首页 \ 问答 \ 使用Native iOS App中的变量调用Javascript函数(Calling Javascript Function With Variables from Native iOS App)

使用Native iOS App中的变量调用Javascript函数(Calling Javascript Function With Variables from Native iOS App)

 我目前有一个成功加载html文件的Web视图。 我有这样做的方法看起来像：  
- (EmailView *)loadHTMLIntoEmailView:(EmailView *)emailView
{
    NSString *path = [[NSBundle mainBundle] pathForResource:@"inlineAttachmentTemplate" ofType:@"html"];
    NSData *htmlData = [NSData dataWithContentsOfFile:path];
    NSString *resourceURL = [[NSBundle mainBundle] resourcePath];
    resourceURL = [resourceURL stringByReplacingOccurrencesOfString:@"/" withString:@"//"];
    resourceURL = [resourceURL stringByReplacingOccurrencesOfString:@" " withString:@"%20"];
    NSURL *baseURL = [NSURL URLWithString:[NSString stringWithFormat:@"file:/%@//",resourceURL]];

    [emailView.webView loadData:htmlData MIMEType:@"text/html" textEncodingName:@"UTF-8" baseURL:baseURL];
    return emailView;
 }
 
 我看到的html文件如下：  
<!doctype html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <link rel="stylesheet" href="inlineAttachmentTemplateStyling.css">

<script>
function myFunction()
   {
    document.write("Hello from my html file!!!!");

   }
</script>      

</head>
<body id="body">
 <div id="container">
     <img id="testImage" src="fauxImageAttachment2.JPG" />
 </div><!-- #container -->
</body>
</html>
 
 这适用于图像显示在webview中。 如果我将document.write从函数中取出并将其直接放在脚本标记内，则文本将显示在webview中。 但是，我需要能够调用一个函数（来自我的Objective C方法），该函数允许文本显示在webview中，最终我还需要传递这个函数一些变量。 目前，我甚至无法弄清楚如何调用javascript函数。  
 我看了这个例子， 你能用PhoneGap和iOS调用本机代码（不是回调）中的javascript函数吗？ ，并尝试将以下行添加到我的目标C方法：  
    [emailView.webView stringByEvaluatingJavaScriptFromString:@"myFunction()"];
 
 但是这不会调用函数...或者至少文本没有出现在webview中。 
 我是一个新手程序员，根本不了解javascript - 有人能突出我做错了什么吗？ 

I currently have a web view which successfully loads an html file. The method I have that does this looks like: 
- (EmailView *)loadHTMLIntoEmailView:(EmailView *)emailView
{
    NSString *path = [[NSBundle mainBundle] pathForResource:@"inlineAttachmentTemplate" ofType:@"html"];
    NSData *htmlData = [NSData dataWithContentsOfFile:path];
    NSString *resourceURL = [[NSBundle mainBundle] resourcePath];
    resourceURL = [resourceURL stringByReplacingOccurrencesOfString:@"/" withString:@"//"];
    resourceURL = [resourceURL stringByReplacingOccurrencesOfString:@" " withString:@"%20"];
    NSURL *baseURL = [NSURL URLWithString:[NSString stringWithFormat:@"file:/%@//",resourceURL]];

    [emailView.webView loadData:htmlData MIMEType:@"text/html" textEncodingName:@"UTF-8" baseURL:baseURL];
    return emailView;
 }
 
The html file I have looks like: 
<!doctype html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <link rel="stylesheet" href="inlineAttachmentTemplateStyling.css">

<script>
function myFunction()
   {
    document.write("Hello from my html file!!!!");

   }
</script>      

</head>
<body id="body">
 <div id="container">
     <img id="testImage" src="fauxImageAttachment2.JPG" />
 </div><!-- #container -->
</body>
</html>
 
This works in that the image appears in the webview. If I take the document.write out of a function and just place it directly inside the script tags, then the text appears in the webview. However, I need to be able to call a function (from my Objective C method) that allows the text to be displayed in the webview, and ultimately I also need to pass this function some variables. At the moment, I cannot even figure out how to get the javascript function to be called.  
I looked at this example, Can you call a javascript function from native code (not in a callback) using PhoneGap and iOS?, and tried adding the following line to my objective C method: 
    [emailView.webView stringByEvaluatingJavaScriptFromString:@"myFunction()"];
 
But this does not call the function... or at least the text does not appear in the webview.
 I'm quite a novice programmer and don't know much about javascript at all - can anyone highlight what I am doing incorrectly?

原文：https://stackoverflow.com/questions/18513213

更新时间：2022-03-10 10:03

最满意答案

 Memcached没有Windows官方dll版本。  
 您可以自己从PECL源代码编译它，也可以使用其他人预编译的dll： http ： //shikii.net/blog/installing-memcached-for-php-5-3-on-windows-7/  
 另请参见： Windows上的Memcached（不是memcache）PHP扩展 

Memcached has no official dll release for windows. 
You can either compile it yourself from the PECL source or use a precompiled dll from someone else : http://shikii.net/blog/installing-memcached-for-php-5-3-on-windows-7/ 
See also : Memcached (not memcache) PHP extension on Windows

使用Native iOS App中的变量调用Javascript函数(Calling Javascript Function With Variables from Native iOS App)

最满意答案

相关问答

Memcached没有听到过期时间(Memcached not listening to expiration time)[2024-03-12]

PHP Memcached完全向后兼容Memcache吗？(Is PHP Memcached fully backwards compatible with Memcache?)[2022-03-26]

memcached的Python？(Python memcached?)[2022-05-31]

无法在Ruby中要求'memcached'(Unable to require 'memcached' in Ruby)[2023-09-17]

手动显示memcached是一个有效的库(Manual shows memcached is a valid library)[2023-12-24]

如何使用FOSUSERBUNDLE和MEMCACHED？(how to use FOSUSERBUNDLE and MEMCACHED?)[2022-05-30]

使用节点memcached解码压缩数据(Decode compressed data using node memcached)[2022-04-10]

Nginx和memcached(Nginx and memcached)[2022-05-10]

在XAMPP上使用memcached(Using memcached on XAMPP)[2022-03-11]

在PHP中，Memcached（本机库）与Memcached相同吗？(In PHP, is Memcached (the native library) the same as Memcached?)[2021-12-14]

相关文章

最新问答