After days of research and experiments, I have found a solution to manage sessions in WKWebView, This is a work around because I didn’t find any other way to achieve this, below are the steps:
First you need to create methods to set and get data in user defaults, when I say data it means NSData, here are the methods.
+(void)saveDataInNSDefault:(id)object key:(NSString *)key{
NSData *encodedObject = [NSKeyedArchiver archivedDataWithRootObject:object];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:encodedObject forKey:key];
[defaults synchronize];
}
+ (id)getDataFromNSDefaultWithKey:(NSString *)key{
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSData *encodedObject = [defaults objectForKey:key];
id object = [NSKeyedUnarchiver unarchiveObjectWithData:encodedObject];
return object;
}
For maintaining session on webview I made my webview and WKProcessPool singleton.
- (WKWebView *)sharedWebView {
static WKWebView *singleton;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
WKWebViewConfiguration *webViewConfig = [[WKWebViewConfiguration alloc] init];
WKUserContentController *controller = [[WKUserContentController alloc] init];
[controller addScriptMessageHandler:self name:@"callNativeAction"];
[controller addScriptMessageHandler:self name:@"callNativeActionWithArgs"];
webViewConfig.userContentController = controller;
webViewConfig.processPool = [self sharedWebViewPool];
singleton = [[WKWebView alloc] initWithFrame:self.vwContentView.frame configuration:webViewConfig];
});
return singleton;
}
- (WKProcessPool *)sharedWebViewPool {
static WKProcessPool *pool;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
pool = [Helper getDataFromNSDefaultWithKey:@"pool"];
if (!pool) {
pool = [[WKProcessPool alloc] init];
}
});
return pool;
}
In ViewDidLoad, I check if it’s not the login page and load cookies into HttpCookieStore from User Defaults so It will by pass authentication or use those cookies to maintain session.
if (!isLoginPage) {
[request setValue:accessToken forHTTPHeaderField:@"Authorization"];
NSMutableSet *setOfCookies = [Helper getDataFromNSDefaultWithKey:@"cookies"];
for (NSHTTPCookie *cookie in setOfCookies) {
if (@available(iOS 11.0, *)) {
[webView.configuration.websiteDataStore.httpCookieStore setCookie:cookie completionHandler:^{}];
} else {
// Fallback on earlier versions
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];
}
}
}
And, Load the request.
Now, we will maintain webview sessions using cookies, so on your login page webview, save cookies from httpCookieStore into user defaults in viewDidDisappear method.
- (void)viewDidDisappear:(BOOL)animated {
if (isLoginPage) { //checking if it’s login page.
NSMutableSet *setOfCookies = [Helper getDataFromNSDefaultWithKey:@"cookies"]?[Helper getDataFromNSDefaultWithKey:@"cookies"]:[NSMutableArray array];
//Delete cookies if >50
if (setOfCookies.count>50) {
[setOfCookies removeAllObjects];
}
if (@available(iOS 11.0, *)) {
[webView.configuration.websiteDataStore.httpCookieStore getAllCookies:^(NSArray<NSHTTPCookie *> * _Nonnull arrCookies) {
for (NSHTTPCookie *cookie in arrCookies) {
NSLog(@"Cookie: \n%@ \n\n", cookie);
[setOfCookies addObject:cookie];
}
[Helper saveDataInNSDefault:setOfCookies key:@"cookies"];
}];
} else {
// Fallback on earlier versions
NSArray *cookieStore = NSHTTPCookieStorage.sharedHTTPCookieStorage.cookies;
for (NSHTTPCookie *cookie in cookieStore) {
NSLog(@"Cookie: \n%@ \n\n", cookie);
[setOfCookies addObject:cookie];
}
[Helper saveDataInNSDefault:setOfCookies key:@"cookies"];
}
}
[Helper saveDataInNSDefault:[self sharedWebViewPool] key:@"pool"];
}
Note: Above method is tested for iOS 11 only, although I have written
fallback for lower versions also but didn’t test those.
Hope this solves your problems !!! :)
