iphone - 将 UIImage 转换为 PDF 文件

Question

我正在尝试将 UIImage 保存为 PDF 文件。我怎样才能做到这一点？我如何将图像保存到 pdf 文件中，然后导出该 pdf 文件？请针对我遇到的问题提出解决方案。

谢谢。

Answer 1

你好，我发现这可行，希望能帮助到你!

-(void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename
    {
        // Creates a mutable data object for updating with binary data, like a byte array
        NSMutableData *pdfData = [NSMutableData data];

        // Points the pdf converter to the mutable data object and to the UIView to be converted
        UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil);
        UIGraphicsBeginPDFPage();

        // draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData
        [aView.layer renderInContext:UIGraphicsGetCurrentContext()];

        // remove PDF rendering context
        UIGraphicsEndPDFContext();

        // Retrieves the document directories from the iOS device
        NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);

        NSString* documentDirectory = [documentDirectories objectAtIndex:0];
        NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];

        // instructs the mutable data object to write its context to a file on disk
        [pdfData writeToFile:documentDirectoryFilename atomically:YES];
        NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);
    }