Delete record without navigate another controller

Question

Created Mar ’21

Replies 1

Boosts 0

Participants 2

Code Block     func deleteData(id:String){

Code Block 	 
	 let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: "User")
	 fetchRequest.predicate = NSPredicate(format: "id = '\(id)'")
	
	 do
	 {
			 let test = try context.fetch(fetchRequest)
			 
			 let objectToDelete = test[0]
			 context.delete(objectToDelete)
			 
			 do{
					 try context.save()
			 }
			 catch(let error)
			 {
				print(error.localizedDescription)
			 }
			 
	 }
	 catch(let error)
	 {
			 print(error)
	 }

Code Block     }

This is delete function

Code Block class SecondViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {

Code Block     var array = [Dictionary<String,String>]()

Code Block 
@IBOutlet weak var tableview: UITableView!
var id = ""
var obj = Dictionary<String,String>()
override func viewDidLoad() {
		super.viewDidLoad()

Code Block         self.tableview.delegate = self
        self.tableview.dataSource = self

Code Block         array = DataHandler.sharedInstance.fetch()
    }

Code Block     func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return array.count
    }

Code Block     func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

Code Block         let obj = array[indexPath.row]
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! TableViewCell

Code Block         cell.usernameLabel.text = obj["username"]
        cell.emailLabel.text = obj["email"]
        cell.passwordLabel.text = obj["password"]

Code Block         cell.updateBtn.addTarget(self, action: #selector(didTapUpdateBtn(sender:)), for: .touchUpInside)
        cell.updateBtn.tag = indexPath.row
        
        return cell
    }

Code Block      @objc func didTapUpdateBtn(sender:UIButton)
    {
        let obj = array[sender.tag]
        let sb = UIStoryboard.init(name: "Main", bundle: nil)
        let vc = sb.instantiateViewController(identifier: "update") as! UpdateViewController
        vc.obj = obj
        self.present(vc, animated: true, completion: nil)
        
    }
This is tableview controller

Code Block     class TableViewCell: UITableViewCell {
    @IBOutlet weak var usernameLabel: UILabel!
    @IBOutlet weak var emailLabel: UILabel!
    @IBOutlet weak var passwordLabel: UILabel!
    @IBOutlet weak var idLabel: UILabel!
    
    @IBOutlet weak var updateBtn: UIButton!
    @IBOutlet weak var deleteBtn: UIButton!
    
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }
    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)
        // Configure the view for the selected state
    }

This is table view cell

I am performing crud operation with core data.I have performed 3 operation successful which is working fine but in delete operation we have no need to navigate another controller just click on button action will be performed.I am so confused how to do it i have tried so many method.

Boost

Answer 1

Claude31 OP

Mar ’21

but in delete operation we have no need to navigate another controller just click on button action will be performed

Where do you navigate to ? Is it UpdateViewController ?
Which button do you tap ?

Note: When you format code, take care to format in a single chunk. It is easier to read:

Code Block func deleteData(id:String){
	 
	 let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: "User")
	 fetchRequest.predicate = NSPredicate(format: "id = '\(id)'")
	
	 do
	 {
			 let test = try context.fetch(fetchRequest)
			 let objectToDelete = test[0]
			 context.delete(objectToDelete)
			 
			 do {
					 try context.save()
			 }
			 catch(let error)
			 {
				print(error.localizedDescription)
			 }
			 
	 }
	 catch(let error)
	 {
			 print(error)
	 }
  }

Code Block class SecondViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {
    var array = [Dictionary<String,String>]()
    @IBOutlet weak var tableview: UITableView!
    var id = ""
    var obj = Dictionary<String,String>()
    override func viewDidLoad() {
		super.viewDidLoad()
        self.tableview.delegate = self
        self.tableview.dataSource = self
        array = DataHandler.sharedInstance.fetch()
    }
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return array.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        
        let obj = array[indexPath.row]
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! TableViewCell
        
        cell.usernameLabel.text = obj["username"]
        cell.emailLabel.text = obj["email"]
        cell.passwordLabel.text = obj["password"]
    
        cell.updateBtn.addTarget(self, action: #selector(didTapUpdateBtn(sender:)), for: .touchUpInside)
        cell.updateBtn.tag = indexPath.row
        
        return cell
    }
     @objc func didTapUpdateBtn(sender:UIButton)
    {
        let obj = array[sender.tag]
        let sb = UIStoryboard.init(name: "Main", bundle: nil)
        let vc = sb.instantiateViewController(identifier: "update") as! UpdateViewController
        vc.obj = obj
        self.present(vc, animated: true, completion: nil)
    }

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