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已经考虑了将近 2 周.. 我想要的是将“computedHeartRate.text”发布到 php 文件并将其显示到屏幕上

心率由 Wahoo 产品生成。

大部分代码都是从互联网上复制的，我是 Xcode 的新手，这是我迄今为止所做的：

        NSString *rawStr = [NSString stringWithFormat:@"hb=%@",computedHeartrateLabel.text];
    NSData *data = [rawStr dataUsingEncoding:NSUTF8StringEncoding];

    NSURL *url = [NSURL URLWithString:@"http://localhost:8888/123.php"];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:data];



    NSString *postLength = [NSString stringWithFormat:@"%d", [data length]];
            [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"application/x-www-form-urlencoded"
   forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody:data];
    NSData *urlData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSLog(@"Succeeded! Received %d bytes of data",[urlData length]);
    NSLog(@"Your %@ ",computedHeartrateLabel.text);

    NSString *outputdata = [[NSString alloc] initWithData:urlData
                                                 encoding:NSASCIIStringEncoding];
    NSLog(@"Outputdata is %@",outputdata);


    NSURLResponse *response;
    NSError *error;
    [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

    if(error==nil)
        NSLog(@"Error is nil");
    else
        NSLog(@"Error is not nil");

输出：

2013-10-22 11:46:58.762 WahooDemo[5820:907] Succeeded! Received 0 bytes of data
2013-10-22 11:46:58.763 WahooDemo[5820:907] Your 69 BPM 
2013-10-22 11:46:58.763 WahooDemo[5820:907] Outputdata is 
2013-10-22 11:46:58.773 WahooDemo[5820:907] Error is not nil
2013-10-22 11:47:00.245 WahooDemo[5820:907] Succeeded! Received 0 bytes of data
2013-10-22 11:47:00.245 WahooDemo[5820:907] Your 68 BPM 
2013-10-22 11:47:00.246 WahooDemo[5820:907] Outputdata is 
2013-10-22 11:47:00.255 WahooDemo[5820:907] Error is not nil
2013-10-22 11:47:01.246 WahooDemo[5820:907] Succeeded! Received 0 bytes of data
2013-10-22 11:47:01.246 WahooDemo[5820:907] Your 67 BPM 
2013-10-22 11:47:01.247 WahooDemo[5820:907] Outputdata is 
2013-10-22 11:47:01.256 WahooDemo[5820:907] Error is not nil

我的 php 文件：

<?php

echo "fsdseeetttttsd<br>";

echo "BHGHGH<br>";

$hb2 =@$_POST['hb'];

echo $hb2;

任何帮助表示赞赏..

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1 回答 1

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    NSURL *url = [NSURL URLWithString:@"http://localhost:8888/123.php"];

可能是导致问题的原因（localhost 指的是电话，而不是您的计算机）。您应该将其更改为适当的 IP 地址。

更一般地说，您实际上应该在第一个查询中传递一个错误和响应指针，以便您可以看到发生了什么：

NSError *error = nil;
NSURLResponse *response = nil;
NSData *urlData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
于 2013-10-22T05:37:47.567 回答