如何控制 UIWebView 的 javascript [英] How to control UIWebView's javascript
问题描述
就是 UIWebview 和 UIView 上的切换按钮.
It is that UIWebview and toggle button on UIView.
网页包含 javascript.
WebPage includes javascript.
我想控制 UIWebView 的 javascript.
I want to control UIWebView's javascript.
我想要的是，每当 UIView 上的 Button 被切换时，javascript 就会打开或关闭.
What I want is that whenever Button on UIView is toggled, javascript is turned on or off.
有可能吗?
如果是这样，我该怎么办?很遗憾我不知道.
If so, how can i do? It is sad that I don't have idea.
这是我的javascript代码:
This is my javascript code:
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *var = nil;
var = @"<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01 Transitional//EN' 'http://www.w3.org/TR/html4/loose.dtd'>"
"<html> "
" <head> "
" <title> New Document </title> "
"<script type='text/javascript'> "
"function colorChange(){ "
" var id=document.getElementById('yellow'); "
" var backcolor = id.style.backgroundColor; "
" "
" if (backcolor != '') "
" { "
" id.style.backgroundColor = ''; "
" }else{ "
" id.style.backgroundColor = '#ffff00'; "
" } "
" "
"} "
"</script> "
" </head> "
" <body> "
"<script type='text/javascript'> "
"</script> "
" "
"<span id='yellow' ><a href=\"javascript:void(0)\" onclick='colorChange();'><font size=12>text</font></a></span></head></html>";
[self.webView loadHTMLString:var baseURL:nil];
}
推荐答案
不要认为可以为 UIWebView 禁用 JavaScript.
Don't think it's possible to disable JavaScript for a UIWebView.
但是你可以使用UIWebView的stringByEvaluatingJavaScriptFromString:方法，来执行特定的JS代码，所有一个JS函数等
But you can use the stringByEvaluatingJavaScriptFromString: method of UIWebView, in order to execute specific JS code, all a JS function, etc.
- (NSString *)stringByEvaluatingJavaScriptFromString:(NSString *)script;
例如:
[ self.webView stringByEvaluatingJavaScriptFromString: @"colorChange();" ];
如果您想停用您设置的 onclick()，例如，您可以使用 stringByEvaluatingJavaScriptFromString: 设置一个全局变量，并在您的colorChange 函数.如果它有一些价值，就做点什么，否则什么都不做.
If you want to deactivate the onclick() you've set, you can for instance set a global variable with stringByEvaluatingJavaScriptFromString:, and check for that variable in your colorChange function. If it has some value, do something, otherwise, do nothing.
var colorChangeEnabled = true;
function colorChange()
{
if( colorChangeEnabled == false ) return;
...
所以:
[ self.webView stringByEvaluatingJavaScriptFromString: @"colorChangeEnabled = false;" ];
这篇关于如何控制 UIWebView 的 javascript的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
