通过自定义UITableViewCell中的按钮执行搜索 [英] Performing a segue from a button within a custom UITableViewCell
问题描述
我想通过自定义UITableViewCell中的按钮执行搜索,但是当我按下该按钮时,我不知道如何访问单元格的内容.我意识到可以通过didSelectRowAtIndexPath完成此操作,但是我有该方法执行另一项功能,并且我想使用在表格单元格中创建的按钮.
I want to perform a segue from a button within a custom UITableViewCell, but I don't know how to access the cell's contents when I push that button. I realize that this could be accomplished through didSelectRowAtIndexPath, however I have that method performing another function, and I would like to use the button I have created within the table cell.
这是我遇到问题的表演方法:
Here is my perform segue method I'm having trouble with:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
if segue.identifier == "showComments"
{
let vc:CommentOnPostViewController = segue.destinationViewController as CommentOnPostViewController
var buttonPosition:CGPoint = sender?.convertPoint(CGPointZero, toView: self.feed) as CGPoint!
var path:NSIndexPath = self.feed.indexPathForRowAtPoint(buttonPosition) as NSIndexPath!
var postToCommentOn:PFObject = feedList[path.row] as PFObject
vc.post = postToCommentOn as PFObject
}
}
我在显示按钮时标记单元格中的按钮,并对其进行目标操作:
I tag the button in the cell when displaying it, and give it a target action:
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
// There is code that goes here for creating and displaying the cell.
cell.commentButton.tag = indexPath.row
cell.commentButton.addTarget(self, action: "addComment", forControlEvents: UIControlEvents.TouchUpInside)
}
这是按下按钮时调用的动作:
Here is the action that is called when pressing the button:
func addComment()
{
self.performSegueWithIdentifier("showComments", sender: self)
}
感谢您的帮助.谢谢!
推荐答案
使用Method创建一个协议,该协议将由TableViewController上定义的CustomCell的Delegate调用
Create a Protocol with the Method, that will be called by the CustomCell's Delegate, defined on your TableViewController
//Pass any objects, params you need to use on the
//segue call to send to the next controller.
protocol MyCustomCellDelegator {
func callSegueFromCell(myData dataobject: AnyObject)
}
现在在UITableViewController上使用协议
Now use the Protocol on your UITableViewController
class MyTableViewController : UITableViewController, MyCustomCellDelegator {
//The usual Defined methods by UIViewController and UITableViewController
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
//Set the CustomCell new Delegate
var cell = tableView.dequeueReusableCellWithIdentifier(customIdentifier) as MyCustomCell
cell.delagete = self
return cell
}
//MARK: - MyCustomCellDelegator Methods
func callSegueFromCell(myData dataobject: AnyObject) {
//try not to send self, just to avoid retain cycles(depends on how you handle the code on the next controller)
self.performSegueWithIdentifier("showComments", sender:dataobject )
}
}
在自定义单元格上定义代表,在新建"按钮内定义代表函数.
Define the Delegate on your Custom Cell and the Call inside your New Button the Delegate Function.
class MyCustomCell : UITableViewCell {
var delegate:MyCustomCellDelegator!
@IBOutlet weak var myButton:UIButton
@IBAction func buttonPressed(sender:AnyObject){
var mydata = "Anydata you want to send to the next controller"
if(self.delegate != nil){ //Just to be safe.
self.delegate.callSegueFromCell(mydata)
}
}
}
希望这可以使您理解并实现代码中的内容清晰明了.
Hopefully this can be clean and clear for you to understand and implement in your code.
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