相关疑难解决方法(0)

更新:参考#19285042并向苹果提交错误报告

非常奇怪的错误,没有在网上找到任何东西.它说"BSXPCMessage收到错误消息:连接中断"

我只是在做一些基本的过滤器应用程序.如果我将UIImageView.image重新分配给另一个UIImage,则只会出现错误消息.如果我只是注释掉那行,我就不会得到错误.因此,当我将过滤后的图像分配给UIImageView时,如果您能够想到出现此消息的原因,那将非常有用.

如果您能为此错误提出任何原因,我将不胜感激.

#import "FilterTestsViewController.h"

@interface FilterTestsViewController ()

@end

@implementation FilterTestsViewController

UIImage* _originalImage;
UIImage* _filterImage;
UIImageView* _uiImageView;

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self initialize];
    //flip image by 180*

}

-(void)initialize
{
    _originalImage = [UIImage imageNamed:@"ja.jpg"]; //creates image from file, this will result in a nil CIImage but a valid CGImage;
    [self createFilterImage];
    _uiImageView = [[UIImageView alloc] initWithImage:_filterImage]; //creates a UIImageView with the UIImage
    [self.view addSubview:_uiImageView]; //adds the UIImageView to view;
}

-(void)createFilterImage
{
    NSString* filterName = @"CIFalseColor";
    CIImage* ciImage …

看起来这应该比我发现它更简单.

我AVFoundation在标准委托方法中有一个框架:

- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
       fromConnection:(AVCaptureConnection *)connection

我想在哪里使用Accelerate.Framework.将帧转换为灰度.

框架中有一系列转换方法,包括vImageConvert_RGBA8888toPlanar8(),看起来它可能是我想看到的,但是,我找不到任何如何使用它们的示例!

到目前为止,我有代码:

- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
       fromConnection:(AVCaptureConnection *)connection
{

      @autoreleasepool {
            CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
            /*Lock the image buffer*/
            CVPixelBufferLockBaseAddress(imageBuffer,0);
            /*Get information about the image*/
            uint8_t *baseAddress = (uint8_t *)CVPixelBufferGetBaseAddress(imageBuffer);
            size_t width = CVPixelBufferGetWidth(imageBuffer);
            size_t height = CVPixelBufferGetHeight(imageBuffer);
            size_t stride = CVPixelBufferGetBytesPerRow(imageBuffer);

            // vImage In
            Pixel_8 *bitmap = (Pixel_8 *)malloc(width * height * sizeof(Pixel_8));
            const vImage_Buffer inImage = { bitmap, height, width, stride };

            //How …