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我需要实现逻辑,当我打开附件到邮件时,它将与我的应用程序相关联。我已阅读有关它的信息:
注册您的应用支持的文件类型
但是当我打开我在邮件中附加的 .png 文件时,我看不到我的应用程序的图标。我该如何解决?