SOLVED: Project 1 - challenge task 3. – 100 Days of Swift – Hacking with Swift forums

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SOLVED: Project 1 - challenge task 3.

Forums > 100 Days of Swift

	@MateusZ Apr '20 Hi guys, I've been trying to wrap my head around one of Paul's hints saying: "So, we can use indexPath.row to set the selectedPictureNumber property in DetailViewController – just make sure you add 1 to it so that it counts from 1 rather than 0." Got totally lost with how I can use indexPath.row in DetailViewController without triggering the "Unresolved Identifier" error. What am I doing wrong? Cheers! 3
	@roosterboy HWS+ Apr '20 You don't use `indexPath.row` in `DetailViewController`; you use it it `ViewController`'s `didSelectRowAt` to set `DetailViewController.selectedPictureNumber` when you instantiate that controller. 6
	@MateusZ Apr '20 Ok, thanks! For total pictures I used pictures.count - was I supposed to do it this way? Anyway, the code works, which makes my brain free for the rest of the day :D Thanks! 3
	@fxdlsRider Apr '20 Well if it works the way you want it, it's okay. ;-) 3
	@finer-details Sep '20 Solved it also. Took some trying and figuring out, but once I had it I understood why. Also, I found that if I pulled up print(imageToLoad.count) in DetailedViewController I got an output of 12. Unsure why, possibly something to do with the Loops? So I called this .count from ViewController before passing it to DetailedViewController I hope this helps anyone, without giving away the full coded answer. 3
	@haitang Nov '20 great! roosterboy's way works! 3
	@joepham Jan '21 I'm late to the game, but would like to give my 2 cents too for folks that want more visual It's something like this in `ViewController.swift` override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { // 1: Try loading "Detail" view controller & type casting it to be DetailViewController if let detailVC = storyboard?.instantiateViewController(withIdentifier: "Detail") as? DetailViewController { // 2: If success -> set property values over in DetailViewController.swift // Set "selectedImage" string value detailVC.selectedImage = pictures[indexPath.row] // Set values to selectedImagePosition & totalNumberOfImages detailVC.selectedImagePosition = indexPath.row + 1 // "+1" to show human-readable index number instead of Swift index number approach detailVC.totalNumberOfImages = pictures.count // Equates total count of pictures array // 3: Now push it onto the navigation controller navigationController?.pushViewController(detailVC, animated: true) } } While over in `DetailViewController.swift` you declare the 2 new vars inside the overriden `viewDidLoad()` method 6

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