Swift-IBACTION如何执行搜寻

Question

I can pass data (authorID) to a view using DidSelectRowAtIndexPath successfully. Now I try to perform the same segue with an Button IBACTION, But I couldn't find a way to perform it. I couldn't find a way to use NSIndexPath inside INACTION.

 override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
       performSegueWithIdentifier("ArticleSegue", sender: indexPath) 
       tableView.deselectRowAtIndexPath(indexPath, animated: true)
 }

 override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "ArticleSegue"{
            let toView = segue.destinationViewController as! ArticleTableViewController
            let indexPath = sender as! NSIndexPath
            let authorid = articleList?[indexPath.row]["author_id"].int!
            toView.authorid = authorid            
}

@IBAction func favButtonDidTouch(sender: AnyObject) {
 //???
}

Answer 1

If you have defined the segue as a manual segue between two view controllers, you can just call

performSegueWithIdentifier("ManualSegue", sender: self)

Another possibility is that you define the segue from the button itself to the target view controller. In that case, it happens automatically; you need neither an IBAction nor a call to performSegueWithIdentifier .

Answer 2

One way you could solve it, as you just need the row of the cell (here indexPath.row for your articleList), is to give your favButtons a tag (if you don't use the UIView-tags for something else).

This means when you configure your cell in tableView:cellForRowAtIndexPath: you just say:

cell.favButton.tag = indexPath.row

then in your IBAction, create an NSIndexPath with that tag and call the segue:

let indexPath = NSIndexPath(forRow: sender.tag, inSection: 0)
self.performSegueWithIdentifier("ManualSegue", sender: indexPath)

Make sure the sender in this case is an UIView (here UIButton).

Answer 3

有一种方法

performSegueWithIdentifier("ArticleSegue", sender:self)

Answer 4

Assign the Row to the tag of the UIButton in your

override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
    // Setup cell etc..
    ....
    cell.favButton.tag = indexPath.row
    ...
    return cell
}

Then in your action method, note the change in the method from AnyObject to UIButton! so you can access the tag property.

@IBAction func favButtonDidTouch(sender: UIButton!) {
  performSegueWithIdentifier("ArticleSegue", sender:NSIndexPath(forRow: sender.tag, inSection: 0))
}