UIImageView中的实时相机 [英] Live camera in UIImageView

问题描述

有人知道如何将实时相机输入到 UIImageView 吗？

Does anybody know how I can get a live camera feed into an UIImageView?

我有自定义UI我需要显示相机进纸（前置摄像头）所以我不能使用 UIImagePickerControl 。

I have a custom UI where I need to show the camera feed (front facing camera) so I cannot use the UIImagePickerControl.

推荐答案

您需要创建一个捕获会话，并开始运行。完成后，您可以将捕获会话中的图层添加到视图中：

You need to create a capture session, and start it running. Once that's done you can add the layer from the capture session to your view:

- (void)setupCaptureSession
{
    NSError* error = nil;

    // Create the session
    _captureSession = [[AVCaptureSession alloc] init];    
    _captureSession.sessionPreset = AVCaptureSessionPresetMedium;
    AVCaptureDevice* device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

    AVCaptureDeviceInput* input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];

    [_captureSession addInput:input];
    AVCaptureVideoDataOutput* output = [[AVCaptureVideoDataOutput alloc] init];
    [_captureSession addOutput:output];

    // Configure your output.
   dispatch_queue_t queue = dispatch_queue_create("myCameraOutputQueue", NULL);
   //If you want to sebsequently use the data, then implement the delegate.
   [output setSampleBufferDelegate:self queue:queue]; 
}

完成后，您可以按如下方式创建预览图层：

Having done that, you can create a preview layer as follows:

_previewLayer = [AVCaptureVideoPreviewLayer layerWithSession:_captureSession];
[_captureSession startRunning];

然后将预览图层添加到视图中：

And then add the preview layer to your view:

_myView.layer addSubLayer:_previewLayer];

这篇关于UIImageView中的实时相机的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！