Swift 中未调用委托

Question

我不明白为什么我的委托没有被调用。这是我定义协议并调用委托的地方：

protocol CommentRatingViewControllerDelegate: class {
    func didCommentOrRatePost(updatedRating: Bool, addedComment:Bool)
}
class CommentRatingViewController: UIViewController, UITextViewDelegate {
    weak var delegate:CommentRatingViewControllerDelegate?
...

@IBAction func saveRatingComment(_ sender: Any) {
        var updatedRating = false
        var addedComment = false
        rating = ratingView.rating
        if rating != 0.0 {
            saveRating(articleID: post.articleID, userID: post.userID)
            updatedRating = true
        }
        if commentsTextView.text != "" {
        saveComment(articleID: post.articleID, userID: post.userID, comment: commentsTextView.text!)
        addedComment = true
    }
    self.delegate?.didCommentOrRatePost(updatedRating: updatedRating, addedComment: addedComment)
    close()
}

..... 这里是符合委托协议的地方：

extension PostDetailViewController: CommentRatingViewControllerDelegate {
    func didCommentOrRatePost(updatedRating: Bool, addedComment: Bool) {
        if updatedRating == true || addedComment == true {
            networkingState = .searching
            if updatedRating {
                getRating(articleID: post.articleID)
            }
            if addedComment {
                post.numberOfComments += post.numberOfComments
            }
            networkingState = .finishedSearching
            tableView.reloadData()
        }
    }
}

Answer 1

当你遵守一个协议的时候，如果你想调用委托的方法，仅仅让你的class遵守协议是不够的，你还需要将委托设置为self在 class.

里面

class CommentRatingViewController: UIViewController, UITextViewDelegate {
    override func viewDidLoad() {
        self.delegate = self
    }
}

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