fix(ios): Fix autofocus on iOS 12.2 (#334)

closes #330

Author: jcesarmobile

src/ios/CDVWKWebViewEngine.m

@@ -269,9 +269,7 @@ - (void)pluginInitialize
         [wkWebView.configuration.userContentController addScriptMessageHandler:(id < WKScriptMessageHandler >)self.viewController name:CDV_BRIDGE_NAME];
     }
 
-    //if (![settings cordovaBoolSettingForKey:@"KeyboardDisplayRequiresUserAction" defaultValue:NO]) {
     [self keyboardDisplayDoesNotRequireUserAction];
-    //}
 
     if ([settings cordovaBoolSettingForKey:@"KeyboardAppearanceDark" defaultValue:NO]) {
         [self setKeyboardAppearanceDark];
@@ -304,9 +302,15 @@ - (void)pluginInitialize
 - (void) keyboardDisplayDoesNotRequireUserAction {
     Class class = NSClassFromString(@"WKContentView");
     NSOperatingSystemVersion iOS_11_3_0 = (NSOperatingSystemVersion){11, 3, 0};
+    NSOperatingSystemVersion iOS_12_2_0 = (NSOperatingSystemVersion){12, 2, 0};
+    char * methodSignature = "_startAssistingNode:userIsInteracting:blurPreviousNode:changingActivityState:userObject:";
+
+    if ([[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion: iOS_12_2_0]) {
+        methodSignature = "_elementDidFocus:userIsInteracting:blurPreviousNode:changingActivityState:userObject:";
+    }
 
     if ([[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion: iOS_11_3_0]) {
-        SEL selector = sel_getUid("_startAssistingNode:userIsInteracting:blurPreviousNode:changingActivityState:userObject:");
+        SEL selector = sel_getUid(methodSignature);
         Method method = class_getInstanceMethod(class, selector);
         IMP original = method_getImplementation(method);
         IMP override = imp_implementationWithBlock(^void(id me, void* arg0, BOOL arg1, BOOL arg2, BOOL arg3, id arg4) {