ios - 响应为空

Question

我的回复显示为空。但是当你在浏览器中输入 url 时它显示 1。但在我的代码中它返回 0。 网址是http://boomagift.ramansingla.com/forgotpassword.php?email=nihal@gmail.com 。如果有人能帮助我，我将不胜感激。我是 iOS 新手。

+(NSDictionary *)forgotpassword:(NSString *)email
{
    NSDictionary *dict=[[NSDictionary alloc]init];


    NSString *urlStr=[NSString stringWithFormat:@"http://boomagift.ramansingla.com/forgotpassword.php?email=%@",email];
    NSLog(@"%@",urlStr);

    NSMutableURLRequest *request=[[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:urlStr]];
    dict  =  [self sendRequest:request];
    NSLog(@"%@",dict);

    return dict;
}

+(NSDictionary *)sendRequest:(NSMutableURLRequest *)request
{
    NSHTTPURLResponse *response;
    NSError *error;
    NSData *responseData;
    responseData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
    if(responseData&&[responseData length])
    {

       NSDictionary *dictionary=[NSJSONSerialization JSONObjectWithData:responseData options:0 error:&error];
        return dictionary;
    }
    else
    {
        UIAlertView *noInternetAlert=[[UIAlertView alloc] initWithTitle:@"Boom A GIft" message:@"Server Error" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [noInternetAlert show];
        noInternetAlert=nil;
        return nil;
    }
}

Answer 1

响应数据不是有效的 JSON，因为其顶部项目是数字，而不是集合(列表或对象)。

An object that may be converted to JSON must have the following properties:

• The top level object is an NSArray or NSDictionary.

• All objects are instances of NSString, NSNumber, NSArray, NSDictionary, or NSNull.

• All dictionary keys are instances of NSString.

• Numbers are not NaN or infinity.

您可以使用 options 参数将序列化程序配置为在顶层接受非集合对象。

enum {
  NSJSONReadingMutableContainers = (1UL << 0),
  NSJSONReadingMutableLeaves = (1UL << 1),
  NSJSONReadingAllowFragments = (1UL << 2)
};
typedef NSUInteger NSJSONReadingOptions;

NSJSONReadingAllowFragments

Specifies that the parser should allow top-level objects that are not an instance of NSArray or NSDictionary.

Available in OS X v10.7 and later.

顺便说一句:返回带有错误输出参数的nil(不是NULL)不是开玩笑，而是一个提示，问题出在哪里。 ;-)