Question

我试图从iOS中的网址打印PDF。我可以显示打印对话框，但是作业失败并显示错误代码3.我尝试了什么，或者我是否必须先下载PDF？

printUrl

-(void) printUrl:(NSString *)url
{
    UIPrintInteractionController *pic = [UIPrintInteractionController sharedPrintController];

    pic.delegate = self;

    NSLog(@"Printing from URL: %@", url);
    if ([UIPrintInteractionController canPrintURL:[[NSURL alloc] initWithString:url]]) {
        UIPrintInfo *printInfo = [UIPrintInfo printInfo];
        printInfo.outputType = UIPrintInfoOutputGeneral;
        printInfo.jobName = [url lastPathComponent];
        printInfo.duplex = UIPrintInfoDuplexLongEdge;
        pic.printInfo = printInfo;
        pic.showsPageRange = YES;
        pic.printingItem = url;

        void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) = ^(UIPrintInteractionController *pic, BOOL completed, NSError *error) {
            //self.content = nil;
            NSLog(@"Print job %@", (completed ? @"completed" : @"didn't complete"));
            if (error) {
                NSLog(@"FAILED! due to error in domain %@ with error code %ld", error.domain, (long)error.code);
            }
        };

        [pic presentAnimated:YES completionHandler:completionHandler];
    } else {
        NSLog(@"Can't print specified URL");
    }
}

记录输出

<Warning>: Printing from url: http://www.energy.umich.edu/sites/default/files/pdf-sample.pdf
<Warning>: Can print: Yes
<Warning>: -[PKPaperList matchedPaper:preferBorderless:withDuplexMode:didMatch:] paperToMatch=<PKPaper: 0x187e4320> result=<PKPaper: 0x187d9ba0> matchType=0
<Warning>: Print job completed
<Warning>: FAILED! due to error in domain UIPrintErrorDomain with error code 3

Answer 1

我在这个问题上犯了一个非常愚蠢的错误。我将URL作为NSString传递而不是所需的NSURL。

如何在iOS中打印PDF？

1 个答案: