arrays - SWIFT 3 线程 1：EXC_BAD_INSTRUCTION（代码=EXC_1386_INVOP，子代码=0*0）

Question

let roupa1: [String: String] = ["ID": "H1", "Descricao": "Roupa bacana!", "Preco": "40$"]
var roupasArray = [Dictionary<String, String>()]
roupasArray.append(roupa1)

UserDefaults.standard.set(roupasArray, forKey: "Roupas")

if let objecto = UserDefaults.standard.object(forKey: "Roupas") as? Array<Dictionary<String, String>>{
    lbtest.text = (objecto[0]["ID"])
}

有人能帮我吗？我是 swift 3.0 的新手，到处找，但找不到解决方案