swift 获取某个类的所有属性

获取某个类的所有属性，这里举例UIAlertAction

extension UIAlertAction {
    /// 取属性列表
    static var propertyNames: [String] {
        var outCount: UInt32 = 0
        guard let ivars = class_copyIvarList(self, &outCount) else {
            return []
        }
        var result = [String]()
        let count = Int(outCount)
        for i in 0..

调用下面方法打印出属性列表

dump(UIAlertAction.propertyNames)