import UIKit
import MapKit
import CoreLocation
class CourseClass2: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate, UITableViewDelegate, UITableViewDataSource {
@IBOutlet weak
var map: MKMapView!
@IBOutlet weak
var mapCourse: UIImageView!
@IBOutlet weak
var tableView: UITableView!
struct User {
var name: String
var images: UIImage
var coordinate: (Double, Double)
var type: String
var address: String
}
var rows = 0
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
insertRowsMode3()
}
func insertRowsMode2() {
for i in 0.. < users.count {
insertRowMode2(ind: i, usr: users[i])
}
}
func insertRowMode2(ind: Int, usr: User) {
let indPath = IndexPath(row: ind, section: 0)
rows = ind + 1
tableView.insertRows(at: [indPath], with: .right)
}
func insertRowsMode3() {
rows = 0
insertRowMode3(ind: 0)
}
func insertRowMode3(ind: Int) {
let indPath = IndexPath(row: ind, section: 0)
rows = ind + 1
tableView.insertRows(at: [indPath], with: .right)
guard ind < users.count - 1
else {
return
}
DispatchQueue.main.asyncAfter(deadline: .now() + 0.15) {
self.insertRowMode3(ind: ind + 1)
}
}
func numberOfSections( in tableView: UITableView) - > Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) - > Int {
return rows
}
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) - > UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell",
for: indexPath) as!MyTableViewCell
let user = users[indexPath.row]
cell.MyImage.image = user.images
cell.MyLabel.text = user.name
cell.MyTypeLabel.text = user.type
return (cell)
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "goToLast", sender: users[indexPath.row])
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) - > CGFloat {
return 100
}
override func prepare(
for segue: UIStoryboardSegue, sender: Any ? ) {
if segue.identifier == "goToLast" {
guard
let vc = segue.destination as ? FinalClass
else {
return
}
let guest = segue.destination as!FinalClass
if let user = sender as ? User {
guest.local = user.name
guest.localImage = user.images
guest.localType = user.type
guest.localAddress = user.address
}
}
}
@IBAction func IndTapped(_ sender: Any) {
self.performSegue(withIdentifier: "goBack", sender: self)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Hello guys, this is the code of the ViewController where i get the error, i added a tableView with a particular animation but when i change the view and than come back with the dismiss(animated: true, completion: nil)the application crash because there is some inconsistency with rows data. As you can see, when i'm first visiting this CourseClass2 controller i'm setting up row by calling insertRowsMode3 in viewDidAppear.
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
insertRowsMode3()
}
The problem is when i come back the row data is not same as i have initialised it with zero and viewDidAppear doesn't get called. I know the error but i don't how i can change my code to make it work. I really need an help.
The app crush exactly in this func
func insertRowMode3(ind:Int) {
let indPath = IndexPath(row: ind, section: 0)
rows = ind + 1
tableView.insertRows(at: [indPath], with: .right)
guard ind < users.count-1 else { return }
DispatchQueue.main.asyncAfter(deadline: .now()+0.15) {
self.insertRowMode3(ind: ind+1)
}
}
here tableView.insertRows(at: [indPath], with: .right)
