AnyObject って参照型なら OK じゃなくてクラスじゃないとダメなのか。 1> let a: () -> Int = { 42 } 2. let b: AnyObject = a error: repl.swift:2:20: error: value of type '() -> Int' does not conform to specified type 'AnyObject' let b: AnyObject = a ^ as AnyObjectAnyObject って参照型なら OK じゃなくてクラスじゃないとダメなのか。 1> let a: () -> Int = { 42 } 2. let b: AnyObject = a error: repl.swift:2:20: error: value of type '() -> Int' does not conform to specified type 'AnyObject' let b: AnyObject = a ^ as AnyObjecttypealias AnyObject