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zaimramlan/scaled_asset_url_string.swift

Created May 20, 2019 00:12
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Revisions

  1. zaimramlan created this gist May 20, 2019.
    26 changes: 26 additions & 0 deletions scaled_asset_url_string.swift
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,26 @@
    import UIKit

    extension String {
    private var isURLString: Bool {
    return URL(string: self) != nil
    }

    private var isAssetURL: Bool {
    let asset = self.components(separatedBy: ".").last
    return asset == "png" || asset == "jpg" || asset == "pdf"
    }

    var scaledAssetURL: String {
    let scale = Int(UIScreen.main.scale)
    guard isURLString, isAssetURL, scale != 1 else { return self }

    var path = self
    let components = path.components(separatedBy: ".")
    let asset = components.last ?? "png"
    path = components.dropLast().joined(separator: ".")
    return "\(path)@\(scale)x.\(asset)"
    }
    }

    let path = "https://www.domain.com/app-assets/asset.png"
    path.scaledAssetURL