Siesta Swift从ImplicitlyUnwrappedOptional铸造 <Swift.AnyObject> 到阵列 <AnyObject>

Question

我正在配置siesta的ResponseTransformer以返回对象数组。

    service.configureTransformer("/models/*") {
        Model.instantiate($0.content)
    }

但不知何故，当我尝试使用let objects = response.content as! [Object]将它们转换回数组时let objects = response.content as! [Object] let objects = response.content as! [Object]我得到了这个异常Could not cast value of type 'Swift.ImplicitlyUnwrappedOptional<Swift.AnyObject>' (0x382a0a0) to 'Swift.Array<Object>' (0x16f5358).

Answer 1

您需要映射您的回复，就像这样

configureTransformer("/models/*") {
    ($0.content).map(Model.instantiate)
}

为了以后再来，你可以尝试这种方式

let objects = resource.typedContent() ?? []