can't use fonts

[huanmoon]

I'm trying to use a font from ttf file.
ImGuiIO& io = ImGui::GetIO();
io.Fonts -> AddFontFromFileTTF("misc/fonts/DroidSans.ttf", 1.0f, NULL, io.Fonts->GetGlyphRangesChineseFull());

I used AddFontFromFileTTF, but it doesn't work at all.
I'm sure that I didn't type the wrong name of the file

[ocornut]

You are not being specific with your question.

Have you carefully checked the Troubleshooting guide?
https://github.com/ocornut/imgui/blob/master/docs/FONTS.md#troubleshooting