iOS: impl font & hint font for input

doric-iOS/Example/Example/AppDelegate.m

@@ -35,6 +35,7 @@ - (void)localeChanged {
 
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     // Override point for customization after application launch.
+    NSArray<NSString *> *fonts = [UIFont familyNames];
 
     [[NSNotificationCenter defaultCenter] addObserver:self
                                              selector:@selector(localeChanged)

doric-iOS/Example/Example/Info.plist

@@ -29,6 +29,8 @@
 	<string>Scan QR Code</string>
 	<key>UIAppFonts</key>
 	<array>
+		<string>DINPro.ttf</string>
+		<string>Hanabi.ttf</string>
 		<string>iconfont.ttf</string>
 	</array>
 	<key>UILaunchStoryboardName</key>