Question

我正在做的是从位图数据创建CGImage并将其转换为UIImage。

我下面有代码

 - (UIImage *)imageWithBitmapBytes:(Byte *)imageBytes width:(size_t)width height:(size_t)height pixelCount:(NSUInteger)pixelCount {
    NSUInteger imageBufferSize = width * height * pixelCount;
    CGDataProviderRef dataProviderRef = CGDataProviderCreateWithData(nil, imageBytes, imageBufferSize, nil);
    NSUInteger bitsPerComponent = 8;
    NSUInteger bitsPerPixel = bitsPerComponent * pixelCount;
    NSUInteger bytesPerRow = width * pixelCount;
    CGImageRef cgImage = CGImageRetain(CGImageCreate(width, height, bitsPerComponent, bitsPerPixel, bytesPerRow, CGColorSpaceCreateDeviceGray(), kCGImageAlphaLast, dataProviderRef, nil, false, kCGRenderingIntentDefault));
    CGDataProviderRelease(dataProviderRef);
    UIImage *image =[UIImage imageWithCGImage:cgImage];
    CGImageRelease(cgImage);

    return image;
}

我在打开和关闭ARC的两种情况下都测试了此代码。

我总是在此行收到错误的访问内存错误

UIImage *image =[UIImage imageWithCGImage:cgImage];

Answer 1

我认为问题是：

NSUInteger imageBufferSize = width * height * pixelCount;

因为 imageBufferSize 的长度应为 imageBytes ...

希望对您有帮助

imagewithcgimage在Objective-C中总是返回错误的访问内存错误

1 个答案: