Swift 如何为可选字符串赋值创建内联快捷方式
swfit中是否有与javascript中的以下内容等效的内容Swift 如何为可选字符串赋值创建内联快捷方式,swift,Swift,swfit中是否有与javascript中的以下内容等效的内容 optionalString = maybeThisExists || "" myFunc(maybeThisExists || "") 我应该这样做吗 myFunc(maybeThisExists ? maybeThisExists! : "") 使用??操作符: let optionalString = maybeThisExists ?? "" optionalString将包含maybeThisExists的内容,如果
optionalString = maybeThisExists || ""
myFunc(maybeThisExists || "")
我应该这样做吗
myFunc(maybeThisExists ? maybeThisExists! : "")
使用
??操作符:
let optionalString = maybeThisExists ?? ""
optionalString
将包含maybeThisExists
的内容,如果maybeThisExists
不是空的,否则它将获得“.”在swift??
(无合并)中执行相同的操作…查看本指南。。。