使用NSJSONSerialization解析JSON

太多的讨论已经发生了这一点，但我无法弄清楚如何解决我的问题。使用NSJSONSerialization解析JSON

这里的JSON数据，我从WorldWeatherOnline得到。 JSON是有效的。但我无法弄清楚如何解析它。这是我的代码，接着是JSON。请帮忙！

NSError* errorInfo; 
NSDictionary *parsedJSON = [NSJSONSerialization JSONObjectWithData:self.wwoWeatherData options:kNilOptions error:&errorInfo]; 

NSArray* temp = [parsedJSON objectForKey:@"temp_C"]; 
NSLog(@"%@", temp);

 
    { 
    "data":{ 
     "current_condition":[ 
     { 
      "cloudcover":"0", 
      "humidity":"82", 
      "observation_time":"11:07 PM", 
      "precipMM":"0.0", 
      "pressure":"1024", 
      "temp_C":"16", 
      "temp_F":"61", 
      "visibility":"10", 
      "weatherCode":"113", 
      "weatherDesc":[ 
       { 
        "value":"Clear" 
       } 
      ], 
      "weatherIconUrl":[ 
       { 
        "value":"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0008_clear_sky_night.png" 
       } 
      ], 
      "winddir16Point":"NNE", 
      "winddirDegree":"30", 
      "windspeedKmph":"11", 
      "windspeedMiles":"7" 
     } 
     ], 
     "request":[ 
     { 
      "query":"Lat 48.85 and Lon 2.35", 
      "type":"LatLon" 
     } 
     ], 
     "weather":[ 
     { 
      "date":"2012-09-04", 
      "precipMM":"0.0", 
      "tempMaxC":"25", 
      "tempMaxF":"77", 
      "tempMinC":"14", 
      "tempMinF":"57", 
      "weatherCode":"113", 
      "weatherDesc":[ 
       { 
        "value":"Sunny" 
       } 
      ], 
      "weatherIconUrl":[ 
       { 
        "value":"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0001_sunny.png" 
       } 
      ], 
      "winddir16Point":"N", 
      "winddirDegree":"5", 
      "winddirection":"N", 
      "windspeedKmph":"13", 
      "windspeedMiles":"8" 
     }, 
     { 
      "date":"2012-09-05", 
      "precipMM":"0.0", 
      "tempMaxC":"22", 
      "tempMaxF":"72", 
      "tempMinC":"10", 
      "tempMinF":"50", 
      "weatherCode":"113", 
      "weatherDesc":[ 
       { 
        "value":"Sunny" 
       } 
      ], 
      "weatherIconUrl":[ 
       { 
        "value":"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0001_sunny.png" 
       } 
      ], 
      "winddir16Point":"NNE", 
      "winddirDegree":"25", 
      "winddirection":"NNE", 
      "windspeedKmph":"20", 
      "windspeedMiles":"13" 
     }, 
     { 
      "date":"2012-09-06", 
      "precipMM":"0.0", 
      "tempMaxC":"22", 
      "tempMaxF":"71", 
      "tempMinC":"11", 
      "tempMinF":"51", 
      "weatherCode":"113", 
      "weatherDesc":[ 
       { 
        "value":"Sunny" 
       } 
      ], 
      "weatherIconUrl":[ 
       { 
        "value":"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0001_sunny.png" 
       } 
      ], 
      "winddir16Point":"NE", 
      "winddirDegree":"42", 
      "winddirection":"NE", 
      "windspeedKmph":"15", 
      "windspeedMiles":"10" 
     }, 
     { 
      "date":"2012-09-07", 
      "precipMM":"0.0", 
      "tempMaxC":"24", 
      "tempMaxF":"75", 
      "tempMinC":"13", 
      "tempMinF":"55", 
      "weatherCode":"116", 
      "weatherDesc":[ 
       { 
        "value":"Partly Cloudy" 
       } 
      ], 
      "weatherIconUrl":[ 
       { 
        "value":"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0002_sunny_intervals.png" 
       } 
      ], 
      "winddir16Point":"ENE", 
      "winddirDegree":"56", 
      "winddirection":"ENE", 
      "windspeedKmph":"13", 
      "windspeedMiles":"8" 
     }, 
     { 
      "date":"2012-09-08", 
      "precipMM":"0.0", 
      "tempMaxC":"26", 
      "tempMaxF":"78", 
      "tempMinC":"16", 
      "tempMinF":"61", 
      "weatherCode":"113", 
      "weatherDesc":[ 
       { 
        "value":"Sunny" 
       } 
      ], 
      "weatherIconUrl":[ 
       { 
        "value":"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0001_sunny.png" 
       } 
      ], 
      "winddir16Point":"ENE", 
      "winddirDegree":"76", 
      "winddirection":"ENE", 
      "windspeedKmph":"9", 
      "windspeedMiles":"6" 
     } 
     ] 
    } 
}

来源

2012-09-04 DS.

你的JSON解析您包含一个名为data字典。在该字典中有一组current_condition。继续向下钻取数据结构以找到要查找的属性：

NSDictionary *data = [parsedJSON objectForKey:@"data"]; 
NSArray *currentConditions = [data objectForKey:@"current_condition"]; 
NSDictionary *condition = [currentConditions objectAtIndex:0]; 
NSString *tempC = [condition objectForKey:@"temp_C"];

来源

2012-09-04 00:12:21 highlycaffeinated

应该这样：NSLog（@“％@”，currentConditions）;然后显示current_condition内的值？如果是，那么它不起作用。它显示为空。 –

对不起，有一个复制/粘贴错误。第二行应该从数据拉current_condition，不parsedJson – highlycaffeinated

这是有道理的。但是，如果你看到我的查询，我试图得到temp_c。当我打印currentconditions，它给了我current_condition内的所有值。我需要为currentconditions数组做一个ObjectAtIndex吗？如果是这样，我是否真的需要对索引进行硬编码？我对JSON和iOS编码都很陌生，所以请耐心等待。 –

使用NSJSONSerialization解析JSON

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