Clearing UIWebView's Cache in Swift

Question

I have a UIWebView inside my app. This UIWebView needs to be reloaded fully (i.e. clear all cache of images/HTML/cookies etc.) every time when viewDidLoad.

Answer 1

Swift 4

func clear(cache: Bool, cookies: Bool) {
    if cache { clearCache() }
    if cookies { clearCookies() }
}

fileprivate func clearCache() {
    URLCache.shared.removeAllCachedResponses()
    URLCache.shared.diskCapacity = 0
    URLCache.shared.memoryCapacity = 0
}

fileprivate func clearCookies() {
    let cookieStorage = HTTPCookieStorage.shared

    guard let cookies = cookieStorage.cookies else { return }

    for cookie in cookies {
        cookieStorage.deleteCookie(cookie)
    }
}

If the desired outcome is to have a private browsing experience, you may also want to set the websiteDataStore property on your WKWebViewConfiguration object per the below.

    let configuration = WKWebViewConfiguration()
    configuration.websiteDataStore = WKWebsiteDataStore.nonPersistent()
    ...