CODEWITHSUNDEEP
xcodeswiftuibuttonsegue
aspnet82
aspnet82

Reputation: 167

UIButton Triggering Segue

I am trying to link together 2 controllers with segue. I have a view controller with 6 button that after the click on a button will show a tableviewcontroller. I made all the link, give the identifier to segue etc.

in the tableviewcontroller there is an array that should show filtered results depending on which button trigger the segue

How should I write the prepareforsegue method?

This is what i am doing

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if segue.identifier == "chooseBrand" {

        if sender?.tag == 1 {
            let destinationController = segue.destinationViewController as! SelectionTableViewController
            let numberOfCameras = destinationController.Camera.count

}

the problem is that i receive this error message

"Could not cast value of type 'UINavigationController' (0x10a0ef588) to 'myApp.SelectionTableViewController' (0x108658b90)."

How can I define the content of the tableview in the selectiontableviewcontroller depending on which button is pressed?

Thanks a lot for any kind of help :)

Upvotes: 2

Views: 1614

Answers (1)

ClockWise
ClockWise

Reputation: 1519

What exactly is the sender here? The error is saying that sender with tag = 1 is not a SelectionTableViewController.

Anyway, what you could do is simply to connect each button to the same action outlet method and the have a generic segue between the two controllers. When you then hit button A, B, C, D, E, or F you simply check their tag(or store them as variables in your controller class) and send whatever you want to the controller. It's important that the segue you have between the controllers is between two controllers and not a segue from each UIButton the other controller. In the example below I assume you store each of the six UIButton as class variables.

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "segueFromFirstToSecond" {
        let destinationController = segue.destinationViewController as!   SelectionTableViewController
        if sender = button1 {
            let numberOfCameras = destinationController.Camera.count
        } else if sender == button2 {
            let numberOfCameras = destinationController.Camera.count
        }          
}

@IBAction func buttonPressed(sender: AnyObject) {
    performSegueWithIdentifier(segueProfileToPul, sender: sender)
}

Connect all buttons to the buttonPressed(). I don't think this line let numberOfCameras = destinationController.Camera.countworks since the SelectionTableViewController is not instantiated yet and thus has no values in its variables (I think). What you are looking for are probably setting this value so destinationController.Camera.count = someValue. Maybe I'm wrong though.

Edit I uploaded a test project showing what I mean. Pay attention to the connections I've made in storyboard. Download here

Upvotes: 2

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