[英]iOS giving EXC_BAD_ACCESS for my function
I wrote a small function to zoom by 2x. 我写了一个小功能来放大2倍。 But it is giving EXC_BAD_ACCESS error while I run it.
但是在我运行它时会给出EXC_BAD_ACCESS错误。 Below is the code
下面是代码
- (CGImageRef)CGImageScale2x:(CGImageRef)imgRef
{
CGFloat width = CGImageGetWidth(imgRef);
CGFloat height = CGImageGetHeight(imgRef);
CGRect imgRect = CGRectMake(0, 0, width, height);
CGAffineTransform transform = CGAffineTransformMakeScale(2.0, 2.0);
CGRect scaledRect = CGRectApplyAffineTransform(imgRect, transform);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef bmContext = CGBitmapContextCreate(NULL,
scaledRect.size.width,
scaledRect.size.height,
8,
0,
colorSpace,
kCGImageAlphaPremultipliedFirst);
CGContextSetAllowsAntialiasing(bmContext, FALSE);
CGContextSetInterpolationQuality(bmContext, kCGInterpolationNone);
CGColorSpaceRelease(colorSpace);
CGContextScaleCTM(bmContext, 2.0, 2.0);
CGContextDrawImage(bmContext, CGRectMake(0, 0,
scaledRect.size.width,
scaledRect.size.height),
imgRef);
CGImageRef scaledImage = CGBitmapContextCreateImage(bmContext);
CFRelease(bmContext);
[(id)scaledImage autorelease];
return scaledImage;
}
I am new to iOS. 我是iOS新手。 Please help.
请帮忙。
Thanks 谢谢
CGImageRef
can't be autoreleased, it's Core Foundation type. CGImageRef
无法自动发布,它是Core Foundation类型。 Try to use CGImageRelease(scaledImage)
instead. 尝试改用
CGImageRelease(scaledImage)
。
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