ios - NSURLConnection 在某些参数中返回 Null

Question

这是 my URL .我需要从这个 URL 获取数据..它将返回英文单词的值..但是如果我给出像“Para Qué Volviste”这样的参数..然后它返回 null..请帮助我..

我的代码是

 NSURLConnection * connectionGetISRC=[[NSURLConnection alloc]initWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://ws.spotify.com/search/1/track.json?q=Para Qué Volviste"]] delegate:self];
    [connectionGetISRC start];


-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    dataJson=[NSMutableData data];
}

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    NSLog(@"dat %@",data);
    [dataJson appendData:data];
}

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    NSLog(@"error %@",error.description);
    [hud hide:YES];
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    id dict=[NSJSONSerialization JSONObjectWithData:dataJson options:kNilOptions error:nil];
    NSLog(@"dataJson %@",dataJson);
    NSLog(@"dicvt %@",dict);
}

Answer 1

您的 URL 中的空格看起来有问题。试试这个连接字符串

 NSString *str=[NSString stringWithFormat:@"http://ws.spotify.com/search/1/track.json?q=Para Qué Volviste"];
str=[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURLConnection * connectionGetISRC=[[NSURLConnection alloc]initWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:str]] delegate:self];
[connectionGetISRC start];