總是報錯誤呢
為什么按他寫的,總是報String interpolation produces a debug description for an optional value; did you mean to make this explicit? ? Use 'String(describing:)' to silence this warning
為什么按他寫的,總是報String interpolation produces a debug description for an optional value; did you mean to make this explicit? ? Use 'String(describing:)' to silence this warning
2018-04-25
舉報
2018-05-28
? 這個是字符串拼接的時候最后沒有判斷吧,因為可能最后一個字符串是可選字符串? ?可以參考??https://www.jianshu.com/p/cf65a376dc7b