Question

我创建了一个自定义的 AVFoundation 相机并使用 @IBDesignable 加载到另一个视图作为子视图，拍摄完图片后我想将其分配给{{1但是，当按下按钮时，自定义摄像机视图（UIImageView）会崩溃并在屏幕中向上移动，而不是将其分配给UIView，当自定义摄像机视图加载时会发生这种情况开头，然后当我再次加载自定义相机视图时，它会将图像分配给UIImageView。

捕获图像方法：

UIImageView

我还尝试了 @IBAction func captureImage(sender: AnyObject) { if let stillOutput = self.captureImageOutput { // we do this on another thread so that we don't hang the UI dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) { //find the video connection var videoConnection : AVCaptureConnection? for connecton in stillOutput.connections { //find a matching input port for port in connecton.inputPorts!{ if port.mediaType == AVMediaTypeVideo { videoConnection = connecton as? AVCaptureConnection break //for port } } if videoConnection != nil { break// for connections } } if videoConnection != nil { stillOutput.captureStillImageAsynchronouslyFromConnection(videoConnection){ (imageSampleBuffer : CMSampleBuffer!, _) in let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(imageSampleBuffer) let pickedImage: UIImage = UIImage(data: imageData, scale: 1.0)! dispatch_async(dispatch_get_main_queue(), { self.capturePhoto.image = pickedImage }) } } } } } 并且 UIImageView 中没有任何加载，但屏幕不会崩溃。

dispatch_sync

Answer 1

我刚试过它，这对我有用（Swift 2.0）

override func viewDidLoad() {
    super.viewDidLoad()
    imageView = UIImageView(frame: self.view.frame)
    self.view.addSubview(imageView)
}

func takeImage() {

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {

        guard let videoConnection = self.stillImageOutput.connectionWithMediaType(AVMediaTypeVideo) else { return }
        guard videoConnection.enabled else { return }

        self.stillImageOutput.captureStillImageAsynchronouslyFromConnection(videoConnection) { (buffer: CMSampleBuffer!, error: NSError!) -> Void in

            let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(buffer)
            let image: UIImage = UIImage(data: imageData, scale: 1.0)!

            dispatch_async(dispatch_get_main_queue(), {
                self.imageView.image = image
                print("picture taken")
            })
        }
    }

}

图像已成功拍摄并添加到ViewController中。如果这对你不起作用，也许你可以解释一下你的设置，这样我就可以尝试重现错误/崩溃。

主视图崩溃时的子视图将图像从AVFoundation分配给UIImageView

1 个答案: