ios - 我有 Github PDF 阅读器使用我的 Swift 代码和 Test.pdf 文件，但是如何读取存储在 Parse 数据库中的 pdf 文件？

Question

1. 这是当前 PDF 阅读器的 swift 代码，必须知道文件和路径:

   class ViewController: UIViewController , ReaderViewControllerDelegate{
   
   @IBAction func didClickOpenPDF(sender: AnyObject) {
   
   
   let file = NSBundle.mainBundle().pathForResource("Test", ofType: "pdf")
   let document:ReaderDocument = ReaderDocument.withDocumentFilePath(file, password: nil)
   print(file)
   print("DOcument = ", document)
   
   if (document != "")
   {
       print("not empty")
       let readerViewController:ReaderViewController = ReaderViewController(readerDocument: document)
       readerViewController.delegate = self
   
   
       readerViewController.modalTransitionStyle = UIModalTransitionStyle.CrossDissolve
       readerViewController.modalPresentationStyle = UIModalPresentationStyle.FullScreen
   
   
       [self.presentViewController(readerViewController, animated: true, completion: nil)]
   }
   }
   

   1. 这是解析数据库结构:

db structure

1. 那么我如何访问和阅读“bookfile”字段并知道路径目录呢？ 任何人都可以帮助并提供一些我可以使用的 swift-2 代码吗？谢谢

Answer 1

我已经完成了相同类型的功能。 试试下面的代码。可能会有所帮助。根据需要对以下代码进行要求更改。

var query = PFQuery(className:"ModelHome")
query.whereKey("guestName", equalTo:"Sean Plott")
query.findObjectsInBackgroundWithBlock 
{
  (objects: [PFObject]?, error: NSError?) -> Void in

  if error == nil 
  {
      // The find succeeded.
      print("Successfully retrieved \(objects!.count) scores.")
     // Do something with the found objects
     if let objects = objects as? [PFObject] 
     {
         for object in objects
         {
            print(object.objectId)

           //Get PDF Data from Object.
           let userPDFFile = object["docs"] as PFFile
           userPDFFile.getDataInBackgroundWithBlock
           {
             (pdfData: NSData?, error: NSError?) -> Void in
            if error == nil 
            {
                if let pdfData = pdfData 
               {
                  //Do the your required code here after getting pdf data.
               }
            }
         }
      }
    }
  } 
  else 
  {
    // Log details of the failure
    print("Error: \(error!) \(error!.userInfo!)")
  }
}