Question

一直致力于从API中提取数据，最终让它工作（我相信正确）但是当我在字典中打印出变量时，“Optional”会被添加到字符串中

        do {
            let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options:NSJSONReadingOptions.MutableContainers) as? NSDictionary
            print(jsonResult)
            if (jsonResult != nil) {
                if let players = jsonResult?["players"] as? [Dictionary<String, AnyObject>] {
                    for player in players {
                        let personID = player["name"]
                        print(personID)
                    }
                }
            } else {
                print("No Data")
                // couldn't load JSON, look at error
            }
        }

JSON输出的示例:(注意我将其剪切并仅使用第一个元素）

Optional({
players =     (
            {
        name = "Derek Anderson";
    },

打印声明：

Optional(Derek Anderson)

我的假设是它打印可选词典，然后抓住“玩家”的名字。意思是我没有把这个名字拉出来。我已将名称从玩家阵列中拉出，而不是可选。

我觉得我可能会以某种方式添加可选数组，但似乎无法解决这个问题！

Answer 1

解决了，变量需要解包：

        do {
        let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options:NSJSONReadingOptions.MutableContainers) as? NSDictionary
        print(jsonResult)
        if (jsonResult != nil) {
            if let players = jsonResult?["players"] as? [Dictionary<String, AnyObject>] {
                for player in players {
                    let personID = player["name"]!
                    print(personID)
                }
            }
        } else {
            print("No Data")
            // couldn't load JSON, look at error
        }
    }

添加到输出的可选字符串 - Swift

1 个答案: