从NSDictionnary检索值 [英] Retrieve value from NSDictionnary

问题描述

我有一个NSDictionary，但我不知道如何检索"@mode"和"@route"的值(这是来自json响应).

I have a NSDictionary and I don't know how I can retrieve the value of "@mode" and "@route" (this is from a json response).

我该怎么做?

谢谢！

这是NSDictionary:

This is the NSDictionary :

{
"@mode" = WALK;
"@route" = "Rue University";
distance = "17.513516908661757";
duration = 13000;
endTime = "2011-04-29T12:08:59.395-04:00";
from =     {
    geometry = "{\"type\": \"Point\", \"coordinates\": [-73.57120386807037,45.503820214186405]}";
    lat = "45.503820214186405";
    lon = "-73.57120386807037";
    name = "Rue University";
};
legGeometry =     {
    length = 3;
    points = "{mvtG`k``MOd@ME";
};
startTime = "2011-04-29T12:08:46.395-04:00";
steps =     {
    walkSteps =         (
                    {
            absoluteDirection = NORTHWEST;
            becomes = false;
            distance = "17.513516908661757";
            elevation = "";
            lat = "45.503820214186405";
            lon = "-73.57120386807037";
            stayOn = false;
            streetName = "Rue University";
        },
                    {
            absoluteDirection = NORTH;
            becomes = true;
            distance = "0.0";
            elevation = "";
            lat = "45.50390573910769";
            lon = "-73.57139257694809";
            relativeDirection = RIGHT;
            stayOn = false;
            streetName = "street transit link";
        }
    );
};
to =     {
    geometry = "{\"type\": \"Point\", \"coordinates\": [-73.571363,45.503971]}";
    lat = "45.503971";
    lon = "-73.571363";
    name = "Station McGill";
    stopId = 32;
};

推荐答案

类似于索引0的对象是NSDictionary.

Looks like object at index 0 is a NSDictionary.

NSDictionary *dict = [array objectAtIndex:0];
NSString *route = [dict objectForKey:@"@route"];

这篇关于从NSDictionnary检索值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！