SOLVED: PROJECT 1 / TASK 3 – 100 Days of Swift – Hacking with Swift forums

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SOLVED: PROJECT 1 / TASK 3

Forums > 100 Days of Swift

	@emelkhan09 Apr '20 Can anyone show what i should do in it ? 3
	@MateusZ Apr '20 Hey there friend! I had the same problem, read through this thread, it might help you: https://www.hackingwithswift.com/forums/100-days-of-swift/project-1-challenge-task-3/624 I you need any further assistance, I'll do my best to help! 3
	@emelkhan09 Apr '20 I have seen that and need some help 3
	@emelkhan09 Apr '20 When i create selectedPictureNumber in DetailViewController, i can't find it in ViewController 3
	@MateusZ Apr '20 That's the point! You have to refer to it yourself. Take a look at `override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {}` in your main View Controller. This is the place where you refer to selectedPictureNumber and other stuff, just like this: `vc.selectedPictureNumber = indexPath.row + 1 // We add 1 to the indexPath.row because we want the selectedPictureNumber to start from 1, not 0.` You can read 'vc' up here as the Detail View Controller. So what the line above means, is: "The property 'selectedImage' from the Detail View Controller is made by adding +1 to the `indexPath.row` integer of the property 'pictures', found in the main View Controller." 5
	@emelkhan09 May '20 Thank you ! You solved my problem 3
	@BaderBouta Jul '20 @MateusZ One thing that I don't get is this bit of code `indexPath.row + 1` It doesn't reference to anything, right? How does it know what kind of indexPath.row + 1 it needs to ''get"? I ask this because this is the way i wrote that other variable that we needed in the challange. `vc.totalPictures = pictures.count` As you can see it references to 'picutures' where does this code reference to? `vc.selectedPictureNumber = indexPath.row + 1` Little confused here. 3
	@MateusZ Jul '20 Hello, According to Paul's instructions, in `DetailViewController` we create a property `var selectedPictureNumber`. Also, in `DetailViewController`, we put this in `ViewDidLoad()` method: `title = "Picture \(selectedPictureNumber) of \(totalPictures)"` While `totalPictures = pictures.count` (which is 10), `selectedPictureNumber` is equal to the number of the picture's row + 1. `indexPath.row` is the row of the currently tapped picture in the table view controller. So, if we tap on the FIRST picture the table view, the title of the picture will be: Picture 1 of 10 If we didn't add + 1 to `indexPath.row`, the title of the first picture would be: Picture 0 of 10 Hope that helps! 3

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