Fix warning.

Author: 0x0c

Example/M2DWebViewController/M2DViewController.m

@@ -39,7 +39,7 @@ - (IBAction)show:(id)sender
 	else {
 		url = [NSURL URLWithString:@"https://github.com/0x0c/M2DWebViewController"];
 	}
-	M2DWebViewController *viewController = [[M2DWebViewController alloc] initWithURL:url type:M2DWebViewTypeUIKit];
+	M2DWebViewController *viewController = [[M2DWebViewController alloc] initWithURL:url type:M2DWebViewTypeWebKit];
 	viewController.delegate = self;
 	[self.navigationController pushViewController:viewController animated:YES];
 }
@@ -108,6 +108,11 @@ - (BOOL)textFieldShouldReturn:(UITextField *)textField
 
 #pragma mark - M2DWebViewControllerDelegate
 
+- (void)m2d_webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
+{
+	decisionHandler(WKNavigationActionPolicyAllow);
+}
+
 - (void)m2d_webViewDidStartLoad:(UIWebView *)webView
 {
 	NSLog(@"hoge");

M2DWebViewController.podspec

@@ -9,7 +9,7 @@
 
 Pod::Spec.new do |s|
   s.name             = "M2DWebViewController"
-  s.version          = "0.2.1"
+  s.version          = "0.2.2"
   s.summary          = "Simple built-in web view controller."
   s.homepage         = "https://github.com/0x0c/M2DWebViewController"
   s.license          = 'MIT'

Pod/Classes/M2DWebViewController/M2DWebViewController.m

@@ -180,8 +180,10 @@ - (void)setToolbarHidden:(BOOL)toolbarHidden
 - (WKWebView * _Nullable)webView:(WKWebView * _Nonnull)webView createWebViewWithConfiguration:(WKWebViewConfiguration * _Nonnull)configuration forNavigationAction:(WKNavigationAction * _Nonnull)navigationAction windowFeatures:(WKWindowFeatures * _Nonnull)windowFeatures
 {
 	if ([self.delegate respondsToSelector:@selector(m2d_webView:createWebViewWithConfiguration:forNavigationAction:windowFeatures:)]) {
-		[self.delegate m2d_webView:webView createWebViewWithConfiguration:configuration forNavigationAction:navigationAction windowFeatures:windowFeatures];
+		return [self.delegate m2d_webView:webView createWebViewWithConfiguration:configuration forNavigationAction:navigationAction windowFeatures:windowFeatures];
 	}
+	
+	return nil;
 }
 
 - (void)webViewDidClose:(WKWebView * _Nonnull)webView
@@ -223,15 +225,19 @@ - (void)webView:(WKWebView * _Nonnull)webView runJavaScriptTextInputPanelWithPro
 - (BOOL)webView:(WKWebView * _Nonnull)webView shouldPreviewElement:(WKPreviewElementInfo * _Nonnull)elementInfo
 {
 	if ([self.delegate respondsToSelector:@selector(m2d_webView:shouldPreviewElement:)]) {
-		[self.delegate m2d_webView:webView shouldPreviewElement:elementInfo];
+		return [self.delegate m2d_webView:webView shouldPreviewElement:elementInfo];
 	}
+	
+	return NO;
 }
 
 - (UIViewController * _Nullable)webView:(WKWebView * _Nonnull)webView previewingViewControllerForElement:(WKPreviewElementInfo * _Nonnull)elementInfo defaultActions:(NSArray<id <WKPreviewActionItem>> * _Nonnull)previewActions
 {
 	if ([self.delegate respondsToSelector:@selector(m2d_webView:previewingViewControllerForElement:defaultActions:)]) {
-		[self.delegate m2d_webView:webView previewingViewControllerForElement:elementInfo defaultActions:previewActions];
+		return [self.delegate m2d_webView:webView previewingViewControllerForElement:elementInfo defaultActions:previewActions];
 	}
+	
+	return nil;
 }
 
 - (void)webView:(WKWebView * _Nonnull)webView commitPreviewingViewController:(UIViewController * _Nonnull)previewingViewController