講師回答 / liuyubobobo
對(duì)于可選型,里面有可能存儲(chǔ)著nil。如果想將可選型轉(zhuǎn)化為一個(gè)明確的類型,比如通過Int?轉(zhuǎn)化為Int,就需要解包。
2016-05-26
已采納回答 / liuyubobobo
It's a great question! I really want to introduce more about these kinds of topics, as well as more concepts about Function Programming in the future advanced tutorial video. Just look forwarding to it :)Hint: We can use extension, which we will introduce...
2016-05-22
講師回答 / liuyubobobo
現(xiàn)在第三季已經(jīng)完整上線了,快快去學(xué)習(xí)吧!http://t.imooc.com/comment/663?謝謝你的支持!
2016-05-22
口頭禪還有:「 事實(shí)上,swift也為我們…… 」 233333333333333
2016-05-19