我将NSArray声明为
obj.src = "green3.jpg";
这是存储在数组中的Json数据,
var GetVehicleData :NSArray!
现在我想根据来自谷歌矩阵API的距离数据交换这些元素。作为一个例子,如果我想将这个数组的第二个索引元素与第一个索引元素交换,我该怎么办?
我试过用,
{
"vehicle": "1",
"plate_no": "1111111111",
"vehicle_id": 1,
"pro_pic": "1490258953381.jpg",
"fname": "Test",
"lname": "User 01",
"phone": "+9476112282334",
"passenger_no": 4,
"model": "honda",
"colour": "red",
"driver_id": "3",
"lat": "6.8964",
"lng": "79.8885"
},
{
"vehicle": "2",
"plate_no": "CAQ-1234",
"vehicle_id": 2,
"pro_pic": "1490258754529.jpg",
"fname": "Test",
"lname": "User 2",
"phone": "+9477789424897",
"passenger_no": 4,
"model": "Honda",
"colour": "Black",
"driver_id": "4",
"lat": "6.8876886",
"lng": "79.8628148"
},
{
"vehicle": "3",
"plate_no": "FGH-1234",
"vehicle_id": 3,
"pro_pic": "1490258812119.jpg",
"fname": "Test ",
"lname": "User 3",
"phone": "+9476533142335",
"passenger_no": 1,
"model": "TVS",
"colour": "red",
"driver_id": "6",
"lat": "6.8876901",
"lng": "79.8628141"
}
但它给了我这个错误,
swap(&GetVehicleData[1], & GetVehicleData[2])
答案 0 :(得分:2)
(编辑:以下是我对问题的原始答案,它在技术上仍然准确,但请注意,除非您特别需要NSArray / NSMutableArray,否则vadian建议使用Swift数组会更好。)
您无法编辑NSArray,而是使用NSMutableArray:
var GetVehicleData :NSMutableArray!
答案 1 :(得分:2)
使用Swift数组,因为var
你可以免费获得可变性:
var GetVehicleData : [[String:Any]]!