失败了，因为IBInspectable的变量用于其他人的IBDesignable类

It was failing because the variables of IBInspectable are used in someone else's IBDesignable class

以下步骤解决了该问题:

The following steps resolved the issue:

1. 重命名课程
2. 清理项目.
3. 选择情节提要，转到编辑器"菜单，然后执行刷新所有视图"，或者选择自动刷新"视图；等待构建完成.