Xóa cache in ios

URLCache.shared.removeAllCachedResponses()
URLCache.shared.diskCapacity = 0
URLCache.shared.memoryCapacity = 0

if let cookies = HTTPCookieStorage.shared.cookies { 
    for cookie in cookies {
        HTTPCookieStorage.shared.deleteCookie(cookie)
    }
}

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)
    }
}

Lưu trữ dưới cache in IOS

static func Sizefont_saveCache(size:Float){

        let defaults = UserDefaults.standard

        defaults.set(size, forKey: sizeFontKeyConstant)

    }

    

    static func Sizefont_readCache() -> Float{

        let defaults = UserDefaults.standard

        let size = defaults.float(forKey:sizeFontKeyConstant)

        if size != 0 {

            return size

        }

        return 0.5

    }