将过滤器应用于 CIImage [核心图像] 时获取 EXC_BAD_ACCESS

我正在研究 Imagebase 应用程序。我想对图像应用一些过滤器。为此，我使用了 [Core Image]。

我在数组中存储了一些 FilterName 并将过滤效果显示为预览我使用 UICollection 视图。当用户点击预览图像时，过滤器将应用于主图像视图。但是当我点击预览单元格时，过滤器在主图像视图上成功应用。但在那之后，当我拖动集合视图单元格以应用下一个预览时，我在过滤方法上遇到了 BAD_ACCESS 错误。

-(UIImage *) applyFilter: (UIImage*) picture withFilterName:(NSString*)Filtername

这是我应用过滤器的代码：-

使用过滤器阵列和 RegisterCollectionview 单元进行初始设置：-

-(void)setUpDefaultUI{
    [self HideControlsAndSetupUI];

    arrFilter = @[ @"Original",
                   @"CILinearToSRGBToneCurve",
                   @"CIPhotoEffectChrome",
                   @"CIPhotoEffectFade",
                   @"CIPhotoEffectInstant",
                   @"CIPhotoEffectMono",
                   @"CIPhotoEffectNoir",
                   @"CIPhotoEffectProcess",
                   @"CIPhotoEffectTonal",
                   @"CIPhotoEffectTransfer",
                   @"CISRGBToneCurveToLinear",
                   @"CIVignette",
                   // @"CIVignetteEffect",
                   @"CISepiaTone",
                   ];

    [self.vwCollection registerClass:[ActivityCollectionViewCell class] forCellWithReuseIdentifier:@"ActivityCollectionViewCell"];
    [self.vwCollection registerNib:[UINib nibWithNibName:@"ActivityCollectionViewCell" bundle:nil] forCellWithReuseIdentifier:@"ActivityCollectionViewCell"];
    _imgEdit.image=_stillImage; // To apply filter on this Image 
    _OriginalImage=_stillImage; // Original image if user declined to use filter

}

CollectionView 数据源：-

- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath {


    NSLog(@"filterAvailable");

    ActivityCollectionViewCell *cell = [cv dequeueReusableCellWithReuseIdentifier:@"ActivityCollectionViewCell" forIndexPath:indexPath];

    if (cell == nil) {
        NSArray *xib = [[NSBundle mainBundle] loadNibNamed:@"ActivityCollectionViewCell" owner:self options:nil];
        cell = [xib objectAtIndex:0];
        [cell.imgVw setContentMode:UIViewContentModeScaleAspectFill];
    }
      if (indexPath.item==0) {
        cell.imgVw.image = _OriginalImage; //Original Image on 0 index
    }else{
         UIImage *img=[self applyFilter:_stillImage withFilterName:[arrFilter objectAtIndex:indexPath.row]]; // Apply filter on this method
        cell.imgVw.image=img;
}
    return cell;
}

Collectionview 委托 :-

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
    ActivityCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"ActivityCollectionViewCell" forIndexPath:indexPath];
    if (cell == nil) {
        NSArray *xib = [[NSBundle mainBundle] loadNibNamed:@"ActivityCollectionViewCell" owner:self options:nil];
        cell = [xib objectAtIndex:0];
    }
 if (indexPath.item==0) {
        _imgEdit.image=_OriginalImage; // Set original image in main Imageview
    }else{
        UIImage *img=[self applyFilter:_stillImage withFilterName:[arrFilter objectAtIndex:indexPath.row]];
        _imgEdit.image = img;  // Apply filter on Main Imageview 
    }
    }

从此方法过滤应用：-

-(UIImage *) applyFilter: (UIImage*) picture withFilterName:(NSString*)Filtername
{
    UIImageOrientation originalOrientation = picture.imageOrientation;
    CGFloat originalScale = picture.scale;
    CIImage *beginImage = [CIImage imageWithCGImage:picture.CGImage];
    CIContext *context = [CIContext contextWithOptions:nil];
     CIFilter *filter = [CIFilter filterWithName:Filtername keysAndValues: kCIInputImageKey, beginImage, nil, [NSNumber numberWithFloat:0.7], nil];
    CIImage *outputImage = [filter outputImage];
    CGImageRef cgimg =
    [context createCGImage:outputImage fromRect:[outputImage extent]];
    UIImage *newImg = [UIImage imageWithCGImage:cgimg scale:originalScale orientation:originalOrientation];

    //CGImageRelease(CGImageRef) method.
    CGImageRelease(cgimg);
    return newImg;

}

错误图像：- - BAD_ACCESS