Question

我正在尝试从我的应用文档目录中提取.pdf并将其加载到PIC中。 PIC显示没有错误，但在预览中没有显示数据。我在这里错过了什么？我只是采取了一种完全错误的做法吗？

-(IBAction)actPrintPDF:(id)sender
{


NSString* fileName = @"Observation.PDF";

NSArray *arrayPaths =
NSSearchPathForDirectoriesInDomains(
                                    NSDocumentDirectory,
                                    NSUserDomainMask,
                                    YES);
NSString *path = [arrayPaths objectAtIndex:0];
NSString* pdfFileName = [path stringByAppendingPathComponent:fileName];

NSLog(@"Path = %@",path);
NSLog(@"pdfFileName = %@",pdfFileName);

NSData *myData = [NSData dataWithContentsOfFile:path];
UIPrintInteractionController *print = [UIPrintInteractionController sharedPrintController];

print.delegate = self;
UIPrintInfo *printInfo = [UIPrintInfo printInfo];
printInfo.outputType = UIPrintInfoOutputGeneral;
printInfo.jobName = [pdfFileName lastPathComponent];
printInfo.duplex = UIPrintInfoDuplexLongEdge;
print.printInfo = printInfo;
print.showsPageRange = YES;
print.printingItem = myData;
UIViewPrintFormatter *viewFormatter = [self.view viewPrintFormatter];
viewFormatter.startPage = 0;
print.printFormatter = viewFormatter;


UIPrintInteractionCompletionHandler completionHandler = ^(UIPrintInteractionController *printInteractionController, BOOL completed, NSError *error) {};

[print presentAnimated:YES completionHandler:completionHandler];

}

日志显示如下： *** 2015-11-08 08：56：30.462 ShortShooter4 [16153：7505181]路径= / Users / myUserName / Library / Developer / CoreSimulator / Devices / 02F8C004-6BA3-4F7B-9FC4-743DA205D7DD / data / Containers / Data /应用/ 796A70BC-4159-4B18-825E-B35043BC5704 /文件

2015-11-08 08：56：30.462 ShortShooter4 [16153：7505181] pdfFileName = / Users / muUserName / Library / Developer / CoreSimulator / Devices / 02F8C004-6BA3-4F7B-9FC4-743DA205D7DD / data / Containers / Data /应用程序/ 796A70BC-4159-4B18-825E-B35043BC5704 /文档/ Observation.PDF 2015-11-08 08：56：31.080 ShortShooter4 [16153：7505181]不平衡调用开始/结束外观转换。***

所以我可以看到文件在那里。我也有不平衡的呼叫问题，但我会单独攻击它。

Answer 1

通过删除解决问题：

UIViewPrintFormatter *viewFormatter = [self.view viewPrintFormatter];
viewFormatter.startPage = 0;
print.printFormatter = viewFormatter;

希望这有助于其他人。

如何从apps文档目录中打印.pdf文档

1 个答案: