Question

我的json数据中有以下参数。

date = "2018-02-12";
"grand_total" = "82.88";
message = "Order Details Details";
status = "order_details";
"sub_total" = 74;
"tax_total" = "8.880000000000001";
time = "06:53:46";

如何设置标签的总计和小计。在目标c中，我们可以使用带有格式的nsstring字符串直接访问字符串的任何值，但在swift中没有这样的选项。

Answer 1

您需要首先将json解析为对象，然后访问您要使用的数据：

if let object = json as? [String:Any] {
    if let total = object["grand_total"] as? Double, let subTotal = object["sub_total"] as? Double {
        // You can now use total and subTotal in here now to set to your labels
        totalLabel.text = "\(total)"
        subTotalLabel.text = "\(subTotal)"
    }
}

Answer 2

Swift 3

使用if let将是最安全的方式。

if let gTotal = dict["grand_total"] as? Double {
     // gTotal had the double value
}
else if let gTotal = dict["grand_total"] as? Int {
     // gTotal had the int value
}
else {
     // not double nor int value.
}

if let subTotal = dict["sub_total"] as? Double {
    // subTotal had the double value
}
else if let subTotal = dict["sub_total"] as? Int {
    // subTotal had the int value
}
else {
     // not double nor int value.
}

if let message  = dict["message"] as? String {
    // message had the string value
}
else {
    // not string value
}

希望它有所帮助。

如何在Swift中访问Json Int，Double，String中的数据？

2 个答案: