ios - 将存储在 NSMutableArray 中的多个 UIImage 转换为 PDF

Question

我正在将 PDF 文件的每一页转换为 UIImage 并将其存储在 NSMutableArray 中。现在我想将相同的 UIImages 转换为PDF文件和以前一样。我可以转换单个图像，但我希望一次转换所有图像并且应该与之前的 PDF 文件相同。

我将 UIImage 转换为 PDF 页面的代码:

UIImage *image1 = [ UIImage originalSizeImageWithPDFNamed:[NSString stringWithFormat:@"%@%@",fileName,@".pdf"] atPage:i+1 ];
imageData = [NSData dataWithData:UIImagePNGRepresentation(image1)];
[thumbImage addObject:[UIImage imageWithData:imageData]];

如何将整个 UIImages 转换为单个 PDF 文件？

Answer 1

使用这个方法:

- (void)createPDFWithImagesArray:(NSMutableArray *)array andFileName:(NSString *)fileName
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *PDFPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.pdf",fileName]];

    UIGraphicsBeginPDFContextToFile(PDFPath, CGRectZero, nil);
    for (UIImage *image in array)
    {
        // Mark the beginning of a new page.
        UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, image.size.width, image.size.height), nil);

        [image drawInRect:CGRectMake(0, 0, image.size.width, image.size.height)];
    }
    UIGraphicsEndPDFContext();
}