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我正在寻找如何从 HTML 到 iPHone 本机 obj-c 获取“一个”和“公园”字符串值（这是 UIwebview 上的 image_map 坐标可点击点）。我已将代码放入获取字符串值但它没有响应...请检查并帮助

我已经用可能的答案更新了代码。如果图像地图和地图可点击表面更多，这将是复杂的。任何有关编码和解释的帮助和建议都将受到赞赏。提前致谢

更新： *对于 HTML 代码*

<html>
<body onload="anyFunction();">
<script language="javascript">

function anyFunction(){
window.location='value';
}

function callFromActivity(msg){
document.getElementById("circle").innerHTML = 'onclick';
    }
</script> 

 <img src="map_new123.png" width="1500" height="731" border="0" usemap="#map" />
 <a href="didTap://button1">
<map name="map">
     //want ot get below onclick values one and park in to objective c .....
<area shape="circle" coords="1047,262,26" onclick="one" />
<area shape="circle" coords="1118,590,24" onclick="park" />
</a></map>

对于 obj-c

 - (BOOL)webView:(UIWebView*)aWebView shouldStartLoadWithRequest:(NSURLRequest*)request  navigationType:(UIWebViewNavigationType)navigationType
{
NSString *absoluteUrl = [[request URL] absoluteString];
if ([absoluteUrl isEqualToString:@"didTap://button1"]) {
  //        
UIAlertView *myAlert = [[[UIAlertView alloc] initWithTitle:@"Connectivity!" message:@" Hello" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil] autorelease];
    [myAlert show];

//the below line of code should get the string but its not working

 NSString* html = [myWeb stringByEvaluatingJavaScriptFromString:@"document.getElementById('circle').onclick"]; 

    return NO;
}
return YES; }

可能的答案

//Html coding
<area  shape="circle" coords="1047,262,26" onclick="one" href="didTap://button1" value="one" />
<area  shape="circle" coords="1118,590,24" onclick="park" href="didTap://button2"  value="park"/>


  //Obj C

- (BOOL)webView:(UIWebView*)aWebView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType
{
NSString *absoluteUrl = [[request URL] absoluteString];
if ([absoluteUrl isEqualToString:@"didTap://button1"]) {
    UIAlertView *myAlert = [[[UIAlertView alloc] initWithTitle:@"Selected  Location!"  message:@"One" delegate:self cancelButtonTitle:@"GetDirection"  otherButtonTitles:@"Quit",nil] autorelease];
    [myAlert show];

    return NO;
 }
 if ([absoluteUrl isEqualToString:@"didTap://button2"]) 
 {
     UIAlertView *myAlert = [[[UIAlertView alloc] initWithTitle:@"Selected  Location!"  message:@"Park" delegate:self cancelButtonTitle:@"GetDirection"  otherButtonTitles:@"Quit",nil] autorelease];
     [myAlert show];
     return NO;
 }
return YES;
}
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1 回答 1

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我不确定“从 HTML 获取”到底是什么意思。最可能的解决方案是使用UIWebViewjavascript 方法：-(NSString*)stringByEvaluatingJavaScriptFromString:

如果您想innerHTML从 id 为“test”的标签中获取：

NSString *innerHTML = [aWebview stringByEvaluatingJavaScriptFromString:@"document.getElementById('test').innerHTML"];
于 2012-05-29T10:31:20.043 回答