参考にしたサイトをとりあえず貼って行く

[churabou]

4月17日(火)

• https://stackoverflow.com/questions/15184133/add-a-border-outside-of-a-uiview-instead-of-inside

• https://medium.com/eureka-engineering/%E3%83%81%E3%83%A3%E3%83%83%E3%83%88%E7%94%BB%E9%9D%A2%E3%81%AE%E5%AE%9F%E8%A3%85%E3%82%92%E6%A5%BD%E3%81%AB%E3%81%99%E3%82%8B-%E7%B6%BA%E9%BA%97%E3%81%AB%E4%BC%B8%E7%B8%AE%E3%81%99%E3%82%8B%E3%83%86%E3%82%AD%E3%82%B9%E3%83%88%E3%83%93%E3%83%A5%E3%83%BC%E3%81%AE%E4%BD%9C%E3%82%8A%E6%96%B9-5f7166977299

• https://qiita.com/glayash/items/25d54ff2c9d91f0b6673