Question

我是iphone的初学者。我想为我的应用程序创建一个登录页面。我无法弄清楚如何连接到php页面并从mysql数据库中检索相应的数据到iphone.could任何人指导我如何去做吧。

Answer 1

iphone与php和mysql之间的连接有什么关系？

PHP将在Web服务器上运行，可能在某些计算机上安装了apache并且它将连接到MySQL数据库..并且您将使用浏览器从您的iphone访问该php页面。除了提供浏览器之外，不确定iphone中除了提供浏览器之外还有哪些部分

Answer 2

您可能需要查看NSURLRequest，您可以将其与NSURLConnection一起发送，例如GET- URL的参数。然后，您可以实施NSURLConnectionDelegate以响应传入的数据：

1）设置连接

receivedData =[NSMutableData data];
NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:url] 
                                          cachePolicy:NSURLRequestUseProtocolCachePolicy
                                      timeoutInterval:20.0];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

2）在self中设置委托方法：

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse*)response {
    NSHTTPURLResponse * httpResponse = (NSHTTPURLResponse *) response;  

    if([httpResponse statusCode]==200)
       [receivedData setLength:0];
    else
       NSLog(@"Http-Reponse %u",[httpResponse statusCode]);
       // HANDLE ERROR!
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
   // append the new data to the receivedData
   // receivedData is declared as a method instance elsewhere
   [receivedData appendData:data];
}



- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
   // HANDLE THE CONNECTION ERROR
   // release the connection, and the data object
   [connection release];
   // receivedData is declared as a method instance elsewhere
   [receivedData release];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
     // receivedData contains the data
     // convert to string:
     NSLog(@"finished loading: %@",[[[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding] autorelease]);
     [connection release];
     [receivedData release];
}

Answer 3

您希望将身份验证功能公开为Web服务，然后使用Felix L.发布的URL加载代码启动与Web服务的实际连接。

您可能希望以XML格式从服务器发送响应，如果是这样，您将使用NSXMLParser解析该响应，否则您只需以您喜欢的任何格式发送响应并进行适当的解析。

如何从iphone访问mysql

3 个答案: