Swift 解析 json 无效

Question

我想解析一个 json 文件，这个在我的 json 文件中：

{
    "currentPowerByClient": 0,  <- i want to read this
    "currentPowerToClient":518,
    "tariff":1,
    "totalGasDelivered":1061.004,
    "totalPowerByClientHigh":10.704,
    "totalPowerByClientLow":23.042,
    "totalPowerToClientHigh":912.221,
    "totalPowerToClientLow": 693.499
}

这是我的 swift 代码，名为 JSONResult 的对象包含我的 JSON 代码

var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(data, options:
NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary

if let item = jsonResult as NSDictionary? {
    if let currentPowerByClient = item["currentPowerByClient"] as? NSDictionary {
        println(currentPowerByClient)
    }
}

当我运行它时，它没有打印任何东西

Answer 1

行

if let currentPowerByClient = item["currentPowerByClient"] as? NSDictionary

应该是

if let currentPowerByClient = item["currentPowerByClient"] as? NSNumber

因为item["currentPowerByClient"]应该是一个数字，而不是字典。然后就可以了

Swift 解析 json 无效

Swift parsing json doesn't work

json

ios

swift