我跑了_“＆gt; https://graph.facebook.com/act_47121778/adcreatives? access_token = _ 并得到以下结果。为什么有些广告素材会返回空图像哈希？
{
"view_tag": "",
"alt_view_tags": [
],
"creative_id": "6002716206572",
"type": 1,
"title": "Grow your fans!",
"body": "Fan Page Owners! Grow your fanbase. Create quizzes for your page. Win $100 Weekly. Make money with our revenue share program.",
"image_hash": "6ac30e43f21c8580361de92d3288ed68",
"link_url": "http://www.facebook.com/quizwriter?sk=app_81434956828",
"name": "Grow your fans!",
"run_status": 1,
"preview_url": "http://www.facebook.com/ads/api/creative_preview.php?cid=6002716206572",
"count_current_adgroups": 1,
"id": "6002716206572",
"image_url": "http://creative.ak.fbcdn.net/v41818/flyers/109/44/1296329249810543669_1_31eb15ed.jpg"
},
{
"view_tag": "",
"alt_view_tags": [
],
"creative_id": "6002444043572",
"type": 1,
"title": "Tennis Champs Social Game",
"body": "Tennis Champ! Start with 5,000 dollars , beat out other players with your mad tennis skills and become the tennis champ! Socialize!",
"image_hash": "",
"link_url": "334886511760",
"name": "Tennis Champs Social Game",
"run_status": 1,
"preview_url": "http://www.facebook.com/ads/api/creative_preview.php?cid=6002444043572",
"count_current_adgroups": 2,
"id": "6002444043572"
},