如何从自定义 TableViewCell 转到另一个 ViewController (Swift)

Question

我试图从 TableViewCell 导航到一个详细信息 VC，指示有关单元格上当前业务的详细信息。 下面是存根 tableiewMethods：

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("YelpTableBusinessCell", forIndexPath: indexPath) as! YelpTableBusinessCell
    var business:Business = Business(dictionary: businessArray[indexPath.row] as! NSDictionary)
    cell.business = business
    return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    businessToUseTVC = Business(dictionary: businessArray[indexPath.row] as! NSDictionary)
    performSegueWithIdentifier("businessToDetailVC", sender: view);

}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if let cell = sender as? YelpTableBusinessCell {
        if segue.identifier == "businessToDetailVC" {
            if let ivc = segue.destinationViewController as? AttractionsDetailViewController {
                ivc.businessToUse = self.businessToUseTVC
            }
        }
    }

}

我设置了两个断点，一个在prepareForSegue方法中，一个在didSelectRowAtIndexPath方法中

我在didSelectRowAtIndexPath初始化businessToUseVTC变量，但是当我运行应用程序时，当我在 AttractionsDetailVC 处时，其中包含这段代码，

func loadYelpInfo() {
        businessName.text = businessToUse.name
        let thumbImageViewData = NSData(contentsOfURL: businessToUse.imageURL!)
        thumbImage.image = UIImage(data: thumbImageViewData!)
        let reviewImageData = NSData(contentsOfURL: businessToUse.ratingImageURL!)
        reviewImage.image = UIImage(data: reviewImageData!)
        categories.text = businessToUse.categories
        reviews.text = "\(businessToUse.reviewCount!) Reviews"
        distanceLabel.text = businessToUse.distance
    }

代码中断，说在 DetailsVC 中设置的businessToUse为零。

任何帮助将不胜感激。

Answer 1

首先，确保您从 VIEWCONTROLLER 中按住 ctrl 拖动，而不是从单个单元格拖动。

其次，发件人不是YelpTablseBusinessCell类型，我相信这是您的问题。