UIWebView and local css file

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I want to style a web page meant for the desktop so that it is presentable on a UIWebView on iPhone. I do not have access to the web server from which the pages originate. I

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暗喜

2020-12-13 03:57
SWIFT 3

If you (like me) only use a html snippet (not a complete web page) you need to add your local css file in the header of the html snippet.

I therefore define a html header like this:
```
let htmlHeader = "<html> \n <head> \n <link href=\"default.css\" rel=\"stylesheet\" type=\"text/css\" /> \n </head> \n <body> \n"
```
and a footer like this:
```
let htmlFooter = "</body> \n </html>"
```
Then find the baseURL for the css like this:
```
let baseURLForCss = Bundle.main.url(forResource: "default", withExtension: "css")
```
And load the html snippet with your own css like this:
```
webView.loadHTMLString(String.init(format: "%@%@&@", htmlHeader, htmlSnippet, htmlFooter), baseURL: baseURLForCss)
```
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误落风尘

2020-12-13 04:03
You can load CSS from local project directory
```
NSString *path = [[NSBundle mainBundle] bundlePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
[webView loadHTMLString:htmlString baseURL:baseURL];
```
detail info check this site : http://iphoneincubator.com/blog/windows-views/uiwebview-revisited
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感动是毒

2020-12-13 04:03

Your code should work, if you choose index 0 of the found elements:

    NSString *js = @"document.getElementsByTagName('link')[0].setAttribute('href','";
    NSString *js2 = [js stringByAppendingString:cssPath];
    NSString *finalJS = [js2 stringByAppendingString:@"');"];
    [webview stringByEvaluatingJavaScriptFromString:finalJS];

You missed [0]

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走了就别回头了

2020-12-13 04:15
Unfortunately UIWebView doesn't provide an API for intercepting and modifying the requests that it makes while loading a resource. This means that any approach you try will be hack-ish to a certain extent.

The first approach I would try is:
- Provide your own UIWebViewDelegate delegate on the view.
- Implement -webView:shouldStartLoadWithRequest:navigationType: and return NO when you spot the CSS requests being made.
- Once the view has finished loading the main resource, use -stringByEvaluatingJavaScriptFromString: to inject JavaScript into the page that dynamically loads/sets the stylesheet that you want to use.
In the JavaScript I would create an entirely new <link> element/node on the document instead of trying to modify the existing one.
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