post请求！

//    NSString *post = [NSString stringWithFormat:nil, 4, opinionTextView.text];

//    NSData *postData=[post dataUsingEncoding:NSUTF8StringEncoding];

//    NSMutableURLRequest *connectionRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:nil]];

//    [connectionRequest setHTTPMethod:@"POST"];

//    [connectionRequest setTimeoutInterval:100.0];

//    [connectionRequest setCachePolicy:NSURLRequestUseProtocolCachePolicy];

//    [connectionRequest setHTTPBody:postData];

//    

//    //输出数据

//    NSData *data=[NSURLConnection sendSynchronousRequest:connectionRequest returningResponse:nil error:nil];

//    NSString *stringdata=[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

//    NSLog(@"%@", stringdata);

    

    NSString *post = @"name=admin&password=123456";

    NSData *postData=[post dataUsingEncoding:NSUTF8StringEncoding];

    NSMutableURLRequest *connectionRequest = [NSMutableURLRequest

                                              requestWithURL:[NSURL URLWithString:@"http://127.0.0.1/test/test.php"]];

    [connectionRequest setHTTPMethod:@"POST"];

    [connectionRequest setTimeoutInterval:100.0];

    [connectionRequest setCachePolicy:NSURLRequestUseProtocolCachePolicy];

    [connectionRequest setHTTPBody:postData];

    NSData *data=[NSURLConnectionsendSynchronousRequest:connectionRequest returningResponse:nilerror:nil];

    NSString *stringdata=[[NSStringalloc] initWithData:data encoding:NSUTF8StringEncoding];

    NSLog(@"~~~~~%@~~~~",stringdata);