使用方法： 1. Add 4 TStyleBook components to your form 2. Load your custom Windows style to the TStyleBook component and rename it to WinStyleBook 3. Load your custom Mac OS style to the TStyleBook component and rename it to MacStyleBook 4. Load your custom iOS style to the TStyleBook component and rename it to iOSStyleBook 5. Load your custom Android style to the TStyleBook component and rename it to AndroidStyleBook 6. At runtime, execute the following code 7. Set Form1.StyleBook = nil before running the application