import UIKit
import WebKit
final class ZeroNativeHostViewController: UIViewController {
private let webView = WKWebView(frame: .zero)
private var nativeApp: UnsafeMutableRawPointer?
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .systemBackground
webView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(webView)
NSLayoutConstraint.activate([
webView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
webView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
webView.topAnchor.constraint(equalTo: view.topAnchor),
webView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
])
nativeApp = zero_native_app_create()
if let nativeApp {
zero_native_app_start(nativeApp)
}
webView.loadHTMLString(Self.html, baseURL: nil)
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
guard let nativeApp else { return }
let scale = Float(view.window?.screen.scale ?? UIScreen.main.scale)
zero_native_app_resize(nativeApp, Float(view.bounds.width), Float(view.bounds.height), scale, nil)
zero_native_app_frame(nativeApp)
}
deinit {
guard let nativeApp else { return }
zero_native_app_stop(nativeApp)
zero_native_app_destroy(nativeApp)
}
private static let html = """
zero-native
iOS Example
This WKWebView is hosted by Swift and linked to the zero-native C ABI.
"""
}