{"action":"opened","issue":{"url":"https://api.github.com/repos/alibaba/Tangram-iOS/issues/76","repository_url":"https://api.github.com/repos/alibaba/Tangram-iOS","labels_url":"https://api.github.com/repos/alibaba/Tangram-iOS/issues/76/labels{/name}","comments_url":"https://api.github.com/repos/alibaba/Tangram-iOS/issues/76/comments","events_url":"https://api.github.com/repos/alibaba/Tangram-iOS/issues/76/events","html_url":"https://github.com/alibaba/Tangram-iOS/issues/76","id":327576082,"number":76,"title":"运行 demo 发现吸顶的偏移量无效。","user":{"login":"mTerminal","id":17818831,"avatar_url":"https://avatars3.githubusercontent.com/u/17818831?v=4","gravatar_id":"","url":"https://api.github.com/users/mTerminal","html_url":"https://github.com/mTerminal","followers_url":"https://api.github.com/users/mTerminal/followers","following_url":"https://api.github.com/users/mTerminal/following{/other_user}","gists_url":"https://api.github.com/users/mTerminal/gists{/gist_id}","starred_url":"https://api.github.com/users/mTerminal/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mTerminal/subscriptions","organizations_url":"https://api.github.com/users/mTerminal/orgs","repos_url":"https://api.github.com/users/mTerminal/repos","events_url":"https://api.github.com/users/mTerminal/events{/privacy}","received_events_url":"https://api.github.com/users/mTerminal/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-05-30T05:10:03Z","updated_at":"2018-05-30T05:10:03Z","closed_at":null,"author_association":"NONE","body":"`extraOffset`设置无效，发现是 TangramView.m 类中 691 行的代码\r\n```\r\nif (topOffset >= ((TangramStickyLayout *)layout).extraOffset) {\r\n     ((TangramStickyLayout *)layout).extraOffset = 0.f;\r\n}\r\n topOffset += (((TangramStickyLayout *)layout).extraOffset + layout.vv_height);\r\n```\r\n这里把 `extraOffset` 置为 0 了，请问是否逻辑错误？"}}
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