How to substitute string name from a struct with its corresponding image name?

Question

I have a struct to store name and image names of pictures which are already bundled in app as follows

struct City { var name: String
              var imageName: String }

class firstViewController: UIViewController

let cities = [City(name:"City00", imageName:"city_00"),
              City(name:"City01", imageName:"city_01"),
              City(name:"City02", imageName:"city_02")]

In displayViewController, I have a variable nowCityImages to store data selected from firstViewcontroller

class displayViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, NSFetchedResultsControllerDelegate {

var nowCityImages: [String] = []

Now I want to display image of city in tableview

public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
    let myCell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! CityCell

    let outCityImages = nowCityImages[indexPath.item]

    // This is not displaying any images
     myCell.cityImage.image = UIImage(named:outCityImages)

   return myCell
}

If I use print(outCityImages), I am getting following output as excepted

City00
City02

but I don't know how to replace City00 with city_00 and City02 with city_02 in tableview cell so that it displays the image.

@JimmyJames, that question is for searching, I am looking for substituting — leaner122
– leaner122, Commented Dec 23, 2016 at 8:15
Check the statement where you add or append strings to nowCityImages. It should be similar to city.imageName not city.name. e.g. nowCityImages.append(cities[0].imageName) — bunty
– bunty, Commented Dec 23, 2016 at 8:16

Horst · Accepted Answer · 2016-12-23 08:52:31Z

0

if the number at the end is 2 digit length:

var str = "City00"
let index = str.index(str.endIndex, offsetBy: -2)

var str1 = str.substring(to: index).lowercased()
var str2 = str.substring(from: index)
let name = "\(str1)_\(str2)" //city_00

answered Dec 23, 2016 at 8:52

Horst

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2 Comments

leaner122 Over a year ago

That is not always the case, I just gave an example to spell out my problem.I like to know how to substitute corresponding names of cities I am getting with their image names.

Horst Over a year ago

In displayViewController, there is the city name only. I think you might pass City object/imageName to displayViewController rather than the city name only or create a method to get city object by city name.

ERbittuu · Accepted Answer · 2016-12-23 09:34:34Z

0

Can you change to code of getting nowCityImages to this

    var nowCityImages: [String] = cities.filter(){$0.imageName}

Now it will return image name as you want.

answered Dec 23, 2016 at 9:34

ERbittuu

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