Чтение данных Pdf из webView

Question

Я использую оба подхода, читая внутренний HTML-контент в webView и читая AsciiString, но в обоих подходах, когда я конвертирую его в PDF-данные для форматирования данных. Пожалуйста, посмотрите мой код и скажите мне, где я ошибаюсь.

-(NSData *)createPDFfromUIWebView:(UIWebView*)webView saveToDocumentsWithFileName:(NSString*)aFilename 
{ 
    // Creates a mutable data object for updating with binary data, like a byte array 
    [self removeFileByName]; 

    // NSString *heightStr = [webView stringByEvaluatingJavaScriptFromString:@"document.body.scrollHeight;"]; 
    // NSString *heightStr = [webView stringByEvaluatingJavaScriptFromString:@"document.body.innerHTML"]; 
    // NSString *heightStr = [webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.outerHTML"]; 
    // NSString *heightStr = (NSString *)[webView stringByEvaluatingJavaScriptFromString:@"getParam();"]; 
    // NSString *heightStr = (NSString *)[webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.innerText;"]; 
    // NSString *heightStr = [webView stringByEvaluatingJavaScriptFromString:@"document.all[0].innerHTML"]; 

    NSURL *requestURL = [[self.webViewIphone request] URL]; 
    NSError *error; 
    NSString *heightStr = [NSString stringWithContentsOfURL:requestURL 
                encoding:NSASCIIStringEncoding 
                 error:&error]; 


    debug(@"HTml string %@",heightStr); 
    int height = [heightStr length]; 
    CGFloat screenHeight = webView.scrollView.contentSize.height; 
    debug(@"%f",screenHeight); 
    int pages = ceil(height/screenHeight); 

    NSMutableData *pdfData = [NSMutableData data]; 
    UIGraphicsBeginPDFContextToData(pdfData, webView.bounds, nil); 
    CGRect frame = [webView frame]; 
    for (int i = 0; i < pages; i++) { 
     // Check to screenHeight if page draws more than the height of the UIWebView 
     if ((i+1) * screenHeight > height) { 
      CGRect f = [webView frame]; 
      f.size.height -= (((i+1) * screenHeight) - height); 
      [webView setFrame: f]; 
     } 

     UIGraphicsBeginPDFPage(); 
     CGContextRef currentContext = UIGraphicsGetCurrentContext(); 
     //  CGContextTranslateCTM(currentContext, 72, 72); // Translate for 1" margins 

     [[[webView subviews] lastObject] setContentOffset:CGPointMake(0, screenHeight * i) animated:NO]; 
     [webView.layer renderInContext:currentContext]; 
    } 

    UIGraphicsEndPDFContext(); 
    // Retrieves the document directories from the iOS device 
    NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES); 

    NSString* documentDirectory = [documentDirectories objectAtIndex:0]; 
    NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename]; 

    // instructs the mutable data object to write its context to a file on disk 
    [pdfData writeToFile:documentDirectoryFilename atomically:YES]; 
    NSData *dataTemp = [NSData dataWithContentsOfFile:documentDirectoryFilename]; 

    return dataTemp; 

} 

Answer 1

Это используется для загрузки файла pdf в UIWebview.

UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(10, 10, 200, 200)]; 

NSURL *targetURL = [NSURL URLWithString:@"http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIWebView_Class/UIWebView_Class.pdf"]; 
NSURLRequest *request = [NSURLRequest requestWithURL:targetURL]; 
[webView loadRequest:request]; 

[self.view addSubview:webView]; 
[webView release]; 

Answer 2

NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]; 
NSString *fileName =[docPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.xlsx",downloadedfilename]]; 
[[NSFileManager defaultManager] createFileAtPath:reportName contents:receivedData attributes:nil]; 

NSURL *url = [NSURL fileURLWithPath:fileName]; 
NSURLRequest *request = [NSURLRequest requestWithURL:url]; 

[webView loadRequest:request]; 

вы можете загрузить XLSX, PDF, файлы документов слова, как приведенный выше код