WKWebView 的清理缓存

oc：

// 清理clearWKWebViewCache缓存
- (void)clearCache {
    if ([[[UIDevice currentDevice]systemVersion]intValue ] >= 9.0) {
        NSArray * types =@[WKWebsiteDataTypeMemoryCache,WKWebsiteDataTypeDiskCache]; // 9.0之后才有的
        NSSet *websiteDataTypes = [NSSet setWithArray:types];
        NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
        [[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:^{
        }];
    }else{
        NSString *libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask,YES) objectAtIndex:0];
        NSString *cookiesFolderPath = [libraryPath stringByAppendingString:@"/Cookies"];
        NSLog(@"%@", cookiesFolderPath);
        NSError *errors;
        [[NSFileManager defaultManager] removeItemAtPath:cookiesFolderPath error:&errors];
    }
}

swift:

// MARK: - 清空缓存
    func ClearCache() {
        let dateFrom: NSDate = NSDate.init(timeIntervalSince1970: 0)
        if #available(iOS 9.0, *) {
            let websiteDataTypes: NSSet = WKWebsiteDataStore.allWebsiteDataTypes()
            WKWebsiteDataStore.defaultDataStore().removeDataOfTypes(websiteDataTypes as! Set, modifiedSince: dateFrom) {
                print("清空缓存完成")
            }
        } else {
              let libraryPath = NSSearchPathForDirectoriesInDomains(.LibraryDirectory, .UserDomainMask, true)[0]
            let cookiesFolderPath = libraryPath.stringByAppendingString("/Cookies")
            let errors: NSError
            try? NSFileManager.defaultManager().removeItemAtPath(cookiesFolderPath)
        }
    }