ios开发中和web数据的交互的总结(一)

最新推荐文章于 2025-11-24 16:30:49 发布

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#ios #web #soap #encoding #服务器 #url

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本文探讨了iOS应用在与Web服务器进行数据交换时的几种常见方法，包括SOAP、HTTP Post和GET请求，并详细说明了每种方法的优缺点及应用场景，特别强调了同步请求对于及时响应用户操作的优势。

在ios开发中，总结下和web数据的交换的一点经验，主要用webservers，http post ，get

1，iphone条用webservers接口——有soap，http post ，http get，三种方法

1）soap——自己构建一个xml的请求，这个比较烦麻烦

 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"
							 "<getLossDogInfomationOrderByLossTimer xmlns=\"http://www.027aigou.com/\">\n"
							 "</getLossDogInfomationOrderByLossTimer>\n"
							 "</soap:Body>\n"
							 "</soap:Envelope>\n",@"5"];
    NSURL *url = [NSURL URLWithString:@"http://www.027aigou.com/DesktopModules/webservice/webservice.asmx"];
    NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
	NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMessage length]];
	
    
	[theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    
	[theRequest addValue: @"http://www.027aigou.com/getLossDogInfomationOrderByLossTimer" forHTTPHeaderField:@"SOAPAction"];
	
	[ theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];
    
	[ theRequest setHTTPMethod:@"POST"];
    
	[ theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
	//NSLog(@"*******************请求哦2！");
	
	//请求
	NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
	//NSLog(@"*******************请求哦3！");
	
	//如果连接已经建好，则初始化data
	if( theConnection )
	{
		webData = [[NSMutableData data] retain];
		//NSLog(@"*******************请求哦！");
		
	}
	else
	{
		IsFinish = YES;
		//NSLog(@"theConnection is NULL");
	}
    
}

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
	[webData setLength: 0];
	
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
	[webData appendData:data];
	
}
//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
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"连接服务器失败，请稍后再试！"
                                                   delegate:self
                                          cancelButtonTitle:@"好的，我知道了" otherButtonTitles:nil];
    [alert show];
    [alert release];
    
	[connection release];
	[webData release];
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
       
    //得到一个xml结果
    //获取的内容不能为空
    if (webData!=nil) {
        
       
        [connection release];
    
        //重新加載xmlParser
        if( xmlParser )
        {
            [xmlParser release];
        }
    	
        xmlParser = [[NSXMLParser alloc] initWithData: webData];
        [xmlParser setDelegate: self];
        [xmlParser setShouldResolveExternalEntities: YES];
        [xmlParser parse];
    }
    else
    {
        return;
    }

	[webData release];
        
}

缺点：这是一个异步请求，不能即使的得到结果，决定下一步执行的操作。不利于用于注册和登陆

2，同步请求：

同步是指当客户端调用post/get的方式的函数向服务器发出数据请求后，该函数不会直接返回，只有得到服务器响应或者请求时间timeout之后才会返回继续执行其它任务——用于及时的相应用户操作

  
    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"
							 "<getLossDogInfomationOrderByLossTimer xmlns=\"http://www.027aigou.com/\">\n"
							 "</getLossDogInfomationOrderByLossTimer>\n"
							 "</soap:Body>\n"
							 "</soap:Envelope>\n",@"5"];
    NSURL *url = [NSURL URLWithString:@"http://www.027aigou.com/DesktopModules/webservice/webservice.asmx"];
    NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
	NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMessage length]];
	
    
	[theRequest addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    
	[theRequest addValue: @"http://www.027aigou.com/getLossDogInfomationOrderByLossTimer" forHTTPHeaderField:@"SOAPAction"];
	
	[ theRequest addValue: msgLength forHTTPHeaderField:@"Content-Length"];
    
	[ theRequest setHTTPMethod:@"POST"];
    
	[ theRequest setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
	//NSLog(@"*******************请求哦2！");
		NSURLResponse *respone;
	NSError *error;
	NSData*myReturn=[NSURLConnection sendSynchronousRequest:theRequest returningResponse:&theRequest error:error];
	NSLog(@"%@", [[NSString alloc] initWithData:myReturn encoding:NSUTF8StringEncoding]);