在UIWebView iOS 8中渲染PDF会导致PDF周围出现黑色边框 [英] Rendering PDF in UIWebView iOS 8, causes a black border around PDF

问题描述

在iOS 8中，将.PDF渲染为 UIWebview 时，显示的是黑色边框和背景（不是整个背景视图）。请注意，这不是UIWebview背景设置为：

In iOS 8, when rendering a .PDF into a UIWebview there is a black border and background around the PDF displayed (not the whole background view). Note this is not the UIWebview background which is set to:

myWebView.opaque = NO;
myWebView.backgroundColor = [UIColor clearColor];

< iOS8，（.PDF周围没有黑色边框彩色背景）

This is not present in < iOS8, (no black bordering coloured background around the .PDF)

其他有经验的人可以对此有所了解吗？

Anyone else experienced this who could shed some light on this?

我将我的PDF加载到Web视图中就像这样..

Im loading my PDF into the Web view like so..

- (void)viewWillAppear:(BOOL)animated
{

    [super viewWillAppear:animated];
    if (self.pdfData != nil && self.viewHasUnloaded == YES) {
        self.viewHasUnloaded = NO;
        [self.webView loadData:self.pdfData MIMEType:@"application/pdf" textEncodingName:@"utf-8" baseURL:nil];
    }
}

推荐答案

转关闭WebKitDiskImageCacheEnabled并且黑色边框消失：

Turn off WebKitDiskImageCacheEnabled and the black border goes away:

在applicationDidFinishLaunchingWithOptions中添加以下行：

In applicationDidFinishLaunchingWithOptions add the following lines:

[[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"WebKitDiskImageCacheEnabled"];
[[NSUserDefaults standardUserDefaults] synchronize];

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