url - 获取 IndexPath for - UITextView 应与 indexPath 处的 URL 交互

Question

我有一个收藏视图。里面会显示用户名，以及如果他签到了一个地方和他身边的朋友。我将用户名用作 TextView，并为 2 种类型的文本（朋友和签入）分配 URL。它可以正常工作，只有一个问题。

当用户点击链接时，我无法找到获取 IndexPath 的方法。它将发送到链接并触发该功能，但我无法获取 indexPath。我到处找，但没有关于它的文档。永远欠你一点帮助，因为我一直在为此苦苦挣扎。

这是使用户名显示2个链接的功能：

  //GET THE INDEX PATH FOR ASSIGNMENT TO THE LINKS ??
    func assignNameFriendsAndCheckIn(name: String, checkIn: String, friends: String, cellName: UITextView) {

        let nameSurname = name
        let checkIn = checkIn
        var string = name
        let friendsString = friends

        string = "\(nameSurname)\(checkIn)\(friendsString)"

        let attributedString = NSMutableAttributedString(string: string)

        attributedString.addAttribute(NSAttributedString.Key.font, value: UIFont.boldSystemFont(ofSize: 14), range: (string as NSString).range(of: nameSurname))

        attributedString.addAttribute(NSAttributedString.Key.font, value: UIFont.systemFont(ofSize: 11), range: (string as NSString).range(of: checkIn))
        attributedString.addAttribute(NSAttributedString.Key.font, value: UIFont.systemFont(ofSize: 11), range: (string as NSString).range(of: friendsString))

        attributedString.addAttribute(NSAttributedString.Key.link, value: "checkIn", range: (string as NSString).range(of: checkIn))
        cellName.linkTextAttributes = [NSAttributedString.Key.foregroundColor:UIColor.black, NSAttributedString.Key.font: UIFont.systemFont(ofSize: 11)]
        attributedString.addAttribute(NSAttributedString.Key.link, value: "friends", range: (string as NSString).range(of: friendsString))
        cellName.linkTextAttributes = [NSAttributedString.Key.foregroundColor:UIColor.black, NSAttributedString.Key.font: UIFont.systemFont(ofSize: 11)]

        cellName.attributedText = attributedString
    }

这就是我捕获链接的方式：

func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {

    if URL.absoluteString == "checkIn" {
        print("Check In")
        return true
    } else if URL.absoluteString == "friends" {
        print("Friends")
        return true
    } else {
        print("No Urls set")
        return false
    }

}

标签： urlswift3swift4uitextviewnsattributedstring

Answer 1

根据 Larme 给我的建议，我想出了这个，并且它有效。

在 didSelectRow 中，我分配了一个点击手势，然后我使用链接创建了 NSAttributedString。在第二部分中，我在 collectionView 中检索手势点并获取 indexPath。现在将分配操作。因为第一次单击将在 String 而不是 Label 上，所以 indexPath 将被延迟分配。所以我用 DispatchQueue 延迟分配：

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionCell", for: indexPath) as! CollectionCell
    cell.nameSurname.delegate = self

    ................................................

    cell.nameSurname.isUserInteractionEnabled = true
    cell.nameSurname.tag = (indexPath.section * 100) + indexPath.item
    let tapName : UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(didTapName))
    cell.nameSurname.addGestureRecognizer(tapName)
    tapName.delegate = self

    assignNameLocationAndCheckIn(name: nameSurname, checkIn: checkIn, city: city, date: date, friends: friendsString, cellName: cell.nameSurname, postID: cell.postID)
}

这是计算 indexPath 的函数（urlIndexPath 只是一个变量）：

@objc func didTapName(sender: UITapGestureRecognizer) {
        let pointInCollectionView = sender.location(in: collectionView)
        let indexPath = collectionView?.indexPathForItem(at: pointInCollectionView)
        urlIndexPath = indexPath!.item
        print("Name was tapped: \(indexPath!.item) : \(posts[(indexPath?.row)!].postID!)")
    }

最后我使用的是 indexPath：

//MARK: 
    func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {

        if URL.absoluteString == "checkIn" {
            print("Check In")
            checkInText()
            return true
        } else if URL.absoluteString == "friends" {
            print("Friends")
            tagFriends()
            return true
        } else {
            print("No Urls set")
            return false
        }

    }

    //MARK: 
    func checkInText() {
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
            print("Send to: \(self.urlIndexPath)")
        }

    }

    //MARK: 
    func tagFriends() {
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
            print("Send to Friends: \(self.urlIndexPath)")
        }

    }