WebService请求

soap字符串格式

<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">    <soap:Header>    </soap:Header>      <soap:Body>    //这里面才是重点        <方法名 xmlns="webservice命名空间">        <参数名>值</参数名>              <参数名>值</参数名>        </方法名>    </soap:Body></soap:Envelope>

按上面的格式拼接soap字符串soapMessage，然后就可以请求了

NSString *soapMessage = @"";NSURL *url = [NSURL URLWithString:webUrl];NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];NSString *msgLength = [NSString stringWithFormat:@"%lu", (unsigned long)[soapMessage length]];//可有可无 有默认值//    [theRequest addValue: @"application/soap+xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];//    [theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];[theRequest setHTTPMethod:@"POST"];[theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];NSURLSession *session = [NSURLSession sharedSession];NSURLSessionDataTask *task = [session dataTaskWithRequest:theRequest completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {    if (error) {        self.failureBlock(error);    } else {        //请求出来的结果是xml格式，解析        [self parseXML:data];    }}];[task resume];

请求结果示例

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">  <soap:Body>    <ns2:xxx xmlns:ns2="xxx">      <return>        <rslt>          <ret_code>xxx</ret_code>          <ret_msg>xxx</ret_msg>          <ret_result_cnt>xxx</ret_result_cnt>        </rslt>        <rslt>          xxx        </rslt>      </return>    </ns2:xxx>  </soap:Body></soap:Envelope>

使用kissXML解析xml

NSString *rsltStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];rsltStr = [self stringByDecodingHTMLEntitiesInString:rsltStr];//KissXML是基于DOM的解析方式DDXMLDocument *rsltDoc = [[DDXMLDocument alloc] initWithXMLString:rsltStr options:0 error:nil];//XPath是XML中的定位语法，可以快速定位到Xml中的节点或者属性；//"//xx" 表示从整个xml文档中查找，而不考虑当前节点位置NSArray *rsltArr = [rsltDoc nodesForXPath:@"//rslt" error:nil];NSXMLElement *rslt = nil;if (rsltArr.count > 0) {    rslt = rsltArr[0];}NSString *ret_code = [[rslt elementForName:@"ret_code"] stringValue];NSString *ret_msg = [[rslt elementForName:@"ret_msg"] stringValue];NSString *ret_result_cnt = [[rslt elementForName:@"ret_result_cnt"] stringValue];NSDictionary *dic = @{@"code":ret_code,@"msg":ret_msg,@"cnt":ret_result_cnt};self.successBlock(dic);

但是我的请求结果却是这样的：

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">  <soap:Body>    <ns2:xxx xmlns:ns2="xxx">      <return>&lt;rslt&gt;&lt;ret_code&gt;xxx&lt;/ret_code&gt;&lt;ret_msg&gt;xxx&lt;/ret_msg&gt;&lt;ret_result_cnt&gt;xxx&lt;/ret_result_cnt&gt;&lt;/rslt&gt;</return>    </ns2:xxx>  </soap:Body></soap:Envelope>

所以在开始之前有个方法stringByDecodingHTMLEntitiesInString将字符串转换一下：

string = [string stringByReplacingOccurrencesOfString:@"&lt;" withString:@"<"];string = [string stringByReplacingOccurrencesOfString:@"&gt;" withString:@">"];

ok! so easy!