unit Unit2;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, System.json;
type
TForm2 = class(TForm)
mmo1: TMemo;
Button1: TButton;
Memo1: TMemo;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form2: TForm2;
implementation
{$R *.dfm}
procedure TForm2.Button1Click(Sender: TObject);
var
JSONObject: TJSONObject;
LItem: TJSONValue;
LJPair: TJSONPair;
weather: TJSONArray;
StrJson: String;
result: String;
i: Integer;
begin
StrJson := mmo1.text;//假定是上面那个json
JSONObject := TJSONObject.ParseJSONValue(TEncoding.UTF8.GetBytes(StrJson), 0)
as TJSONObject;
JSONObject := (JSONObject.GetValue('results') as TJSONArray).Get(0)
as TJSONObject;
weather := JSONObject.GetValue('weather_data') as TJSONArray;
for i := 0 to weather.size - 1 do //应该是4条记录
begin
LItem := (weather.Get(i) as TJSONObject).GetValue('weather'); //得到weather的值
result := result + '|' + LItem.Value;
end;
Memo1.Text:= result;
weather.Free;
JSONObject.Free; // 加上这个， 会出现内存错误， 请专家帮忙解释一下.
end;
end.
只有json 数据带有数组的情况会出错，没有数组的不出错 。 这个是system.json的一个BUG吗？
