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JS-OC交互专题1-截取网站字符串

2016-01-25 10:50 501 查看

oc文件

- (void)viewDidLoad {
[super viewDidLoad];
_webView.delegate = self;
_webView.backgroundColor = [UIColor clearColor];
_webView.scalesPageToFit =YES;
NSString *basePath = [[NSBundle mainBundle]bundlePath];
NSString *helpHtmlPath = [basePath stringByAppendingPathComponent:@"jsIOS.html"];
NSURL *url = [NSURL fileURLWithPath:helpHtmlPath];
NSURLRequest *request=[NSURLRequest requestWithURL:url];
[_webView loadRequest:request];
}
//html页面的js动作触发时运行
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType
{
//获取请求的绝对路径.
NSString *urlString = [[request URL] absoluteString];
urlString = [urlString stringByRemovingPercentEncoding];
NSLog(@"urlString=%@",urlString);
//提交请求时候分割参数的分隔符
NSArray *urlComps = [urlString componentsSeparatedByString:@":@@"];
if([urlComps count] && [[urlComps objectAtIndex:0] isEqualToString:@"objc"]){
NSArray *arrFucnameAndParameter = [(NSString*)[urlComps objectAtIndex:1] componentsSeparatedByString:@":/"];
NSString *funcStr = [arrFucnameAndParameter objectAtIndex:0];

if (1 == [arrFucnameAndParameter count]){
// 没有参数
if([funcStr isEqualToString:@"doFunc1"]){
/*调用本地函数1*/
NSLog(@"doFunc1");
}
}
else{
//有参数的
if([funcStr isEqualToString:@"getParam1:withParam2:"]){
[self getParam1:arrFucnameAndParameter[1] withParam2:arrFucnameAndParameter[2]];
NextViewController * vc = [[NextViewController alloc]init];
[self presentViewController:vc animated:YES completion:nil];
}
}
return NO;
}
return TRUE;
}
-(void)getParam1:(NSString*)str1 withParam2:(NSString*)str2
{
NSLog(@"收到html传过来的参数：str1=%@,str2=%@",str1,str2);
}

jsIOS.html

</DOCTYPE html>
<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv="content-type">
<title>js调用oc</title>
<script type="text/javaScript">
function testClick(cmd)
{
var str1=document.getElementById("text1").value;
var str2=document.getElementById("text2").value;
window.location.href="objc:@@"+cmd+":/"+EncodeUtf8(str1)+":/"+EncodeUtf8(str2);
}

// 字符串转换utf-8
function EncodeUtf8(s1)
{
// escape函数用于对除英文字母外的字符进行编码。如“Visit W3School!”->"Visit%20W3School%21"
var s = escape(s1);
var sa = s.split("%");//sa[1]=u6211
var retV ="";
if(sa[0] != "")
{
retV = sa[0];
}
for(var i = 1; i < sa.length; i ++)
{
if(sa[i].substring(0,1) == "u")
{
retV += Hex2Utf8(Str2Hex(sa[i].substring(1,5)));
if(sa[i].length>=6)
{
retV += sa[i].substring(5);
}
}
else retV += "%" + sa[i];
}
return retV;
}
function Str2Hex(s)
{
var c = "";
var n;
var ss = "0123456789ABCDEF";
var digS = "";
for(var i = 0; i < s.length; i ++)
{
c = s.charAt(i);
n = ss.indexOf(c);
digS += Dec2Dig(eval(n));

}
//return value;
return digS;
}
function Dec2Dig(n1)
{
var s = "";
var n2 = 0;
for(var i = 0; i < 4; i++)
{
n2 = Math.pow(2,3 - i);
if(n1 >= n2)
{
s += '1';
n1 = n1 - n2;
}
else
s += '0';

}
return s;

}
function Dig2Dec(s)
{
var retV = 0;
if(s.length == 4)
{
for(var i = 0; i < 4; i ++)
{
retV += eval(s.charAt(i)) * Math.pow(2, 3 - i);
}
return retV;
}
return -1;
}
function Hex2Utf8(s)
{
var retS = "";
var tempS = "";
var ss = "";
if(s.length == 16)
{
tempS = "1110" + s.substring(0, 4);
tempS += "10" +  s.substring(4, 10);
tempS += "10" + s.substring(10,16);
var sss = "0123456789ABCDEF";
for(var i = 0; i < 3; i ++)
{
retS += "%";
ss = tempS.substring(i * 8, (eval(i)+1)*8);

retS += sss.charAt(Dig2Dec(ss.substring(0,4)));
retS += sss.charAt(Dig2Dec(ss.substring(4,8)));
}
return retS;
}
return "";
}
</script>
</head>
<body>
<p><input type="text" id="text1" value="我来自ios苹果"/></p>
<p><input type="text" id="text2" value="我来自earth地球"/></p>
<p><input type="button" id="enter" value="enter" onclick="testClick('getParam1:withParam2:');"/></p>
</body>
</html>

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