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对于 iOS8 应用，AppStore 必须上传预览。对于 Yosemite，我使用 newset iMovie(10.0.6) 来进行应用程序预览。我只是想在视频上添加一些标题或文字，但我发现有些失望。没有办法设置标题背景颜色透明，那是不可能的。！ ![]
![![]](https://i.stack.imgur.com/joUnc.jpg){kind=link}
