How do you get the original filename of a sprite/texture in Swift? - ios

Question

I create a sprite and assign an image file to it.
var logoImage = SKSpriteNode(imageNamed: "image1.png")
Then in some circumstances, I change the image.
logoImage.texture = SKTexture(imageNamed: "image2.png")
In another part of the app I want to check which image is currently being displayed. But I don't know how to get the filename.
Using:
print(logoImage.texture?.description)
Returns:
"<SKTexture> 'image2.png' (500 x 500)"
Which obviously contains the filename, but how do I get the filename on it's own?

Answer 1

I suggest your to avoid exposing the internal logic of your objects.
And definitely you should NOT build your game logic on the texture currently used. The presentation should be a mere representation of the actual data.
So you should create your own class that wraps logic and data, like this.
class Logo: SKSpriteNode {
enum Type: String {
case A = "Image1", B = "Image2"
var imageName: String {
return self.rawValue
}
}
private var type: Type {
didSet {
self.texture = SKTexture(imageNamed: type.imageName)
}
}
init(type: Type) {
self.type = type
let texture = SKTexture(imageNamed: type.imageName)
super.init(texture: texture, color: .clearColor(), size: texture.size())
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
Usage
Now you can easily create a Logo
let logo = Logo(type: .A)
You can change the texture for that sprite
logo.type = .B
And you can check what texture is currently using
switch logo.type {
case .A: print("It's using Image1")
case .B: print("it's using Image2")
}
Last thing. I replaced Image1.png and Image2.png with Image1 and Image2. If you are using Asset Catalog (and you should) then you don't need to specify the file extension.

Answer 2

You could use:
if logoImage.texture?.descriptio.containsString("image1.png") {
// your code for image1 here
} else {
// your code for image2 here
}
You'll have use:
import Foundation
in your code for containsString

Answer 3

I'm pretty sure that there is a more elegant method but it works:
if let rangeOfIndex = texture.description.rangeOfCharacterFromSet(NSCharacterSet(charactersInString: "'"), options: .BackwardsSearch) {
let filename = texture.description.substringToIndex(rangeOfIndex.endIndex)
if let r = filename.rangeOfCharacterFromSet(NSCharacterSet(charactersInString: "'"), options: .LiteralSearch) {
print(filename.substringFromIndex(r.startIndex).stringByReplacingOccurrencesOfString("'", withString: "", options: NSStringCompareOptions.LiteralSearch, range: nil))
}
}

Answer 4

You could use this :
func getTextureName(textureTmp: String) -> String {
var texture:String = ""
var startInput = false
for char in textureTmp {
if startInput {
if char != "'" {
texture += String(char)
} else {
return texture
}
}
if char == "'" {
startInput = true
}
}
return texture
}
Its not beautiful but it works