Swift中的JSON到数组

正确的语法是

let stringJSON:JSON = ["a1","a2","a3"]

if let firstValue = stringJSON.array?.first {
    print(firstValue) // a1
}

使现代化

因为值实际上包含此字符串 "[\"a1\/a1\",\"a2\/a2\",\"a3\"]" 你不能在服务器端解决这个问题,这是一个解决方法。

if let words = stringJSON.string?.characters.dropFirst().dropLast().split(",").map(String.init) {
    let word = String(words[0].characters.dropFirst().dropLast())
    print(word) // a1
}

if let x = stringJSON[0].string{
print(x)
}

由于服务器不是返回数组,而是返回字符串,因此需要将其转换为字符串数组,如下所示:

let string = stringJSON.string
let array = string.stringByReplacingOccurrencesOfString("[", withString: "")
    .stringByReplacingOccurrencesOfString("]", withString: "")
    .stringByReplacingOccurrencesOfString("\"", withString: "")
    .componentsSeparatedByString(",")

stringJSON如果它是字符串类型,您可以这样解决:

extension String {

var parseJSONString: AnyObject? {
    var any: AnyObject?
    let data = self.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)
    do{
        any = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers)
    }catch let error as NSError{
        print("error: \(error)")
    }
    return any
}

并像这样使用:

let strArr = stringJSON.stringvalue.parseJSONString as! Array<String>