Use tmpWindow and hide on close

Author: NiklasMerz

src/ios/CDVWKInAppBrowser.m

@@ -80,6 +80,11 @@ - (void)close:(CDVInvokedUrlCommand*)command
         NSLog(@"IAB.close() called but it was already closed.");
         return;
     }
+    
+    // Set tmpWindow to hidden to make main webview responsive to touch again
+    // https://stackoverflow.com/questions/4544489/how-to-remove-a-uiwindow
+    self->tmpWindow.hidden = YES;
+    
     // Things are cleaned up in browserExit.
     [self.inAppBrowserViewController close];
 }
@@ -314,17 +319,18 @@ - (void)show:(CDVInvokedUrlCommand*)command withNoAnimate:(BOOL)noAnimate
     dispatch_async(dispatch_get_main_queue(), ^{
         if (weakSelf.inAppBrowserViewController != nil) {
             float osVersion = [[[UIDevice currentDevice] systemVersion] floatValue];
-            if (!self->tmpWindow) {
+            __strong __typeof(weakSelf) strongSelf = weakSelf;
+            if (!strongSelf->tmpWindow) {
                 CGRect frame = [[UIScreen mainScreen] bounds];
                 if(initHidden && osVersion < 11){
                    frame.origin.x = -10000;
                 }
-                self->tmpWindow = [[UIWindow alloc] initWithFrame:frame];
+                strongSelf->tmpWindow = [[UIWindow alloc] initWithFrame:frame];
             }
             UIViewController *tmpController = [[UIViewController alloc] init];
 
-            [self->tmpWindow setRootViewController:tmpController];
-            [self->tmpWindow setWindowLevel:UIWindowLevelNormal];
+            [strongSelf->tmpWindow setRootViewController:tmpController];
+            [strongSelf->tmpWindow setWindowLevel:UIWindowLevelNormal];
 
             if(!initHidden || osVersion < 11){
                 [self->tmpWindow makeKeyAndVisible];