objective-c - Xcode 10.2 Swift 错误 : Function types cannot be represented in Objective-C unless their parameters and returns can be

Question

我今天将 Xcode 更新到 10.2，但出现以下错误:

Method cannot be marked @objc because the type of the parameter 2 cannot be represented in Objective-C

Function types cannot be represented in Objective-C unless their parameters and returns can be I don't understand why

在 10.1 中完全没问题。这是我多年来一直使用的示例，没有任何问题。我怎样才能使这段代码无错误地编译？

@objc public func myFunction(inputString: String, handler:@escaping ((success: Bool, outPut: NSArray)) -> Void) {
    // do stuff
}

Answer 1

删除短语outPut:。它总是非法的； Swift 5 终于收紧了。

所以:

@objc public func myFunction(inputString: String, handler:@escaping (NSArray) -> Void) {