Question

我试图在objective-c中获取facebook个人资料图片的网址。我这样做了。

-(NSString *)getProfileURL:(NSString *)userId{
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    request = [[NSMutableURLRequest alloc] init];

    NSString *requestURL = [NSString stringWithFormat:@"https://graph.facebook.com/%@/picture",userId];
    NSLog(@"request url is %@",requestURL);
    [request setURL:[NSURL URLWithString:requestURL]];
    [request setHTTPMethod:@"GET"];
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    [request setTimeoutInterval:60.0];

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

    NSString *data=[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
    NSLog(@"data received from url: %@", data);

    return data;
}

当我在浏览器中从requestURL复制并通过日志时，我得到了正确的图像。但是当我查看日志"Data received from url: "时。我总是得到(null)。

任何帮助？

Answer 1

相应于Graph API documentation，您正在调用的URL直接返回图像，这就是为什么您可以将返回的值加载到NSString，您可以改为创建UIImage实例，像这样：

NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; 
UIImage *image = [[UIImage alloc]initWithData:urlData];

使用简单的NSMutableURLRequest获取Facebook个人资料图片

1 个答案: