ?
Upvotes: 19
Views: 5993
Answers (5)
Kazi Omar Faruk
Reputation: 117
Hope this code will help you.
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
self.storeList.remove(at: indexPath.row)
self.tableView.beginUpdates()
self.tableView.deleteRows(at: [indexPath], with: .automatic)
self.tableView.endUpdates()
}
}
Upvotes: 1
tanvir
Reputation: 317
So I got answer.
here is the update
import UIKit
class TableViewController: UITableViewController {
var storeList = [Store]()
//var storeList:Store?
override func viewDidLoad() {
super.viewDidLoad()
/*
if let s = storeList {
txtName.text = s.storeName
}
*/
// Uncomment the following line to preserve selection between presentations
//self.clearsSelectionOnViewWillAppear = true
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
self.loadRecords()
self.tableView.reloadData()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.loadRecords() // to reload selected cell
//tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return storeList.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
//let cell = tableView.dequeueReusableCellWithIdentifier("reuseIdentifier", forIndexPath: indexPath)
// Configure the cell...
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! StoreTVC
let s = storeList[indexPath.row] as Store
cell.lblName.text = s.storeName
//cell.lblID.text = s.storeId
return cell
}
// for swipe delete
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
storeList.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
}
}
/*
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
*/
/*
// Override to support editing the table view.
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
// Delete the row from the data source
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
} else if editingStyle == .Insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
override func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return false if you do not want the item to be re-orderable.
return true
}
*/
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
/*
if segue.identifier == "details" {
//if let indexPath = tableView.indexPathForCell(sender as! UITableViewCell)
if let indexPath = tableView.indexPathForSelectedRow {
let s = storeList[indexPath.row] as Store
let dvc = segue.destinationViewController as! ViewDetails
dvc.store = s
}
}
*/
if let indexPath = tableView.indexPathForCell(sender as! UITableViewCell) {
let s = storeList[indexPath.row] as Store
let dvc = segue.destinationViewController as! ViewDetails
dvc.store = s
}
}
func loadRecords() {
//The address of the web service
let urlString = "http://localhost/crud/read_for_table_view.php"
// 1 - Create the session by getting the configuration and then crrating the session
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config, delegate: nil, delegateQueue: nil)
//2 - Create the URL Object
if let url = NSURL(string: urlString) {
//3 - Create the request object
let request = NSURLRequest(URL: url)
//4 - execute the request
let taskData = session.dataTaskWithRequest(request, completionHandler: {
(data: NSData?, response:NSURLResponse?, error: NSError?) -> Void in
//5 - Do something with the Data back
if (data != nil) {
//we got some data back
print("\(data)")
/*
var parseError:NSError?
let parsedStores = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &parseError) as! NSDictionary
*/
do {
if let parsedStores = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary {
print("Json Data \n \(parsedStores)")
if let stores:AnyObject = parsedStores["result"] {
self.parseJSON(stores)
}
}
} catch let error as NSError {
print(error.localizedDescription)
}
} else {
//we got an error
print("Error getting stores :\(error!.localizedDescription)")
}
})
taskData.resume()
}
}
func parseJSON(jsonData:AnyObject) {
storeList.removeAll()
if let storeData = jsonData as? [[NSObject:AnyObject]] {
var store:Store
//we loop through all the recors and everytime we create
// an object of kind store and then add to the store list
for s in storeData {
store = Store()
// this part is getting the values
if let sId:AnyObject = s["id"] {
if let storeID = sId as? String {
print("Store id = \(storeID)")
store.storeId = storeID
}
}
if let sn:AnyObject = s["name"] {
if let storeName = sn as? String {
store.storeName = storeName
}
}
storeList += [store]
}
NSOperationQueue.mainQueue().addOperationWithBlock() {
self.tableView.reloadData()
}
}
}
}
Upvotes: 7
tendai
Reputation: 1250
I know this is an old question, but my 2 cents are, if you want to reload your tableview, as long as when you're making any updates your storeList array in any way, you can just make use of didSet when declaring your storeList like this:
var storeList: [Store] = []{
didSet{
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}
With the above, you are saying, any time the storeList array has content removed, added or updated in any way, then on the main UI, reload the tableView, this way you don't need to manually make changes to your tableView, but changes to the storeList will trigger changes to the tableView
Upvotes: 2
Pranavan SP
Reputation: 1865
Here is the better solution for you rather than reload tableview in viewWillAppear. Approach using delegate.
On your Detail View Controller add.
weak var delegate : TableViewController!
Modify line of code on Table View Controller
if segue.identifier == "details"{
if let indexPath = tableView.indexPathForSelectedRow{
let s = storeList[indexPath.row] as Store
let dvc = segue.destinationViewController as! ViewDetails
dvc.store = s
dvc.delegate = self
}
}
When action complete on your Detail View or before dismiss details view. Execute below line in your Detail View.
self.delegate.tableView.reloadData()
Here I hope it's better way and best practice rather than your approach. Try it. :)
Upvotes: 5
Jigar Tarsariya
Reputation: 3247
Try Below Code:
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == UITableViewCellEditingStyle.Delete {
storeList.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
self.loadRecords()
}
}
Hope this will help you
Upvotes: 4
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