如何在 Objective-C 的 NSDocument 目录中保存和获取多个 pdf 文件？

Question

我正在从服务器下载多个 pdf 文件。下载完成后，我需要将 pdf 文件保存在本地并从 pdf 文件中获取并在 UIDocument 交互控制器中显示 pdf 文件。我是这样写的。但只显示一个文件。其余文件不显示。

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [self.data appendData:data];

    NSURL *tmpDirURL = [NSURL fileURLWithPath:NSTemporaryDirectory() isDirectory:YES];        // get 
    /tmp folder path

    NSURL *fileURL = [[tmpDirURL URLByAppendingPathComponent:@"temp_pdf"] URLByAppendingPathExtension:@"pdf"];

    [self.data writeToURL:fileURL atomically:YES];

    self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:fileURL];

    self.documentInteractionController.delegate = self;

    [self.documentInteractionController presentPreviewAnimated:YES];
}

Answer 1

NSString *documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSString *filePath = [documents stringByAppendingPathComponent:@"file.plist"];