@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
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 {
}
}
Just complementing Antonio's answer, if you are 100% sure that in a specific part of the code your optional is not nil, you can just use the ! directly in your var, to avoid the if let check.
for connection in stillImageOutput!.connections {
}
