升级至SDK 4.2.4后Garmin MonkeyC Communications.makeWebRequest失效求助

错误详情 #

编译时触发类型不匹配错误：

ERROR: fenix6: C:\....\OtherView.mc:90,8: Invalid '$.Toybox.Lang.Method(responseCode as $.Toybox.Lang.Number, data as Null or $.Toybox.Lang.Dictionary) as Void' passed as parameter 4 of type 'PolyType<(callback(responseCode as $.Toybox.Lang.Number, data as Null or $.Toybox.Lang.Dictionary or $.Toybox.Lang.String) as Void) or (callback(responseCode as $.Toybox.Lang.Number, data as Null or $.Toybox.Lang.Dictionary or $.Toybox.Lang.String, context as $.Toybox.Lang.Object) as Void)>'.

问题原因 #

新版Garmin SDK更新了Communications.makeWebRequest的回调签名要求：

• 回调的data参数类型从原有的Null or Dictionary扩展为Null or Dictionary or String（当JSON解析失败时，服务器返回的非JSON内容会以字符串形式传入）
• 同时支持两种回调形式：带context参数或不带，但参数类型必须严格匹配

你的旧代码中onReceive方法的data参数仅定义为Dictionary?（即Null or Dictionary），不符合新版SDK的类型规范，因此触发编译错误。

解决方案 #

修改onReceive方法的参数签名，将data的类型扩展为Null or Dictionary or String，无需额外参数的话可以忽略context，但类型必须匹配要求。

修改后的代码示例 #

class HttpRequest {
    protected var onAfterReceive;
    public function initialize(onAfterReceiveArg) {
        onAfterReceive = onAfterReceiveArg;
    }
    
    // 调整data参数类型，兼容新版SDK要求
    function onReceive(responseCode as Number, data as Null or Dictionary or String) as Void {
        if (responseCode == 200) {
            Ui.popView(Ui.SLIDE_IMMEDIATE);
            System.println("Request Successful");
            // 因设置了JSON响应类型，正常情况data为Dictionary，增加类型判断处理异常
            if (data is Dictionary) {
                Extensions.setPropertyAndStorage("test", data["test"]);
                Extensions.setPropertyAndStorage("test1", data["test1"] + "/" + data["test2"]);
                self.onAfterReceive.invoke();
            } else {
                // 处理JSON解析失败场景
                System.println("Invalid JSON response: " + data);
                self.onAfterReceive.invoke("Request failed: Invalid response format");
            }
        } else {
            Ui.popView(Ui.SLIDE_IMMEDIATE);
            System.println("Response: " + responseCode);
            self.onAfterReceive.invoke("Can't connect:" + responseCode + "\n" + Extensions.getPropertyOrStorage("test1"));
        }        
    }

    function makeRequest() as Void {
        Ui.pushView( new LoadingView(), null, Ui.SLIDE_IMMEDIATE);
        var url = "https://removed";
        var app = Application.getApp();
        
        var params = {
            //"definedParams" => "123456789abcdefg"
        };
        var options = {
            :method => Communications.HTTP_REQUEST_METHOD_GET,
            :headers => {
                "Authorization" => app.getProperty("apikey"),
                "Content-Type" => Communications.REQUEST_CONTENT_TYPE_URL_ENCODED
            },
            :responseType => Communications.HTTP_RESPONSE_CONTENT_TYPE_JSON
        };

        var responseCallback = method(:onReceive);
        Communications.makeWebRequest(url, params, options, responseCallback);
    }
}

额外说明 #

如果需要传递额外数据，可以使用带context参数的回调形式：

function onReceive(responseCode as Number, data as Null or Dictionary or String, context as Object) as Void {
    // 你的业务逻辑
}

调用时补充传入context参数：

Communications.makeWebRequest(url, params, options, responseCallback, yourContextObject);

内容的提问来源于stack exchange，提问作者jarekj9