How to remove cache in WKWebview?

Question

Updated Swift 5 version:

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

---

Swift version:

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:

   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()
    }

In iOS 9

// 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
}];

Remove Cache and Cookies

# 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:

import WebKit
...
WKWebview.clean()

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:

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

Hope this helps.