Swift 2解析JSON-无法下标'AnyObject'类型的值 [英] Swift 2 Parsing JSON - Cannot subscript a value of type 'AnyObject'

问题描述

我尝试了以下示例来解析JSON文件(例如，此处发布的另一个问题的答案: https://stackoverflow .com/a/27206145/4040201 )，但无法正常运行.我现在在"let ... = item ["..."] as?String"行上收到错误无法下标'AnyObject'类型的值"的错误.

I've tried following examples for parsing a JSON file (for example an answer to another question posted here: https://stackoverflow.com/a/27206145/4040201) but can't get it to work. I'm now getting the error "Cannot subscript a value of type 'AnyObject'" on the "let ... = item["..."] as? String" lines.

func connectionDidFinishLoading(connection: NSURLConnection) {

    do {
        let jsonResult = try NSJSONSerialization.JSONObjectWithData(self.bytes!, options: NSJSONReadingOptions.MutableContainers) as! Dictionary<String, AnyObject>

        if let searchResults = jsonResult["Search"] as? [AnyObject] {
            for item in searchResults {
                let title = item["Title"] as? String //Error Here
                let type = item["Type"] as? String //Error Here
                let year = item["Year"] as? String //Error Here

                print("Title: \(title) Type: \(type) Year: \(year)")
            }
        }

    } catch let error as NSError {
        NSLog("JSON Error: \(error)")
    }
}

JSON示例:

{ "Search": [
    {
    "Title":"Example 1",
    "Year":"2001",
    "Type":"Type1"
    },
    {
    "Title":"Example 2",
    "Year":"2006",
    "Type":"Type1"
    },
    {
    "Title":"Example 3",
    "Year":"1955",
    "Type":"Type1"
    }
]}

推荐答案

尝试一下

func connectionDidFinishLoading(connection: NSURLConnection) {

    do {
        let jsonResult = try NSJSONSerialization.JSONObjectWithData(self.bytes!, options: NSJSONReadingOptions.MutableContainers) as! Dictionary<String, AnyObject>

        if let searchResults = jsonResult["Search"] as? [[String: AnyObject]] {
            for item in searchResults {
                let title = item["Title"]
                let type = item["Type"]
                let year = item["Year"]

                print("Title: \(title) Type: \(type) Year: \(year)")
            }
        }

    } catch let error as NSError {
        NSLog("JSON Error: \(error)")
    }
}

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