0

我用过这段代码：

NSURL *documentURL= [NSURL fileURLWithPath:aStrPrintPdfPath isDirectory:NO];
PSPDFDocument *document = [PSPDFDocument documentWithURL:documentURL];

PSPDFViewController *pdfController = [[PSPDFViewController alloc] initWithDocument:document];
pdfController.pageTransition = PSPDFPageTransitionCurl;
pdfController.renderingMode = PSPDFPageRenderingModeFullPageBlocking;
[pdfController setUpdateSettingsForRotationBlock:^(PSPDFViewController *aPDFController, UIInterfaceOrientation toInterfaceOrientation) {
    // conditionally set depending on rotation
    if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {
        aPDFController.pageMode = PSPDFPageModeDouble;
    }  else {
        aPDFController.pageMode = PSPDFPageModeSingle;
    }

}];

UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:pdfController];
[self presentViewController:navController animated:YES completion:NULL];
pdfController.title = @"";
[pdfController release];
[navController release];

现在problem是否需要30 to 50 seconds给出这些错误：错误：NSError *PSPDFError(NSInteger, NSString *_ strong, NSError * _autoreleasing *)/35 Error 210: documentRef is nil; cannot get pageReffor page 1.hanging my UI completetly然后opens用pdfControllernothing

4

2 回答 2

2

这是 PSPDFKit 的主要开发者。

当您得到“documentRef is nil; cannot get pageRef”时 - 这意味着用于创建 PSPDFDocument 的 PDF 源无效。检查isValid文档上的属性以编程方式对此进行测试。

我不确定您是什么版本，但至少 3.x 不会阻塞您的 UI 线程，而只是显示一个空视图控制器，等待您设置不同的文档。

于 2013-10-12T14:22:06.287 回答
0

以前从未使用过 PSPDFViewController ，但是从您收到的错误来看，可能是内存可能在 init 中管理的情况。

这些完全是粗略的建议，但只是想帮助你：

try removing your pdfcontroller release or adding an autorelease at the end of your init (this probably won't have an effect if you add the autorelease however)

try creating a @property for your pdfcontroller in your header file and releasing/managing the memory in your viewdidunload method (and maybe even dealloc).
于 2013-10-08T04:53:00.340 回答