swift - 如何在UIwebview中保存缓存？

Question

我希望 webview 保存缓存以便稍后用于快速 web 加载，这个 webview 代码是用 swift 3 编写的 你能帮我吗

import UIKit

class FirstViewController: UIViewController   {


@IBOutlet var webfirst: UIWebView!

override func viewDidLoad() {
    super.viewDidLoad()

    let urlfirst = URL(string: "https://google.com")
    webfirst?.loadRequest(URLRequest(url:urlfirst!))

}

override var prefersStatusBarHidden: Bool {
    return true
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

}

Answer 1

只需将cachePolicy设置为.returnCacheDataElseLoad

让 urlfirst = URL(字符串: "https://google.com")
var urlRequest = URLRequest(url:urlfirst!)
urlRequest.cachePolicy = .returnCacheDataElseLoad
webfirst?.loadRequest(urlRequest)