swift获取url参数

public extension URL {
    
    var urlParameters: [String: String]? {
    
        guard let components = URLComponents(url: self, resolvingAgainstBaseURL: true),
        let queryItems = components.queryItems else {
     return nil }
        return queryItems.reduce(into: [String: String]()) {
     (result, item) in
            result[item.name] = item.value
        }
    }
}