Webview 中的 PDF 性能

PDF in webview performance(Webview 中的 PDF 性能)

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.性能很差.我尝试通过 Safari 从 Web 加载相同的 PDF，性能非常好.有没有人有任何想法?(这个 viewController 被呈现为一个 modalViewController).

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];




}

推荐答案

我最终使用了 documentInteractionController 来在 Quick Look 中显示 PDF.2010 WWDC 视频中有一个很棒的教程.

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.

不知道为什么它在 webView 中效果不佳，但在 Quick Look 中却很流畅.

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

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