Nina Williams
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2
issues of
Nina Williams
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:...