如何在 UIwebview 中保存缓存？

Question

我希望 webview 保存缓存以供以后用于快速 web 加载，这个 webview 代码是用 swift 3 编写的 你能帮帮我吗

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

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