swift Cannot assign value of type 'Int' to type 'String'

Question

Here is my code. I am a beginner using Swift and my code does not work.

Error in view controller was shown:

Cannot assign value of type 'Int' to type 'String'

And:

Could not cast value of type '__NSCFNumber' (0x104061840) to 'NSString' (0x1031324a8). 2019-09-30 01:46:05.056249+0900 Community[20037:815002] Could not cast value of type '__NSCFNumber' (0x104061840) to 'NSString' (0x1031324a8).

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    // getting index of the cell wherein comments button has been pressed
    let indexPathRow = (sender as! UIButton).tag

    // accessing segue we need -> CommentsVC
    if segue.identifier == "CommentsVC" {

        // accessing destination ViewController -> CommentsVC
        let vc = segue.destination as! CommentsVC

        // assigning values to the vars of CommentsVC
        vc.avaImage = avaImageView.image!
        vc.fullnameString = fullnameLable.text!
        vc.dateString = posts[indexPathRow]!["date_created"] as! String

        vc.textString = posts[indexPathRow]!["text"] as! String


        ////////////
        // sending id of the post
        vc.post_id = posts[indexPathRow]!["id"] as! Int


        // sending the image to the CommentsVC
        let indexPath = IndexPath(item: indexPathRow, section: 0)

        guard let cell = tableView.cellForRow(at: indexPath) as? PicCell else {
            return
        }

        vc.pictureImage = cell.pictureImageView.image!

    }

Cannot assign value of type 'Int' to type 'String'

on:

vc.post_id = posts[indexPathRow]!["id"] as! Int

Not directly related to your issue but you should redo your data structure to use a Swift struct instead of dictionary. — rmaddy
– rmaddy, Commented Sep 29, 2019 at 17:11

vadian · Accepted Answer · 2019-09-29 17:28:49Z

1

Please read the error message, it's pretty clear: post_id is declared as String but the dictionary value is an Int

And please conform to the Swift naming convention and name variables lowerCamelCased

Two solutions:

Declare postId as Int
```
var postId : Int
```

Create a String from the dictionary value

vc.postId = String(posts[indexPathRow]!["id"] as! Int)

And please conform to the Swift

answered Sep 29, 2019 at 17:28

vadian

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