Inbox 按钮仍然提供了未读计数（在桌面显示中被放入括号中）。

The Inbox button still features an unread count (in parenthesis for the desktop display).

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count 方法返回当前计数，initialize 方法询问 Back 按钮支持（有些时候也许不想要 Back 按钮支持）并初始化计数值。

The count method returns the current count, and the initialize method asks for Back button support (sometimes you might not want Back button support) and initializes the value of count.

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单击Explain按钮，可以看到每个计数器的详细说明。

Click on the Explain button for a detailed explanation of each counter.

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