手把手教你做iphone的soap应用(webservice)

最近研究了下soap,找不到iphone上好用的soap代码.发现坛子，关于soap的东西也不多，就把自己写的贴出来，请大家批评指正吧。

用到的提供soap接口的网址是:http://www.Nanonull.com/TimeService/这个页面有多个方法可以通过soap调用,页面上也有说明.如果用IE的浏览器还能看到此网页提供的wsdl文件.要做soap的webservice首先要了解一些关于webservice和soap的一些基本知识.下面几个网址可能会帮你快速入门.

soap教程:http://www.w3school.com.cn/soap/index.asp

使用WSDL发布WebService:http://blog.csdn.net/meiqingsong/archive/2005/04/04/336057.aspx

为了便于理解,我先讲下soap的大体原理:我们在iphone封装soap请求信息,发送到某个提供soap服务的服务器,如下例中我们用到的http://www.Nanonull.com/TimeService/.服务器能接受和识别soap请求,当它接到请求,就根据客户端的请求情况调用服务器上的某个函数,并将函数返回结果封装成soap反馈信息发送给客户端.客户端接收到soap反馈信息后,进行解析处理,以用户能理解的形式呈现给用户.整个过程就这么简单.

好了,假设现在你已经有关于soap的基础知识(没有也没关系,看了例子,再理解就更好理解了),下面我们开始做soap的例子.

第一步,建一个Hello_SOAP项目.用IB将Hello_SOAPViewController.xib做成如下图的界面



然后在Hello_SOAPViewController.h中添加如下代码

复制代码 @interface Hello_SOAPViewController : UIViewController { IBOutlet UITextField *nameInput; IBOutlet UILabel *greeting; NSMutableData *webData; NSMutableString *soapResults; NSXMLParser *xmlParser; BOOL recordResults; } @property(nonatomic, retain) IBOutlet UITextField *nameInput; @property(nonatomic, retain) IBOutlet UILabel *greeting; @property(nonatomic, retain) NSMutableData *webData; @property(nonatomic, retain) NSMutableString *soapResults; @property(nonatomic, retain) NSXMLParser *xmlParser; -(IBAction)buttonClick: (id) sender; - (void)getOffesetUTCTimeSOAP;

然后在Hello_SOAPViewController.xib中将两个输出口和一个动作连接好,这个不用手把手吧?

在Hello_SOAPViewController.m文件中加入以下方法 :

复制代码 - (void)getOffesetUTCTimeSOAP { recordResults = NO; //封装soap请求消息 NSString *soapMessage = [NSString stringWithFormat: @"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" "<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/\">\n" "<soap:Body>\n" "<getOffesetUTCTime xmlns=\"http://www.Nanonull.com/TimeService/\">\n" "<hoursOffset>%@</hoursOffset>\n" "</getOffesetUTCTime>\n" "</soap:Body>\n" "</soap:Envelope>\n",nameInput.text ]; NSLog(soapMessage); //请求发送到的路径 NSURL *url = [NSURL URLWithString:@"http://www.nanonull.com/TimeService/TimeService.asmx"]; NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url]; NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMessage length]]; //以下对请求信息添加属性前四句是必有的，第五句是soap信息。 [theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"]; [theRequest addValue: @"http://www.Nanonull.com/TimeService/getOffesetUTCTime" forHTTPHeaderField:@"SOAPAction"]; [theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"]; [theRequest setHTTPMethod:@"POST"]; [theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]]; //请求 NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; //如果连接已经建好，则初始化data if( theConnection ) { webData = [[NSMutableData data] retain]; } else { NSLog(@"theConnection is NULL"); } }

这个方法作用就是封装soap请求,并向服务器发送请求.

代码有注释.不重复讲解.soap并不难,难的是没有案例告诉我们怎么把其它平台的soap移植过来,这里我给出了代码,我相信对iphone开发人员的话应该能看懂了.我在下面会把此案例的源代码附上.如果自己做不出来再看我的代码.如果我这样讲您觉得不够细,那说明您的iphone开发还不是太深入,那么您应该用不到soap技术.可以飘过了.

下面的代码是接收信息并解析,显示到用户界面

复制代码 -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { [webData setLength: 0]; NSLog(@"connection: didReceiveResponse:1"); } -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [webData appendData:data]; NSLog(@"connection: didReceiveData:2"); } //如果电脑没有连接网络，则出现此信息（不是网络服务器不通） -(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"ERROR with theConenction"); [connection release]; [webData release]; } -(void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@"3 DONE. Received Bytes: %d", [webData length]); NSString *theXML = [[NSString alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding]; NSLog(theXML); [theXML release]; //重新加載xmlParser if( xmlParser ) { [xmlParser release]; } xmlParser = [[NSXMLParser alloc] initWithData: webData]; [xmlParser setDelegate: self]; [xmlParser setShouldResolveExternalEntities: YES]; [xmlParser parse]; [connection release]; //[webData release]; } -(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *) namespaceURI qualifiedName:(NSString *)qName attributes: (NSDictionary *)attributeDict { NSLog(@"4 parser didStarElemen: namespaceURI: attributes:"); if( [elementName isEqualToString:@"getOffesetUTCTimeResult"]) { if(!soapResults) { soapResults = [[NSMutableString alloc] init]; } recordResults = YES; } } -(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { NSLog(@"5 parser: foundCharacters:"); if( recordResults ) { [soapResults appendString: string]; } } -(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { NSLog(@"6 parser: didEndElement:"); if( [elementName isEqualToString:@"getOffesetUTCTimeResult"]) { recordResults = FALSE; greeting.text = [[[NSString init]stringWithFormat:@"第%@时区的时间是: ",nameInput.text] stringByAppendingString:soapResults]; [soapResults release]; soapResults = nil; NSLog(@"hoursOffset result"); } } - (void)parserDidStartDocument:(NSXMLParser *)parser{ NSLog(@"-------------------start--------------"); } - (void)parserDidEndDocument:(NSXMLParser *)parser{ NSLog(@"-------------------end--------------"); }

说明下:

复制代码 -(void)connectionDidFinishLoading:(NSURLConnection *)connection

这个方法是存储接收到的信息

复制代码 -(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName

方法是显示接收的信息.

以上代码已经包括所有用到的代码.

如果一切顺利,应该有如下界面

1.打开界面



2.输入请求的时区



3.显示服务器反馈结果



下面给个整个工程的源码,如果您把上面代码贴上运行不出来,直接运行我的工程吧.有误地方请指正,有问题可回帖交流.


Hello_SOAP-getOffesetUTCTime.zip (62 K) 下载次数:4023