Question

我正在编写一个扫描条形码的应用程序，然后查询Outpan.com以获取条形码编号的信息。如何从网址请求中提取信息？下面是扫描成功后的输出示例。我怎么能将名称存储到NSString中？

这是我用来访问信息的代码。

- (void) sendRequest {


NSString *myString = @"https://api.outpan.com/v2/products/";

NSString *secondhalf= _barcode;


NSString *thirdHalf = @"?apikey=935b8b8e102f93220b751a4e1c66126a";

NSString *test = [myString stringByAppendingString:secondhalf];
NSString *text = [test stringByAppendingString:thirdHalf];

if (![text isEqualToString:@""]) {

    NSURL *url = [NSURL URLWithString:text];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [self.webView loadRequest:request];

}

}

通常我会尝试使用类似

的内容

   NSString* value = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementById('myId').value"];

如果html看起来像这样

<html>
  <body>
      <input id="myId" type="text" value="TextValue"/>
  </body>
</html>

但是html就像这样

<html><head></head><body><pre style="word-wrap: break-word; white-space: pre-    wrap;">{
    "gtin": "0014633156720",
    "outpan_url": "https:\/\/www.outpan.com\/view_product.php?    barcode=0014633156720",
    "name": "Battlefield: Bad Company 2",
    "attributes": {
        "Distribution Media\/Method": "Blu-ray Disc",
        "ESRB Rating": "RP (Rating Pending)",
        "Manufacturer": "Electronic Arts",
        "Manufacturer Part Number": "15672",
        "Platform": "PlayStation 3",
        "Platform Supported": "PlayStation 3",
        "Software Main Type": "Game",
        "Software Sub Type": "First Person Shooter"
    },
    "images": [],
    "videos": [],
    "categories": []
}</pre></body></html>

WebView

Answer 1

问题是您正在尝试使用UIWebView发出api请求。 api可能会将您的Accepts标头视为text / html，因此会在网页中向您发送api响应，而不仅仅是原始JSON。请尝试使用NSURLSession发出请求。

responseBody

未经测试，因为我没有真正的条形码，但您应该在cbind词典中看到您要求的JSON。

如何从iOS中的url请求中提取数据

1 个答案: