webview性能中的PDF [英] PDF in webview performance

问题描述

我正在使用以下（简单）代码将PDF从我的应用程序中的文档文件夹加载到UIWebView中。表现非常糟糕。我尝试通过Safari从网上加载相同的PDF，性能非常好。有没有人有任何想法？ （此viewController呈现为modalViewController）。

- firstView.m

  InfoViewController * mcontroller = [[InfoViewController alloc] init]; 
 
 NSArray * paths = NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，
 NSUserDomainMask，YES）; 
 NSString * docsPath = [paths objectAtIndex：0]; 
 
 
 NSString * pathToPDF = [NSString stringWithFormat：@％@ / myPDF.PDF，docsPath]; 
 
 NSURL * targetURL = [NSURL fileURLWithPath：pathToPDF]; 
 
 mcontroller.urlToFile = targetURL; 
 [self presentModalViewController：mcontroller animated：YES]; 
  

modalViewController.m -

   - （void）viewDidLoad {
 [super viewDidLoad]; 
 
 NSURLRequest * request = [NSURLRequest requestWithURL：urlToFile]; 
 
 [webView loadRequest：request]; 
 
 
 
 
} 
  

解决方案

我最终使用documentInteractionController来快速查看显示PDF。在2010 WWDC vids中有一个很好的教程。

不知道为什么它在webView中效果不佳，但它在Quick Look中像丝绸一样光滑。 / p>

I am using the following (simple) code to load a PDF from the documents folder in my app into a UIWebView. The performance is very poor. I tried loading the same PDF from the web via Safari and the performance was great. Does anyone have any ideas? (this viewController is being presented as a modalViewController).

- firstView.m

InfoViewController *mcontroller = [[InfoViewController alloc] init];

        NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                             NSUserDomainMask, YES);
        NSString *docsPath = [paths objectAtIndex:0];


NSString *pathToPDF = [NSString stringWithFormat:@"%@/myPDF.PDF",docsPath];

NSURL *targetURL = [NSURL fileURLWithPath:pathToPDF];

mcontroller.urlToFile = targetURL;
[self presentModalViewController:mcontroller animated:YES];

modalViewController.m -

- (void)viewDidLoad {
    [super viewDidLoad];

    NSURLRequest *request = [NSURLRequest requestWithURL:urlToFile];

    [webView loadRequest:request];




}

解决方案

I ended up using the documentInteractionController for this to display the PDF in Quick Look. There is a great tutorial for this in the 2010 WWDC vids.

No idea why it wasn't working well in webView, but it's smooth as silk in Quick Look.

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