58

有人使用过WKWebview并试图清除缓存吗？如果是，怎么办？有什么例子吗？

PS：正常的 NSURLCache 不起作用。

4

14 回答 14

68

更新 Swift 5 版本：

WKWebsiteDataStore.default().removeData(ofTypes: [WKWebsiteDataTypeDiskCache, WKWebsiteDataTypeMemoryCache], modifiedSince: Date(timeIntervalSince1970: 0), completionHandler:{ })

斯威夫特版本：

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()
}

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()
    }
于 2015-12-20T00:47:59.553 回答
64

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
}];
于 2015-09-10T00:42:22.327 回答
20

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
            }
        }  
    }
}

例子：

import WebKit
...
WKWebview.clean()
于 2019-05-28T08:32:27.607 回答
6

我可以通过让我的 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，每当它检测到带有 2 次触摸的双击时，我都会运行以下命令：

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

希望这可以帮助。

于 2015-09-04T20:08:49.000 回答
4

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. 使用 NSURLCache 删除缓存的方式与您在 UIWebView 上使用的方式相同。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

下次创建 WKWebView 时，应该清除缓存。

ShingoFukuyama/WKWebViewTips

于 2014-11-26T14:52:58.963 回答
2

斯威夫特5

URLCache.shared.removeAllCachedResponses()
于 2020-11-29T15:01:29.753 回答
2

这个单线应该通过删除所有 WKWebView 数据来解决问题。

WKWebsiteDataStore.default().removeData(ofTypes: WKWebsiteDataStore.allWebsiteDataTypes(), modifiedSince: Date(timeIntervalSince1970: 0), completionHandler: {})
于 2021-09-22T21:34:48.940 回答
2

工作
Swift 3. 版本。
对于旧版本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 를 삭제하는 대신 contents 를 삭제하는 이유?
            // MainVC 가 호출되면 cache, cookie가 발생하므로 로딩시 확인된 cache, cookie 폴더의
            // contents 에 대해서만 삭제 진행.

            // 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
        }
    }
}
于 2017-03-19T08:26:44.467 回答
2

iOS 9.0 及更高版本类似：

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
  })
})
于 2016-10-20T09:40:38.310 回答
1

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()
        }
于 2016-01-28T14:33:48.090 回答
1

@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()
    }
}
于 2017-03-16T18:58:53.580 回答
1

获取缓存字典路径并删除

   NSFileManager *fileManager = [NSFileManager defaultManager];
   NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
  NSError *error;
  BOOL success = [fileManager removeItemAtPath:documentsPath error:&error];
    NSLog(@"%d",success);
于 2019-06-11T10:45:18.800 回答
1 
private func deleteCache(){
        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()
        }
    }
于 2020-04-18T05:09:37.670 回答
1

这需要我几个小时，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 loadRequest:request]; [WKWebView reloadFromOrigin];

于 2017-09-17T07:53:28.590 回答