Is anyone adding Sign in with Apple to their app?

How are you drawing the button? Have you made your own?

Unity's package contains a single small black button image with an icon and english text.

I need a bigger button with localised text. It's not clear to me what's actually allowed.

Do I just translate 'Sign in with Apple', or do Apple have specific strings that must be used? If so, where do I find them?

In terms of the font, it seems that it's called San Francisco, but the license states that it is solely to be used for creating mock-ups. So, can I use any font I choose that suits my game?

THE APPLE SAN FRANCISCO FONT IS TO BE USED SOLELY FOR CREATING MOCK-UPS OF USER INTERFACES TO BE USED IN SOFTWARE PRODUCTS RUNNING ON APPLE’S iOS, OS X OR tvOS OPERATING SYSTEMS, AS APPLICABLE.

 

Per design guideline, apple wants developers to use the system font with the button.

Unity has API to access the system font at runtime: https://docs.unity3d.com/ScriptReference/Font.CreateDynamicFontFromOSFont.html

If you use TextMeshPro, you can create font asset at runtime as well.
https://docs.unity3d.com/Packages/c...tml#TMPro_TMP_FontAsset_CreateFontAsset_Font_

 

Thanks for replying.

Have you got a link to the guideline you refer to?

You say the system font, but according to this there are many system fonts that can be used in an app's UI. If you are referring to one particular font, what's it called? When I list the fonts on an iOS device I don't see anything called 'system' or similar.

 

This:
https://developer.apple.com/design/human-interface-guidelines/sign-in-with-apple/overview/buttons/

Search "Use the system font for the title"

I am as clueless as you are, and I was just trying to help, but I know that at least Helvetica is usually the safest bet, as that font exists in older iOS and was the "system font" (i.e. the default font for any UI element for any app unless specified in UI builder) for a long time before San Francisco is introduced.

 

Thanks. I do appreciate that you're trying to help.

That link was very useful. The only thing I'm not sure about is font size. With a 44pt button (88px @2x) they say the font size should be 19pt - but that is tiny in Unity.

 

Just want to add that my app has now passed Apple submission.

Here's a screenshot to show what the Sign in with Apple button looks like.

 

Hey all,

I got great help from your discussion. So, I want to contribute bit even though you already figured out.
I got help from Unity and they advised to find the iOS Default System Font. It is involved to program Object-c. All thanks go to them.

Code (CSharp):

1. // Place it in Plugin/IOS/some.mm
2. // Of course you need define it in some.h, too.
3. char* GetDefaultSystemFontImpl()
4. {
5.     UIFont *font = [UIFont systemFontOfSize:10];
6.     NSString *fontName = font.fontName;
7.     NSLog(@"SYSTEM_FONT_INFO: %@", fontName);
8.     return strdup([fontName UTF8String]);
9. }
10.  

Code (CSharp):

1. // From C# for Unity
2.  
3. #if UNITY_IOS
4.     [DllImport("__Internal")]
5.     private static extern string GetDefaultSystemFontImpl();
6. #endif
7.  
8.     private const int SIZE_OS_FONT = 32;
9.     [SerializeField]
10.     private string _defaultFontName = "Helvetica";
11. ......
12.     // Start is called before the first frame update
13.     void Start()
14.     {
15.         if (_osFont == null)
16.         {
17. #if UNITY_EDITOR && UNITY_IOS
18.             _osFont = Font.CreateDynamicFontFromOSFont(_defaultFontName, SIZE_OS_FONT);
19. #elif UNITY_IOS
20.             _defaultFontName = GetDefaultSystemFontImpl();
21.             _osFont = Font.CreateDynamicFontFromOSFont(_defaultFontName, SIZE_OS_FONT);
22. #endif