WkWebView 清除缓存 ios8

WkWebView 清除缓存 ios8
iOS8系统
NSString *libraryDir = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask, YES)[0];
NSString *bundleId = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleIdentifier"];
NSString *webkitFolderInLib = [NSString stringWithFormat:@"%@/WebKit",libraryDir]; NSString *webKitFolderInCaches = [NSString stringWithFormat:@"%@/Caches/%@/WebKit",libraryDir,bundleId]; NSError *error;
[[NSFileManager defaultManager] removeItemAtPath:webKitFolderInCaches error:&error];
[[NSFileManager defaultManager] removeItemAtPath:webkitFolderInLib error:nil];