ios 如何删除 WKWebview 中的缓存？

How to remove cache in WKWebview?

提问by Sravan

Any one worked with WKWebviewand tried to clear cache ? If yes, how to do? any example ?

任何人一起工作WKWebview并试图清除缓存？如果是，怎么办？任何例子？

P.S. :Normal NSURLCache is not working.

PS：正常的 NSURLCache 不起作用。

回答by Shingo Fukuyama

In iOS 9

在 iOS 9 中

// Optional data
NSSet *websiteDataTypes
= [NSSet setWithArray:@[
                        WKWebsiteDataTypeDiskCache,
                        //WKWebsiteDataTypeOfflineWebApplicationCache,
                        WKWebsiteDataTypeMemoryCache,
                        //WKWebsiteDataTypeLocalStorage,
                        //WKWebsiteDataTypeCookies,
                        //WKWebsiteDataTypeSessionStorage,
                        //WKWebsiteDataTypeIndexedDBDatabases,
                        //WKWebsiteDataTypeWebSQLDatabases,
                        //WKWebsiteDataTypeFetchCache, //(iOS 11.3, *)
                        //WKWebsiteDataTypeServiceWorkerRegistrations, //(iOS 11.3, *)
                        ]];
// All kinds of data
// NSSet *websiteDataTypes = [WKWebsiteDataStore allWebsiteDataTypes];
// Date from
NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
// Execute
[[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:^{
   // Done
}];

回答by Esqarrouth

Updated Swift 5 version:

更新的 Swift 5 版本：

let websiteDataTypes = NSSet(array: [WKWebsiteDataTypeDiskCache, WKWebsiteDataTypeMemoryCache])
let date = Date(timeIntervalSince1970: 0)
WKWebsiteDataStore.default().removeData(ofTypes: websiteDataTypes as! Set<String>, modifiedSince: date, completionHandler:{ })

---

---

Swift version:

迅捷版：

if #available(iOS 9.0, *) {
  let websiteDataTypes = NSSet(array: [WKWebsiteDataTypeDiskCache, WKWebsiteDataTypeMemoryCache])
  let date = NSDate(timeIntervalSince1970: 0)
  WKWebsiteDataStore.defaultDataStore().removeDataOfTypes(websiteDataTypes as! Set<String>, modifiedSince: date, completionHandler:{ })
} else {
    var libraryPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.LibraryDirectory, NSSearchPathDomainMask.UserDomainMask, false).first!
    libraryPath += "/Cookies"

    do {
      try NSFileManager.defaultManager().removeItemAtPath(libraryPath)
    } catch {
      print("error")
    }
    NSURLCache.sharedURLCache().removeAllCachedResponses()
}

Swift 3 version:

斯威夫特 3 版本：

   if #available(iOS 9.0, *)
    {
        let websiteDataTypes = NSSet(array: [WKWebsiteDataTypeDiskCache, WKWebsiteDataTypeMemoryCache])
        let date = NSDate(timeIntervalSince1970: 0)

        WKWebsiteDataStore.default().removeData(ofTypes: websiteDataTypes as! Set<String>, modifiedSince: date as Date, completionHandler:{ })
    }
    else
    {
        var libraryPath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.libraryDirectory, FileManager.SearchPathDomainMask.userDomainMask, false).first!
        libraryPath += "/Cookies"

        do {
            try FileManager.default.removeItem(atPath: libraryPath)
        } catch {
            print("error")
        }
        URLCache.shared.removeAllCachedResponses()
    }

回答by Peter Kreinz

Remove Cache and Cookies

删除缓存和 Cookie

# WKWebView+Clean.swift

import WebKit

extension WKWebView {
    class func clean() {
        guard #available(iOS 9.0, *) else {return}

        HTTPCookieStorage.shared.removeCookies(since: Date.distantPast)

        WKWebsiteDataStore.default().fetchDataRecords(ofTypes: WKWebsiteDataStore.allWebsiteDataTypes()) { records in
            records.forEach { record in
                WKWebsiteDataStore.default().removeData(ofTypes: record.dataTypes, for: [record], completionHandler: {})
                #if DEBUG
                    print("WKWebsiteDataStore record deleted:", record)
                #endif
            }
        }  
    }
}

Example:

例子：

import WebKit
...
WKWebview.clean()

回答by Shingo Fukuyama

You cannot delete caches only with NSURLCache. After much cut-and-try, I could clear caches by the following steps (as of iOS 8.1.1):

您不能仅使用 NSURLCache 删除缓存。经过多次尝试，我可以通过以下步骤清除缓存（从 iOS 8.1.1 开始）：

1. Use NSURLCache to delete caches in the same way as you used to do on UIWebView. If you use WKProccessPool, re-initialize it.
2. Delete Cachesdirectory in Library.
3. Delete all WKWebViews

1. 使用 NSURLCache 删除缓存的方式与您在 UIWebView 上所做的相同。如果您使用 WKProccessPool，请重新初始化它。
2. 中删除Caches目录Library。
3. 删除所有 WKWebViews

Next time you create WKWebView, caches should be cleared.

下次创建 WKWebView 时，应清除缓存。

ShingoFukuyama/WKWebViewTips

ShingoFukuyama/WKWebViewTips

回答by harrisonlee

I was able to solve this issue by having my WKWebView evaluate window.location.reload. I have a tap gesture recognizer on the web view and whenever it detects a double tap with 2 touches, I run the following:

我能够通过让我的 WKWebView 评估 window.location.reload 来解决这个问题。我在 web 视图上有一个点击手势识别器，每当它检测到双击两次触摸时，我运行以下命令：

webView.evaluateJavaScript("window.location.reload(true)", completionHandler: nil);

Hope this helps.

希望这可以帮助。

回答by nouatzi

Something similar for iOS 9.0 and later:

iOS 9.0 及更高版本的类似内容：

let store: WKWebsiteDataStore = WKWebsiteDataStore.default()
let dataTypes: Set<String> = WKWebsiteDataStore.allWebsiteDataTypes()
store.fetchDataRecords(ofTypes: dataTypes, completionHandler: { (records: [WKWebsiteDataRecord]) in
  store.removeData(ofTypes: dataTypes, for: records, completionHandler: {
    // do your thing here
  })
})

回答by zingle-dingle

Swift 3.x version of @Esqarrouth's post

@Esqarrouth 帖子的 Swift 3.x 版本

func clearCache() {
    if #available(iOS 9.0, *) {
        let websiteDataTypes = NSSet(array: [WKWebsiteDataTypeDiskCache, WKWebsiteDataTypeMemoryCache])
        let date = NSDate(timeIntervalSince1970: 0)
        WKWebsiteDataStore.default().removeData(ofTypes: websiteDataTypes as! Set<String>, modifiedSince: date as Date, completionHandler:{ })
    } else {
        var libraryPath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.libraryDirectory, FileManager.SearchPathDomainMask.userDomainMask, false).first!
        libraryPath += "/Cookies"

        do {
            try FileManager.default.removeItem(atPath: libraryPath)
        } catch {
            print("error")
        }
        URLCache.shared.removeAllCachedResponses()
    }
}

回答by ZAFAR007

Worked
Swift 3. Version.
For Older Version Swift

工作
Swift 3. 版本。
对于旧版本的Swift

import Foundation
import WebKit

func removeWebData() {

    if #available(iOS 9.0, *) {

        let websiteDataTypes = WKWebsiteDataStore.allWebsiteDataTypes()
        let date = NSDate(timeIntervalSince1970: 0)

        WKWebsiteDataStore.default().removeData(ofTypes: websiteDataTypes, modifiedSince: date as Date, completionHandler: {
            #if DEBUG

                print("remove all data in iOS9 later")

            #endif
        })

    }else {

        // Remove the basic cache.
        URLCache.shared.removeAllCachedResponses()

        // Delete system cookie store in the app
        let storage = HTTPCookieStorage.shared
        if let cookies = storage.cookies {
            for cookie in cookies {
                storage.deleteCookie(cookie)
            }
        }


        do {
            // folder ? ???? ?? contents ? ???? ???
            // MainVC ? ???? cache, cookie? ????? ??? ??? cache, cookie ???
            // contents ? ???? ?? ??.

            // Clear web cache
            try deleteLibraryFolderContents(folder: "Caches")

            // Remove all cookies stored by the site. This includes localStorage, sessionStorage, and WebSQL/IndexedDB.
            try deleteLibraryFolderContents(folder: "Cookies")

            // Removes all app cache storage.
            try deleteLibraryFolder(folder: "WebKit")

        } catch {
            #if DEBUG

                print("Delete library folders error in iOS9 below")

            #endif

        }
    }
}

/**
 Delete folder in library

 - parameter folder: a folder you want to delete

 - throws: throws an error
 */
func deleteLibraryFolder(folder: String) throws {
    let manager = FileManager.default
    let library = manager.urls(for: .libraryDirectory, in: .userDomainMask).first!
    let dir = library.appendingPathComponent(folder)
    try manager.removeItem(at: dir)
}

/**
 Delete contents in library folder

 - parameter folder: target folder

 - throws: throws an error
 */
private func deleteLibraryFolderContents(folder: String) throws {
    let manager = FileManager.default
    let library = manager.urls(for: FileManager.SearchPathDirectory.libraryDirectory, in: .userDomainMask)[0]
    let dir = library.appendingPathComponent(folder)
    let contents = try manager.contentsOfDirectory(atPath: dir.path)
    for content in contents {
        do {
            try manager.removeItem(at: dir.appendingPathComponent(content))
        } catch where ((error as NSError).userInfo[NSUnderlyingErrorKey] as? NSError)?.code == Int(EPERM) {
            // "EPERM: operation is not permitted". We ignore this.
            #if DEBUG

                print("Couldn't delete some library contents.")

            #endif
        }
    }
}

回答by Valentin Thomalla

It takes me a few hours, but this works for me! After the loadRequest, I make a reloadFromOrigin! So I force empty cache! [WKWebView loadRequest:request]; [WKWebView reloadFromOrigin];

我需要几个小时，但这对我有用！在 loadRequest 之后，我做了一个 reloadFromOrigin！所以我强制清空缓存！[WKWebView 加载请求：请求]；[WKWebView reloadFromOrigin];

回答by Durai Amuthan.H

It works for me

这个对我有用

 if #available(iOS 9.0, *) {
            let websiteDataTypes = NSSet(array: [WKWebsiteDataTypeDiskCache, WKWebsiteDataTypeMemoryCache])
            let date = NSDate(timeIntervalSince1970: 0)
            WKWebsiteDataStore.defaultDataStore().removeDataOfTypes(websiteDataTypes as! Set<String>, modifiedSince: date, completionHandler:{ })
        }
        else
        {
          NSURLCache.sharedURLCache().removeAllCachedResponses()
        }