ios – 主视图崩溃时的子视图将AVFoundation中的图像分配给UIImageView时

概述我已经创建了一个自定义AVFoundation摄像头并作为子视图加载到另一个视图中使用@IBDesignable,在拍摄图像后我想将其分配给UI ImageView,但是当按下按钮时,自定义摄像头视图(UIView)崩溃并向上移动在屏幕上,而不是将其分配给UIImageView,这发生在自定义摄像头视图加载开始时,然后当我再次加载自定义摄像头视图时,它会将图像分配给UIImageView. 捕获图 我已经创建了一个自定义AVFoundation摄像头并作为子视图加载到另一个视图中使用@IBDesignable,在拍摄图像后我想将其分配给UI ImageVIEw,但是当按下按钮时,自定义摄像头视图(UIVIEw)崩溃并向上移动在屏幕上,而不是将其分配给UIImageVIEw,这发生在自定义摄像头视图加载开始时,然后当我再次加载自定义摄像头视图时,它会将图像分配给UIImageVIEw.

捕获图像方法：

@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                        })                    }                }            }        }    }

我也尝试过dispatch_sync并且在UIImageVIEw中没有任何加载,但屏幕不会崩溃.

dispatch_sync(dispatch_get_main_queue(),{      self.capturePhoto.image = pickedImage})

解决方法 我只是测试了它,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")            })        }    }}

图像成功拍摄并添加到VIEwController.如果这对您不起作用,也许您可​​以在设置上解释更多,以便我可以尝试重现错误/崩溃.

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