fix test

Author: xster

shell/platform/darwin/ios/framework/Source/FlutterViewController.mm

@@ -482,7 +482,12 @@ - (UIView*)splashScreenFromStoryboard:(NSString*)name {
 }
 
 - (UIView*)splashScreenFromXib:(NSString*)name {
-  NSArray* objects = [[NSBundle mainBundle] loadNibNamed:name owner:self options:nil];
+  NSArray* objects = nil;
+  @try {
+    objects = [[NSBundle mainBundle] loadNibNamed:name owner:self options:nil];
+  } @catch (NSException* exception) {
+    return nil;
+  }
   if ([objects count] != 0) {
     UIView* view = [objects objectAtIndex:0];
     return view;

testing/scenario_app/ios/Scenarios/Scenarios/Info.plist

@@ -20,6 +20,8 @@
 	<string>1</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
 	<key>UIRequiredDeviceCapabilities</key>
 	<array>
 		<string>arm64</string>