post 传字典

NSString *urlStr = [GNConfig
loadWebUrlWithKey:@"KeyLoginUrl"];

NSString *paraStr = [NSString
stringWithFormat:@"user=%@&pwd=%@",user.userid,user.passWord];
NSData *postData = [paraStr
dataUsingEncoding:NSASCIIStringEncoding
allowLossyConversion:YES];
NSString *postLength = [NSString
stringWithFormat:@"%zd", [postData
length]];

NSMutableURLRequest *request = [[NSMutableURLRequest
alloc] init];
[request setURL:[NSURL
URLWithString: urlStr]];
[request setCachePolicy:NSURLRequestReloadIgnoringCacheData];
[request setTimeoutInterval:
10];
[request setHTTPShouldHandleCookies:FALSE];
[request setValue:postLength
forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:postData];
[request setHTTPMethod:@"POST"];