Question

此响应来自JSON格式的服务器 posts =

(
            {
        commentCount = 0;
        "country_id" = 225;
        "country_name" = "United States";
        dislikeCount = 2;
        disliked = 0;
        firstname = Test;
        imageHeight = 0;
        imagePath = "";
        imageWidth = 0;
        lastname = Test;
        likeCount = 2;
        liked = 0;
        postid = 126;
        posttime = "2014-11-10 12:26:43";
        shareCount = 0;
        statusUpdate = Hello;
        "upload_type" = text;
        userId = 13;
        userimage = "https://Test.com/1409976093.png";
        videoHeight = "";
        videoPath = "";
        videoThumbnail = "";
        videoWidth = "";
    },
            {
        commentCount = 0;
        "country_id" = 225;
        "country_name" = "United States";
        dislikeCount = 2;
        disliked = 0;
        firstname = Test;
        imageHeight = 0;
        imagePath = "";
        imageWidth = 0;
        lastname = Test;
        likeCount = 3;
        liked = 0;
        postid = 125;
        posttime = "2014-10-28 17:50:00";
        shareCount = 0;
        statusUpdate = "Happy%20chhata%20puja%20to%20you%20and%20your%20family%0Athanks%0ADr%20shah%20family";
        "upload_type" = text;
        userId = 78;
        userimage = "https://Test.com/1410142960.png";
        videoHeight = "";
        videoPath = "";
        videoThumbnail = "";
        videoWidth = "";
    }

现在我需要更新＆＃34;喜欢＆＃34;的价值从0到1本地，但我无法做到这一点。我把这个数组存储在我的数组中：

self.homePageDataArray.addObjectsFromArray(dictionary["posts"] as NSMutableArray)

我能够从每个索引中获取内容，并且能够在TableView中显示这个内容，但我想改变＆＃34;喜欢＆＃34;的状态。从0到1，用户将点击＆＃34; Like Button＆＃34;在我的应用程序中显然我会在服务器上更新这个，但我想在本地更新并行。请让我知道如何实现。我尝试了很多，但每次都显示一些错误！对于实例，

var tempDic:Dictionary<AnyObject,AnyObject> = self.homePageDataArray[selectedRow] as Dictionary

我收到此错误

Type 'AnyObject' does not conform to protocol 'Hashable'

最终，我希望能够使用＆＃34; updateValue＆＃34;方法，以便我可以在我的数组中更新我的字典的值。

Answer 1

这应该适合你：

var tempDic = self.homePageDataArray[selectedRow] as Dictionary<String, AnyObject>

您的版本：

var tempDic:Dictionary<AnyObject,AnyObject> = self.homePageDataArray[selectedRow] as Dictionary

无效，因为AnyObject不符合Hashable，Dictionary中对通用密钥类型的要求。

并回答你的other question：

var tempDic = self.homePageDataArray[selectedRow] as NSMutableDictionary as Dictionary

上面的陈述编译，因为Dictionary可以与它的Objective-C对应物联系起来; NSMutableDictionary。您生成的字典将为Dictionary<String, AnyObject>类型。您可能想知道类型String是如何被推断出来的。好吧，NSMutableDictionary使用NSString作为键，这种类型可以与它的Swift对应物联系起来，你猜对了; String。

Answer 2

我真的不知道为什么，，但以下解决方案为我工作

var tempDic = self.homePageDataArray[selectedRow] as NSMutableDictionary as Dictionary

如果有人能解释那么它也会帮助别人！

如何更新位于Array的每个索引的Swift中的字典

2 个答案: