Question

我收到此错误：

***由于未捕获的异常'NSInternalInconsistencyException'而终止应用程序，原因：'试图过度发布a framebuffer，你忘了调用-useNextFrameForImageCapture吗？在使用-imageFromCurrentFramebuffer？'
之前

当我将滤镜应用于这样的图像时，不会发生此错误：

的ViewController

self.editImageView = [[GPUImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width - bgPadding, self.view.frame.size.width - bgPadding)];
[self.editImageView setCenter:[self makeCenterWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - self.toolBar.frame.size.height)]];
[self.editImageView setBackgroundColor:[UIColor clearColor]];
[self.editImageView setContentMode:UIViewContentModeScaleAspectFit];
[self.editImageView setBackgroundColorRed:0 green:0 blue:0 alpha:0];
[self.view addSubview:self.editImageView];

FirstFilter *filter = [[FirstFilter alloc] init];
[filter imageWithFilter:0.15f inputImage:self.editImage imageView:self.editImageView];

FirstFilter.m

-(void)imageWithFilter:(float)value inputImage:(UIImage *)image imageView:(GPUImageView *)gpuImageView
{
    //background picture setup
    backgroundPicture = [[GPUImagePicture alloc] initWithImage:image smoothlyScaleOutput:YES];

    gaussianBlurFilter = [[GPUImageGaussianBlurFilter alloc] init];
    [gaussianBlurFilter setBlurRadiusInPixels:1.0f];

    opacityFilter = [[GPUImageOpacityFilter alloc] init];
    [opacityFilter setOpacity:0.1f];

    [backgroundPicture addTarget:gaussianBlurFilter];
    [gaussianBlurFilter addTarget:opacityFilter];

    //yellow picture setup
    GPUImagePicture *yellowPicture = [[GPUImagePicture alloc] initWithImage:[self imageFromColor:[UIColor colorWithRed:247.0f/255.0f green:209.0f/255.0f blue:148.0f/255.0f alpha:0.7f]] smoothlyScaleOutput:NO];

    //red picture setup
    GPUImagePicture *redPicture = [[GPUImagePicture alloc] initWithImage:[self imageFromColor:[UIColor colorWithRed:225.0f/255.0f green:49.0f/255.0f blue:90.0f/255.0f alpha:0.15f]] smoothlyScaleOutput:NO];

    //blend setup
    softlightBlendFilter = [[GPUImageSoftLightBlendFilter alloc] init];
    GPUImageSoftLightBlendFilter *softBlend = [[GPUImageSoftLightBlendFilter alloc] init];

    //blend
    sourcePicture = [[GPUImagePicture alloc] initWithImage:image smoothlyScaleOutput:YES];

    [sourcePicture addTarget:softlightBlendFilter];
    [yellowPicture addTarget:softlightBlendFilter];
    [softlightBlendFilter addTarget:softBlend];
    [redPicture addTarget:softBlend];

    [softBlend useNextFrameForImageCapture];

    GPUImageView *imageView = (GPUImageView *)gpuImageView;
    [softBlend addTarget:imageView];

    [sourcePicture processImage];
    [backgroundPicture processImage];
    [yellowPicture processImage];
    [redPicture processImage];
}

但是，当我从其他地方拨打imageWithFilter:inputImage:imageView:时，应用程序会崩溃并出错？像这样......

//mainContainerButton is a UIButton
GPUImageView *imageView = [[GPUImageView alloc] initWithFrame:mainContainerButton.frame];
[imageView setContentMode:UIViewContentModeScaleAspectFill];
[imageView setBackgroundColor:[UIColor clearColor]];
[imageView setBackgroundColorRed:0 green:0 blue:0 alpha:0];
[mainContainerButton addSubview:imageView];

FirstFilter *filter = [[FirstFilter alloc] init];
[filter imageWithFilter:0.15f inputImage:(UIImage *)[contentArray objectAtIndex:i] imageView:(GPUImageView *)imageView];

我还尝试在GPUImageFramebuffer.m中评论这行代码，并且没有发生崩溃，我通过过滤器获取了我的图像。

NSAssert(framebufferReferenceCount > 0, @"Tried to overrelease a framebuffer, did you forget to call -useNextFrameForImageCapture before using -imageFromCurrentFramebuffer?");

我的代码中遗漏了什么？

iOS - GPUImageFramebuffer断言失败

0 个答案: