Xcode 9.1 Swift 4,如果使用“if #available”,則無法使用 NSDocumentTypeDocumentAttribute 進行編譯 [英]Xcode 9.1 Swift 4, unable to compile with NSDocumentTypeDocumentAttribute if “if #available” is used
FirebaseDatabaseUI 有 Swift 編譯器錯誤 Xcode 8 Swift 3 [英]FirebaseDatabaseUI has swift compiler error Xcode 8 Swift 3