Question

我尝试从一个数组中获取一个String，我将重复一个数组。

let parsed = try NSJSONSerialization.JSONObjectWithData(jsonData, options: NSJSONReadingOptions.AllowFragments)

        for item in parsed as! [Dictionary<String, AnyObject>]{
            doSomething(item["title"])
        }

xCode正在打印以下错误，同时获得＆＃34; title＆＃34;来自＆＃34; item＆＃34;：

Cannot subscript a value of Type 'Dictionary<String, AnyObject>' with an index of type 'String'

我的错误是什么？

Answer 1

尝试这样的事情

    if let parsed = try? NSJSONSerialization.JSONObjectWithData(jsonData, options: NSJSONReadingOptions.AllowFragments) as! [String: AnyObject] {

        for (key, value) in parsed {
            print(key)
            print(value)
            // do something

        }
    }

我刚试过这个简单的代码 - 这适用于swift 2.0

let jsonData = "{\"hello\":\"world\"}".dataUsingEncoding(NSUTF8StringEncoding)

if let parsed = try? NSJSONSerialization.JSONObjectWithData(jsonData!, options: NSJSONReadingOptions.AllowFragments) as! [String: AnyObject] {

    for (key, value) in parsed {
        print(key)
        print(value)
        // do something
    }
}

Answer 2

也许这可能会对你有所帮助。尝试一下，让我知道它是否有效。

if let parsed = (try NSJSONSerialization.JSONObjectWithData(jsonData, options:  NSJSONReadingOptions(rawValue: 0)) as? [[String : AnyObject]]) {
for items in parsed {
    if let item = items as? [String : AnyObject] {
        let title = item["title"]
        print("@@@ item :: \(title)")
    }
}}

如何从Swift中的Array中的Array获取String

2 个答案: