Swift 2.0 + Alamofire 3.0 - JSON 加载缓慢

Question

我有一个展示健康食谱的项目。该项目将 JSON 对象从 Alamofire 返回到 Arraylist，然后返回到 Table 视图中的 Table Cell。当我将所有对象加载到 tableview 时，它加载......很慢。 8 秒以上。但我的目标是 3 秒。我知道问题出在 alamofire 附近，因为我检查了 print(timestamp)。我做错了什么吗？

func getCookData(urlString: String , completionHandler: (String, String, String, String, String, String, String, String, String, String, String, String, String, String, String) -> ()) -> (){



    Alamofire.request(.GET, urlString).responseJSON() {
        response in
       // var cookArray:[CookData] = []

            if response.result.isSuccess {
            let data = response.result.value

            let cookJson = JSON(data!)

            for (var i = 0; i < cookJson["data"].count; i++){

            let category = cookJson["data"][i]["kategorie"].stringValue
            let nameOfRecipe = cookJson["data"][i]["nazev"].stringValue
            let preparationTime = cookJson["data"][i]["priprava"].stringValue
            let cookingTime = cookJson["data"][i]["vareni"].stringValue
            let dificulty = cookJson["data"][i]["obtiznost"].stringValue
            let count = cookJson["data"][i]["pocet"].stringValue

            var ingredience = String()

            for var j = 0; j < cookJson["data"][i]["ingredience"].count; j++ {

                let ingredienceX = cookJson["data"][i]["ingredience"][j].stringValue

             ingredience = ingredience + "\n" +  "- " + ingredienceX

            }

            let nutriInfo = cookJson["data"][i]["nutricni_informace"].stringValue
            let kcal = cookJson["data"][i]["nutricni_informace"]["Kcal"].stringValue
            let bilkoviny = cookJson["data"][i]["nutricni_informace"]["Bílkoviny"].stringValue
            let sacharidy = cookJson["data"][i]["nutricni_informace"]["Sacharidy"].stringValue
            let tukyy = cookJson["data"][i]["nutricni_informace"]["Tuky"].stringValue
            let preparationMekanism = cookJson["data"][i]["postup_pripravy"].stringValue
            let photo = cookJson["data"][i]["photos"][0].stringValue
            let thumb = cookJson["data"][i]["thumb"].stringValue

            self.printTimestamp()

            completionHandler(category, nameOfRecipe, preparationTime, cookingTime, dificulty, count, ingredience, nutriInfo, preparationMekanism, photo, thumb, kcal, bilkoviny, sacharidy, tukyy)
            }

    }
}
}

Answer 1

所以...答案很简单，我想加载的数据太多了，我做了（甚至是未使用的数据）。解决这个问题的理想方法是只获取您需要的内容，然后变得非常具体。

示例：**我有一本食谱书。我想得到所有的食谱并观看它们。解决方案：因此只获取所有食谱的 ID 和名称并将它们存储在数组中，然后如果您需要显示特定的食谱，请编写一个 Alamofire 方法来获取特定的配方数据并使用该配方参数的 ID 调用它。

Swift 2.0 + Alamofire 3.0 - JSON 加载缓慢

Swift 2.0 + Alamofire 3.0 - slow loading of JSONs

ios

alamofire

swifty-json

ios9

swift2