代码如下：
#pragma mark - xcode注释标记(顶部有线)
// MARK: - A section heading or a comment with a separator line above
// TODO: - A to-do item with a separator line above
// FIXME: - A bug fix reminder with a separator line above
// !!!: - A red flag with separator line above
// ???: - A question with a separator line above
#pragma mark - xcode注释标记（底部有线）
// MARK: A section heading or a comment with a separator line below -
// TODO: A to-do item with a separator line below -
// FIXME: A bug fix reminder with a separator line below -
// !!!: A red flag with a separator line below -
// ???: A question with a separator line below -
#pragma mark - xcode注释标记（顶部和底部都有线）
// MARK: - A section heading or a comment with a separator line below -
// TODO: - A to-do item with a separator line below -
// FIXME: - A bug fix reminder with a separator line below -
// !!!: - A red flag with a separator line below -
// ???: - A question with a separator line below -
效果图如下：
Xcode Dark
Xcode Light
