post请求：

- (void)postRequest {

    NSString *urlString = [NSString stringWithFormat:@"http://f1.netgears.cn:8081/cloudadmin_new/interface/commonQueryDataObject.action"];
    NSURL *url = [NSURL URLWithString:urlString];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    [request setHTTPMethod:@"POST"];
    NSString *str = @"opercode=yfc_intf&operPasswd=yy123&agentCode=fs_nh_yfc&action=queryOnlineUserData&pageNumber=1&framedipaddress=192.168.0.131";
    NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding];
    [request setHTTPBody:data];
    
    //同步post请求
    NSURLResponse * response = nil;
    NSError * error = nil;
    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
    NSString *string = [[NSString alloc]initWithData:returnData encoding:NSUTF8StringEncoding];
    NSLog(@">>>>>>>>>%@",string);
    
    //异步post请求
    NSOperationQueue *MyQueue = [[NSOperationQueue alloc]init];
    [NSURLConnection sendAsynchronousRequest:request queue:MyQueue completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        NSString *string = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@">>>>>>>>>%@",string);
    }];
}

get请求：

- (void)getRequest {

    NSString *urlString = [NSString stringWithFormat:@"http://f1.netgears.cn:8081/cloudadmin_new/interface/commonQueryDataObject.action?opercode=yfc_intf&operPasswd=yy123&agentCode=fs_nh_yfc&action=queryOnlineUserData&pageNumber=1&framedipaddress=192.168.0.131"];
    
    NSURL *url = [NSURL URLWithString:urlString];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    //异步get请求
    NSOperationQueue *MyQueue = [[NSOperationQueue alloc]init];
    [NSURLConnection sendAsynchronousRequest:request queue:MyQueue completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        NSString *string = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@">>>>>>>>>%@",string);
    }];

    //同步get请求
    NSURLResponse * response = nil;
    NSError * error = nil;
    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
    NSString *string = [[NSString alloc]initWithData:returnData encoding:NSUTF8StringEncoding];
    NSLog(@">>>>>>>>>%@",string);
}