iphone - UIDocumentInteractionController Controller 问题

Question

我想从Web服务下载pdf文件，并使用 UIDocumentInteractionController 打开它。我该怎么办？我使用以下代码进行下载

NSData *pdfData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:@"myurl/abc.pdf"]];
NSString *resourceDocPath = [[NSString alloc] initWithString:[[[[NSBundle mainBundle]  resourcePath] stringByDeletingLastPathComponent] stringByAppendingPathComponent:@"Documents"]];
NSString *filePath = [resourceDocPath stringByAppendingPathComponent:@"abcd.pdf"];
pdfData writeToFile:filePath atomically:YES];

现在我应该怎么做才能用 打开它UIDocumentInteractionController

Answer 1

您可以使用波纹管代码以UIDocumentInteractionController打开PDF。这是显示NSBundle的pdf示例，也可以从Document目录中显示，就像显示图像一样。您需要完整的文档路径，然后使用NSURL将其转换为fileURLWithPath:-

在 yourViewController.h 文件中:-

@interface yourViewController : UIViewController<UIDocumentInteractionControllerDelegate>
{
     UIDocumentInteractionController *documentationInteractionController; 
}

在** yourViewController.m 文件中:-**

    -(void) viewDidAppear:(BOOL)animated {

            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
            NSString *documentsDirectory = [paths objectAtIndex:0]; 
            NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"abcd.pdf"];

            NSURL *pdfUrl = [NSURL fileURLWithPath:filePath];
            documentationInteractionController = [UIDocumentInteractionController interactionControllerWithURL:pdfUrl];
            documentationInteractionController.delegate = self;
            [documentationInteractionController presentPreviewAnimated:YES];

        [super viewDidAppear:animated];
    }

UIDocumentInteractionController的代表

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

Demo link
快乐的编码... :)