ios - 在单元格中加载时隐藏/显示@IBOUlet @IBAction

Question

我试图仅在某些值可用时让按钮显示。

@IBAction func instagramButtonHide(_ sender: Any) {
    if(self.thisLens.instagramURL.isEmpty){
        addInstagramButton.isHidden = true
    }else{
        let url = URL(string: thisLens.instagramURL)!
        UIApplication.shared.open(url, options: [:], completionHandler: nil)
    }
}

该代码有效，但前提是您单击它。所以我想让我们将它放在 viewDidAppear 中，以便它在 View 加载时加载，但由于它位于单元格中，所以我不能这样做。

因此，如果 instagramURL 的值为空，我不希望显示该按钮。

我觉得有一个简单的解决办法，但我找不到它。

@IBOutlet weak var addFacebookButton: UIButton!
@IBOutlet weak var shareButton: UIButton!

var thisLens: WordPressPost!


override func awakeFromNib() {
    super.awakeFromNib()
    // Initialization code


    addFacebookButton.isHidden = self.thisLens.facebookURL.isEmpty
}

override func setSelected(_ selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
}

@IBAction func favoriteButtonPressed(_ sender: UIButton) {

}

@IBAction func facebookButtonClicked(_ sender: Any) {
    let url = URL(string: thisLens.facebookURL)!
    UIApplication.shared.open(url, options: [:], completionHandler: nil)
}

还有另一个

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    var thisLens: WordPressPost!

    var numberOfPosts = posts.count
    if searchController.isActive {
        numberOfPosts = filteredPosts.count
    }
    if indexPath.row != numberOfPosts {
        var thisPost: WordPressPost
        if searchController.isActive {
            thisPost = filteredPosts[indexPath.row]
        }
        else {
             thisPost = posts[indexPath.row]
        }
        let cell = tableView.dequeueReusableCell(withIdentifier: "lensCell", for: indexPath) as! LensCell

        cell.thisLens = thisPost
        if thisPost.authorName == "" {
            cell.authorNameLabel.text = "No Author"
        }
        else {
            cell.authorNameLabel.text = thisPost.authorName
        }
        if thisPost.title == "" {
            cell.lensNameLabel.text = "No Title"
        }
        else {
            cell.lensNameLabel.text = thisPost.title
        }

        if thisPost.image != nil {
            cell.snapCodeImageView.image = thisPost.image
            cell.imageLoadingIndicator.stopAnimating()
        }
        else {
            cell.snapCodeImageView.image = nil
            cell.imageLoadingIndicator.startAnimating()
            downloadImage(url: URL(string: thisPost.imageURL)!, cellIndexPath: indexPath, wasSearchControllerActive: searchController.isActive, typingUID: currentTypingUID)
        }
        return cell
    }
    else {
        let cell = tableView.dequeueReusableCell(withIdentifier: "loadingCell", for: indexPath) as! LoadingCell
        cell.loadingIndicator.startAnimating()
        return cell
    }
}

Answer 1

然后在单元格的 awakeFromNib 内执行此操作

addInstagramButton.isHidden = self.thisLens.instagramURL == nil

或在cellForRowAt内

let item = ///
cell.addInstagramButton.isHidden = item.instagramURL == nil