The iTunes Connect has a guide. Goto the iTunes connect portal and there is a PDF guide you can download listed at the bottom of the page. Follow the step by step instructions listed there.
Genre etc is specified during the submission process in iTunes Connect.
The artwork is also set in the iTunes Connect portal. However if you want to see it on development builds you can add the 512x512 png to the root of your project and name it "iTunesArtwork" (no extension).
Hope that is helpful. Really everything you need is in the developer guide found at iTunes Connect.
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iTunes Connect 有指南。转到 iTunes 连接门户，页面底部列出了一份 PDF 指南，您可以下载。按照此处列出的分步说明进行操作。
流派等是在 iTunes Connect 提交过程中指定的。
艺术品也设置在 iTunes Connect 门户中。但是，如果您想在开发版本中看到它，您可以将 512x512 png 添加到项目的根目录中，并将其命名为“iTunesArtwork”（无扩展名）。
希望这有帮助。事实上，您需要的一切都可以在 iTunes Connect 上找到的开发人员指南中找到。
The iTunes Connect has a guide. Goto the iTunes connect portal and there is a PDF guide you can download listed at the bottom of the page. Follow the step by step instructions listed there.
Genre etc is specified during the submission process in iTunes Connect.
The artwork is also set in the iTunes Connect portal. However if you want to see it on development builds you can add the 512x512 png to the root of your project and name it "iTunesArtwork" (no extension).
Hope that is helpful. Really everything you need is in the developer guide found at iTunes Connect.
1 链接：Apple 指南。
2& 3 请关注BigJason的回答。
1 Link: the Apple guide.
2 & 3 please follow BigJason's answer.