Question

我正在尝试从NSDictionary解析数据，但是遇到了麻烦。每当我尝试访问此信息时，它都会显示nil。

NSDictionary：

{
"-LTR7P8PFWHogjlBENiJ" =     {
    filmid = 335983;
    rating = "5.5";
    review = Ehh;
};
}

代码：

let dict = info.value as! NSDictionary
print(dict) //prints about NSDict
print(dict["review"] as? String) //prints nil

从NSDictionary打印“ Ehh”的正确方法是什么？

Answer 1

您具有搜索结果的外部字典包装，带有字符串键-LTR7P8PFWHogjlBENiJ

因此，您的代码当前正在外部字典中搜索键review。

Answer 2

您可以如下获得Unable to import module 'src/engine/handler': Error at Function.Module._resolveFilename (module.js:469:15) at Function.Module._load (module.js:417:25) at Module.require (module.js:497:17) at require (internal/module.js:20:19) at Object.<anonymous>(/var/task/src/engine/controllers/image.js:43:12) at Module._compile (module.js:570:32) at Object.Module._extensions..js (module.js:579:10) at Module.load (module.js:487:32) at tryModuleLoad (module.js:446:12) at Function.Module._load (module.js:438:3)值，

review

对于typealias JSON = [String: Any] let dictionary: JSON = [ "-LTR7P8PFWHogjlBENiJ": [ "filmid": 335983, "rating": "5.5", "review": "Ehh" ] ] if let reivew = (dictionary.first?.value as? JSON)?["review"] as? String { print(reivew) }，您可能需要如下使用

NSDictionary

在NSDictionary中访问信息

2 个答案: