Swift Dynamic Cast Failed

I determined that the problem was actually coming from incorrectly connecting the playlistImageView outlets. For anyone else struggling with a similar problem, I solved this by checking the connections tab (next to size and attributes tabs) and noticing that a playlistImageView had not been configured correctly

Hi Pasan Premaratne and everybody else. I see what you mean about having linked it to the view rather than the image view. I delete this link then ctrl drag from gesture recognizer to the placeholder. When I do this the drop down that appears is headlined "Outlets" with only one option of "delegate". Why is this? I can't get past this point.

Never mind. I figured out how to do it by ctrl clicking and dragging from the option box that appears then. All works so far. AWESOME!!!!!!!! (I'm a little bit excited as I was 3 seconds away from crying in a corner somewhere). Peace.

Had the same issue but got it to work in the end! Apple keep upgrading Xcode and changing swift syntax, so its not Pasan's fault. All you need to do is add a bang: "!" right after UIImageView like this Solution: let playlistImageView = sender!.view as! UIImageView!

and voila !

Can you post the rest of the code in that Controller, please?

Did you check what object sender is before casting it's view as an UIImageView?

In that step I think that we first made sure that sender is one of our image views by checking it's segue identifier... So in other words do they all have the segue identifier that you ask for?

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "showPlaylistDetailSegue" {

            let playlistImageView = sender!.view as UIImageView
            if let index = find(playlistArray, playlistImageView) {
                let playlistDetailController = segue.destinationViewController as PlaylistDetailViewController
                playlistDetailController.playlist = Playlist(index: index)
            }
        }
    }

happening for me and my controller is connected correctly. Does anyone have a fix please?

soon as this code is added the app crashes and complains about casting

works fine before this. Any ideas anyone on this?

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

      if segue.identifier == "showPlaylistDetailSegue" {

          let playlistImageView = sender!.view as UIImageView

            if let index = find(playlistArray, playlistImageView) {


               let playListDetailController = segue.destinationViewController as PlaylistDetailViewController

               playListDetailController.playlist = Playlist(index: index)

           }

       }

   }

PRASAD...please help your code has been copied correctly but this is the issue its been copied therefore making it difficult to debug. As soon as the above code is added the app falls down which means everything was fine up until this video with downcastinf to UIIMAGEVIEW and adding the optional binding

unable to progress onto the next video and very frustrating

libswiftCore.dylib`swift_dynamicCastObjCClassUnconditional: 0x103510620: pushq %rbp 0x103510621: movq %rsp, %rbp 0x103510624: pushq %rbx 0x103510625: pushq %rax 0x103510626: movq %rsi, %rcx 0x103510629: movq %rdi, %rbx 0x10351062c: xorl %eax, %eax 0x10351062e: testq %rbx, %rbx 0x103510631: je 0x10351064c ; swift_dynamicCastObjCClassUnconditional + 44 0x103510633: movq 0x82756(%rip), %rsi ; "isKindOfClass:" 0x10351063a: movq %rbx, %rdi 0x10351063d: movq %rcx, %rdx 0x103510640: callq 0x1035131ca ; symbol stub for: objc_msgSend 0x103510645: testb %al, %al 0x103510647: movq %rbx, %rax 0x10351064a: je 0x103510653 ; swift_dynamicCastObjCClassUnconditional + 51 0x10351064c: addq $0x8, %rsp 0x103510650: popq %rbx 0x103510651: popq %rbp 0x103510652: retq
0x103510653: leaq 0xcdc8(%rip), %rax ; "Swift dynamic cast failed" 0x10351065a: movq %rax, 0x8ae57(%rip) ; gCRAnnotations + 8 0x103510661: int3
0x103510662: nopw %cs:(%rax,%rax)

I've try to change the "gesture recognition" connection but I still can't tap the image in the IOS simulator and my Xcode version is 6.1.3.

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "showPlaylistDetailSegue" {

            let playlistImageView = sender!.view as! UIImageView
            if let index = find(playlistArray, playlistImageView){

                let playlistDetailController = segue.destinationViewController as! PlaylistDetailsViewController
                playlistDetailController.playlist = Playlist(index: index)
            }
        }
    }

    @IBAction func showPlaylistDetails(sender: AnyObject) {
        performSegueWithIdentifier("showPlaylistDetailSegue", sender: sender)
    }

this is the picture of the connection inspector from tap gesture recogniser inspector

If Pasan's fix still didn't work for you, make sure that the playlists place holder image has 'User Interaction Enabled' you'll find this checkbox by selecting the placeholder then attributes inspector. For some reason I had to go back an re-enable it.