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swiftibaction

$T4 does not have a member named Generator ERROR swift

  @IBAction func button(sender : AnyObject) {
    var videoConnection : AVCaptureConnection!
    videoConnection = nil
    var connection : AVCaptureConnection
    var port : AVCaptureInputPort
    var stillImageOutput : AVCaptureStillImageOutput?

    for connection in stillImageOutput?.connections{ //this line is where the error is

 }

}

I am trying to take a picture with my custom camera and I am getting this error

Solution

  • stillImageOutput is an optional - even if you are using optional chaining, it cannot be used in a for loop, because if stillImageOutput is nil, the statement would be:

    for connection in nil {
}

    which wouldn't make sense.

    To fix it, you have to use optional binding:

    if let connections = x?.connections {
    for connection in connections {

    }
}