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Web服务n sqlite

sqlite iphone

-2

Sabby · 技术社区 · 15 年前

请帮助我,并提供完整的代码如何做到这一点。

1 回复 | 直到 15 年前

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jfalexvijay 15 年前

Webservices可以是Java、PHP、.NET等语言。。。但你必须用同样的程序来提出请求。在这里,我给出了示例代码,用于发出请求并从webservices获取响应。


-(void)performRequest{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"url"]];
    NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMessage length]];
    [request addValue: @"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    [request addValue: soapAction forHTTPHeaderField:@"SOAPAction"];
    [request addValue: msgLength forHTTPHeaderField:@"Content-Length"];
    [request setHTTPMethod:@"POST"];
    [request setHTTPBody: [soapMessage dataUsingEncoding:NSUTF8StringEncoding]];
    NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
    if( theConnection )
    {
        webData = [[NSMutableData data] retain];
    }
    else
    {
        NSLog(@"theConnection is NULL");
    }
    [pool release];
}

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
    [webData setLength: 0];
    self.resultArray = [[NSMutableArray alloc] init];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
    [webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
    NSLog(@"ERROR with theConenction");
    NSDictionary *errorDic = [NSDictionary dictionaryWithObject:error forKey:@"error"];
    [self.resultArray addObject:errorDic];
    [connection release];
    [webData setLength:0];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
    NSLog(@"DONE. Received Bytes: %d", [webData length]);
    NSString *theXML = [[NSString alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding];
    NSLog(@"%@", theXML);
    [theXML release];
    if([webData length] > 0){
        parser = [[NSXMLParser alloc] initWithData:webData];
        [parser setDelegate:self];
        [parser parse]; 
    }
}

有一些委托方法。你必须使用以下指定的方法;


1. - (void)parserDidStartDocument:(NSXMLParser *)parser

2. - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict

3. - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string

4. - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName

5. - (void)parserDidEndDocument:(NSXMLParser *)parser

6. - (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError

在第二个委托方法中,您将得到元素名(xml标记名)。在第三个委托方法中,您将获得元素名的值。