博主这代码风格得改改了

[zhaofucheng1129]

能不能用guard和可选绑定代替强制解包？ 能不能不要这么多无意义的强制转型？

let stillImageConnection: AVCaptureConnection? = connectionWithMediaType(mediaType: .video, connections: (stillImageOutput?.connections)! as [AnyObject])

open func connectionWithMediaType(mediaType: AVMediaType, connections: [AnyObject]) -> AVCaptureConnection? {
        for connection: AnyObject in connections {
            let connectionTmp: AVCaptureConnection = connection as! AVCaptureConnection

            for port: Any in connectionTmp.inputPorts {
                if (port as AnyObject).isKind(of: AVCaptureInput.Port.self) {
                    let portTmp: AVCaptureInput.Port = port as! AVCaptureInput.Port
                    if portTmp.mediaType == mediaType {
                        return connectionTmp
                    }
                }
            }
        }
        return nil
    }

先把[AVCaptureConnection]强制转成[AnyObject] 再遍历 强制转回 AVCaptureConnection 这是什么操作？？？？

这代码这么多强制操作真的大丈夫？？？

[wooseng]

这代码写的比较早，可能是当时情况所需，写过的代码，只要没出bug，看都不想看，改更是不可能改的，你懂得