fix(iOS): clearAll(true) correctly clears WebKit cookies (#23)

Author: jacobmllr95

ios/RNCookieManagerIOS/RNCookieManagerIOS.m

@@ -1,8 +1,8 @@
-/**		
-  * Copyright (c) Joseph P. Ferraro		
-  *		
-  * This source code is licensed under the MIT license found in the		
-  * LICENSE file here: https://github.com/joeferraro/react-native-cookies/blob/master/LICENSE.md.		
+/**
+  * Copyright (c) Joseph P. Ferraro
+  *
+  * This source code is licensed under the MIT license found in the
+  * LICENSE file here: https://github.com/joeferraro/react-native-cookies/blob/master/LICENSE.md.
   */
 
 #import "RNCookieManagerIOS.h"
@@ -181,22 +181,14 @@ -(NSString *)getDomainName:(NSURL *) url
     if (useWebKit) {
         if (@available(iOS 11.0, *)) {
             dispatch_async(dispatch_get_main_queue(), ^(){
-                WKHTTPCookieStore *cookieStore = [[WKWebsiteDataStore defaultDataStore] httpCookieStore];
-                [cookieStore getAllCookies:^(NSArray<NSHTTPCookie *> *allCookies) {
-                    for(NSHTTPCookie *currentCookie in allCookies) {
-                        // Uses the NSHTTPCookie directly has no effect, nor deleted the cookie nor thrown an error.
-                        // Create a new cookie with the given values and delete this one do the work.
-                        NSMutableDictionary<NSHTTPCookiePropertyKey, id> *cookieData =  [NSMutableDictionary dictionary];
-                        [cookieData setValue:currentCookie.name forKey:NSHTTPCookieName];
-                        [cookieData setValue:currentCookie.value forKey:NSHTTPCookieValue];
-                        [cookieData setValue:currentCookie.domain forKey:NSHTTPCookieDomain];
-                        [cookieData setValue:currentCookie.path forKey:NSHTTPCookiePath];
-
-                        NSHTTPCookie *newCookie = [NSHTTPCookie cookieWithProperties:cookieData];
-                        [cookieStore deleteCookie:newCookie completionHandler:^{}];
-                    }
-                    resolve(nil);
-                }];
+                // https://stackoverflow.com/questions/46465070/how-to-delete-cookies-from-wkhttpcookiestore#answer-47928399
+                NSSet *websiteDataTypes = [NSSet setWithArray:@[WKWebsiteDataTypeCookies]];
+                NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
+                [[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes
+                                                        modifiedSince:dateFrom
+                                                        completionHandler:^() {
+                                                            resolve(nil);
+                                                        }];
             });
         } else {
             reject(@"", NOT_AVAILABLE_ERROR_MESSAGE, nil);