3
我使用以下代码PDF颠倒
UIImage *CurImage=[UIImage imageWithContentsOfFile:[ImageArr objectAtIndex:i]];
UIView *ViewDraw=[[UIView alloc]initWithFrame:CGRectMake(0,10, pageSize, pageSize)];
ViewDraw.backgroundColor=[UIColor clearColor];
CGContextBeginPage (pdfContext,nil);
//turn PDF upsidedown
CGAffineTransform transform = CGAffineTransformIdentity;
transform = CGAffineTransformMakeTranslation(0,CurImage.size.height);
transform = CGAffineTransformScale(transform, 1.0, -1.0);
CGContextConcatCTM(pdfContext, transform);
int y = (pageSize - CurImage.size.height)/2;
int x = (pageSize - CurImage.size.width)/2;
[CurImage drawInRect:CGRectMake((ViewDraw.frame.width - curImage.frame.width)/2, 24, size.width, curImage.frame.height)];
// CGContextDrawImage(pdfContext, CGRectMake(x,-y, CurImage.size.width, CurImage.size.height), CurImage.CGImage);
CGContextEndPage (pdfContext);
CurImage=nil;
创建PDF但它产生倒置i.e.180度,有镜像。
这里有什么问题?
您的原始标识变换会立即丢弃 - 只需在aCgAffTrans的声明中直接指定CGAffineTransformMakeTranslation的结果即可更清晰地表达出来。 – Adrian
@Adrian:谢谢你,我编辑了我的回答:) –