将UIView导出UIImage和pdf

//把view截图为UIImage
- (UIImage *)renderInImage:(UIView *)view
{
    UIGraphicsBeginImageContext(view.bounds.size);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
     
    return (img);
}

//currentView截图转换为PDF
- (NSMutableData *)renderInView:(UIView *)currentView
{
    NSMutableData *mtlData = [[[NSMutableData alloc] init] autorelease];
    CGDataConsumerRef dataConsumer = CGDataConsumerCreateWithCFData((CFMutableDataRef)mtlData);
    CGRect mediaBox = currentView.bounds;
    CGContextRef ctx = CGPDFContextCreate(dataConsumer, &mediaBox, NULL);
    CGPDFContextBeginPage(ctx, NULL);
    CGContextScaleCTM(ctx, 1, -1);
    CGContextTranslateCTM(ctx, 0, -mediaBox.size.height);
    [currentView.layer renderInContext:ctx];
    CGPDFContextEndPage(ctx);
    CFRelease(ctx);
    CGDataConsumerRelease(dataConsumer);
     
    return (mtlData);
}