flutter vscode創建objc工程

通過vscode創建flutter工程時，默認創建的是swift項目工程，如果想要修改，可以通過vscode設置默認創建語言

1. Open vscode settings. Under User Settings, click on Extensions.
2. Open Dart & Flutter
3. Scroll down till you see Flutter Create Android Language to change it to kotlin and Flutter Create IOSLanguage to change it to swift

參考地址：https://stackoverflow.com/a/56161642