我该怎么做
protocol FieldIndexProtocol: RawRepresentable where RawValue == Int {
}
或类似的
protocol PopoverFormContentViewProtocol: class {
associatedtype Field: FieldIndexProtocol where RawValue == Int
}
或类似的
typealias ContentView = UIView & PopoverFormContentViewProtocol where RawValue == Int
离开类型GENERIC