Array list Rearrangement in swift

Hello guy, Today we will learn about Array list Rearrangement in swift.

Sometimes we need to change the position of the array like I want to change the array index 6 value to index 2 and remain list is the same as per their position. At that time we need to do array rearrangement. let’s start with an example.

Getting Started:-

Step1:- Firstly, Create an Xcode project

File –> New –> Project –> iOS –> Next and add your project name then create.

xcode image for Array list Rearrangement

Step 2:- Secondly, Create a table view in the storyboard.

xcode stoaryboard image for Array list Rearrangement

Step 3:- Now, Create a swift class and add the code and run the code.

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var listTableView: UITableView!
    
    var arrayList:[String] = ["one", "Two", "Three", "Four","Five", "Six","Seven", "Eight", "Nine", "Ten"]

    override func viewDidLoad() {
        super.viewDidLoad()
        listTableView.delegate = self
        listTableView.dataSource = self
        listTableView.reloadData()
        // Do any additional setup after loading the view.
    }


}

extension ViewController : UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return arrayList.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if let cell = tableView.dequeueReusableCell(withIdentifier: "ListTableViewCell") as? ListTableViewCell {
            
            cell.valueLabel.text = arrayList[indexPath.row]
            
            return cell
        }
        return UITableViewCell()
    }
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 50
    }
 
}

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var listTableView: UITableView!

var arrayList:[String] = ["one", "Two", "Three", "Four","Five", "Six","Seven", "Eight", "Nine", "Ten"]

override func viewDidLoad() {

super.viewDidLoad()

listTableView.delegate = self

listTableView.dataSource = self

listTableView.reloadData()

// Do any additional setup after loading the view.

}

extension ViewController : UITableViewDelegate, UITableViewDataSource {

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

return arrayList.count

}

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

if let cell = tableView.dequeueReusableCell(withIdentifier: "ListTableViewCell") as? ListTableViewCell {

cell.valueLabel.text = arrayList[indexPath.row]

return cell

}

return UITableViewCell()

}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {

return 50

}

And the output is –

device output screen for Array list Rearrangement

Step 4:- Now, I want to change the position of the array list. In my example I want to change the number nine position at index 2, For this, I need to call a function.

    func arrayRearrange<T>(array: Array<T>, fromIndex: Int, toIndex: Int) -> Array<T>{
        var arrayValue = array
        let element = arrayValue.remove(at: fromIndex)
        arrayValue.insert(element, at: toIndex)

        return arrayValue
    }

func arrayRearrange<T>(array: Array<T>, fromIndex: Int, toIndex: Int) -> Array<T>{

var arrayValue = array

let element = arrayValue.remove(at: fromIndex)

arrayValue.insert(element, at: toIndex)

return arrayValue

}

Step 5:- Function calling to change the position. you just need to call

arrayList = arrayRearrange(array: arrayList, fromIndex: 8, toIndex: 2)

1	arrayList = arrayRearrange(array: arrayList, fromIndex: 8, toIndex: 2)

Step 6:- Lastly, Run the project and see the result!!!

In this screenshot, you will see that number nine is shifted to position 2, and the remaining array is the same.

Conclusion:-

In this blog, we have discussed Array list Rearrangement in swift.

I hope this blog will help you to understand the rearrangement process of the array.

To learn about more iOS-related topics, Please click here.

Thanks for reading!!!

Khushboo Gupta 30 August 2022

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Array list Rearrangement in swift

Getting Started:-

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