访问Bundle资源

Bundle+Fix.swift

public let localBundle = Bundle.fixedModule

private final class CurrentBundleFinder {}

private let bundleNameIOS = "Backend_Backend"
private let bundleNameTests = "Backend_BackendTests"

extension Foundation.Bundle {
    
    /// Returns the resource bundle associated with the current Swift module.
    ///
    /// # Notes: #
    /// 1. This is inspired by the `Bundle.module` declaration
    static var fixedModule: Bundle = {
        
        let candidates = [
            // Bundle should be present here when the package is linked into an App.
            Bundle.main.resourceURL,
            
            // Bundle should be present here when the package is linked into a framework.
            Bundle(for: CurrentBundleFinder.self).resourceURL,
            
            // For command-line tools.
            Bundle.main.bundleURL,
            
            // Bundle should be present here when running previews from a different package
            // (this is the path to "…/Debug-iphonesimulator/").
            Bundle(for: CurrentBundleFinder.self).resourceURL?
                .deletingLastPathComponent().deletingLastPathComponent().deletingLastPathComponent(),
            Bundle(for: CurrentBundleFinder.self).resourceURL?
                .deletingLastPathComponent().deletingLastPathComponent(),
        ]
        
        for candidate in candidates {
            let bundlePathiOS = candidate?.appendingPathComponent(bundleNameIOS + ".bundle")
            let bundlePathTests = candidate?.appendingPathComponent(bundleNameTests + ".bundle")
            if let bundle = candidate.flatMap(Bundle.init(url:)) {
                return bundle
            }else if let bundle = bundlePathiOS.flatMap(Bundle.init(url:)) {
                return bundle
            } else if let bundle = bundlePathTests.flatMap(Bundle.init(url:)) {
                return bundle
            }
        }
        
        fatalError("unable to find bundle")
    }()
    
}