ios - 通过 UIDocumentInteractionController 打开文件

Question

我正在使用 UIDocumentInteractionController 在我的应用程序中打开文档。我使用以下方法预览 PDF 文件:-

- (IBAction)previewDocument:(id)sender 
{
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"sample" ofType:@"pdf"];

    // Initialize Document Interaction Controller
    self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:filePath]];

    // Configure Document Interaction Controller
    [self.documentInteractionController setDelegate:self];

    // Preview PDF
    [self.documentInteractionController presentOptionsMenuFromRect:down.frame inView:self.view animated:YES];

}

我读到我们也可以通过 UIDocumentInteractionController 从一个应用程序中读取其他应用程序中的文件。

在我的应用程序中，如何使用 UIDocumentInteractionController 从其他应用程序读取文件？这一切是如何发生的？

Answer 1

预览 PDF 文档和共享。

设置委托(delegate)方法:-UIDocumentInteractionControllerDelegate

NSURL *URL = [[NSBundle mainBundle] URLForResource:@"Your PDF Name" withExtension:@"pdf"];
UIDocumentInteractionController *documentInteractionController =[UIDocumentInteractionController interactionControllerWithURL:URL];
documentInteractionController.delegate = self;
[documentInteractionController presentPreviewAnimated:YES];

- (UIViewController *) documentInteractionControllerViewControllerForPreview: (UIDocumentInteractionController *) controller {
return self;
}

如果您有任何困惑，请单击下面的链接并阅读: https://developer.apple.com/library/ios/documentation/FileManagement/Conceptual/DocumentInteraction_TopicsForIOS/Articles/PreviewingandOpeningItems.html