[__NSCFArray objectForKey：]：无法识别的选择器已发送到实例

Question

我正在尝试从字典中获取特定键的值，但我得到了一个[[__NSCFArray objectForKey：]：无法识别的选择器发送到实例”

-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
NSDictionary *avatars = [NSJSONSerialization JSONObjectWithData:webData options:0 error:nil];
NSLog(@"response:::%@", avatars);
if(avatars){
    NSDictionary *avatarimage = [avatars objectForKey:@"- image"];
    NSString *name = [avatars objectForKey:@"name"];
}
}

我NSLog我的头像字典，我的结果是：

(
{
    "created_at" = "2013-06-06T11:37:48Z";
    id = 7;
    image =         {
        thumb =             {
            url = "/uploads/avatar/image/7/thumb_304004-1920x1080.jpg";
        };
        url = "/uploads/avatar/image/7/304004-1920x1080.jpg";
    };
    name = Drogba;
    "updated_at" = "2013-06-06T11:37:48Z";
}
)

Answer 1

问题是您NSArray没有NSDictionary。的NSArray计数为1，并包含NSDictionary。

NSArray *wrapper= [NSJSONSerialization JSONObjectWithData:webData options:0 error:nil];
NSDictionary *avatars = [wrapper objectAtIndex:0];

要遍历数组中的所有项目，请枚举数组。

NSArray *avatars= [NSJSONSerialization JSONObjectWithData:webData options:0 error:nil];

for (NSDictionary *avatar in avatars) {
    NSDictionary *avatarimage = avatar[@"image"];
    NSString *name = avatar[@"name"];

    // THE REST OF YOUR CODE
}

注意：我也从-objectForKey:[]语法切换到了。我比较喜欢