在没有创建大量单独的NSArrays / NSDictionaries的情况下，是否有更简单的遍历数组/字典的方法？我知道你可以在keypath上用点表示法和值来遍历嵌套字典，但是当涉及数组时呢？
例如：
目前，如果我想在下面的API结果中找到feed.entry.link [4] .href中的对象，我必须在keypath“feed.entry”定义一个数组，然后分配它的第一个条目作为字典，然后在keypath“link”定义一个数组，并将其第四个条目作为字典访问，然后在“href”访问它的值。
这是正常的吗？
received {
encoding = "UTF-8";
feed = {
entry = (
{
author = (
{
name = {
"$t" = swdestiny;
};
uri = {
"$t" = "https://gdata.youtube.com/feeds/api/users/swdestiny";
};
}
);
category = (
{
scheme = "http://schemas.google.com/g/2005#kind";
term = "http://gdata.youtube.com/schemas/2007#video";
},
{
label = Entertainment;
scheme = "http://gdata.youtube.com/schemas/2007/categories.cat";
term = Entertainment;
},
{
scheme = "http://gdata.youtube.com/schemas/2007/keywords.cat";
term = Star;
},
{
scheme = "http://gdata.youtube.com/schemas/2007/keywords.cat";
term = Wars;
},
{
scheme = "http://gdata.youtube.com/schemas/2007/keywords.cat";
term = Episode;
},
{
scheme = "http://gdata.youtube.com/schemas/2007/keywords.cat";
term = 3;
},
{
scheme = "http://gdata.youtube.com/schemas/2007/keywords.cat";
term = Revenge;
},
{
scheme = "http://gdata.youtube.com/schemas/2007/keywords.cat";
term = of;
},
{
scheme = "http://gdata.youtube.com/schemas/2007/keywords.cat";
term = the;
},
{
scheme = "http://gdata.youtube.com/schemas/2007/keywords.cat";
term = Sith;
}
);
content = {
"$t" = "sw-destiny.net Trailer for Revenge of the Sith";
type = text;
};
"gd$comments" = {
"gd$feedLink" = {
countHint = 1567;
href = "https://gdata.youtube.com/feeds/api/videos/9kdEsZH5ohc/comments";
rel = "http://gdata.youtube.com/schemas/2007#comments";
};
};
"gd$rating" = {
average = "4.7729683";
max = 5;
min = 1;
numRaters = 1132;
rel = "http://schemas.google.com/g/2005#overall";
};
id = {
"$t" = "http://gdata.youtube.com/feeds/api/videos/9kdEsZH5ohc";
};
link = (
{
href = "https://www.youtube.com/watch?v=9kdEsZH5ohc&feature=youtube_gdata";
rel = alternate;
type = "text/html";
},
{
href = "https://gdata.youtube.com/feeds/api/videos/9kdEsZH5ohc/responses";
rel = "http://gdata.youtube.com/schemas/2007#video.responses";
type = "application/atom+xml";
},
{
href = "https://gdata.youtube.com/feeds/api/videos/9kdEsZH5ohc/related";
rel = "http://gdata.youtube.com/schemas/2007#video.related";
type = "application/atom+xml";
},
{
href = "https://m.youtube.com/details?v=9kdEsZH5ohc";
rel = "http://gdata.youtube.com/schemas/2007#mobile";
type = "text/html";
},
{
href = "https://gdata.youtube.com/feeds/api/videos/9kdEsZH5ohc";
rel = self;
type = "application/atom+xml";
}
);
"media$group" = {
"media$category" = (
{
"$t" = Entertainment;
label = Entertainment;
scheme = "http://gdata.youtube.com/schemas/2007/categories.cat";
}
);
"media$content" = (
{
duration = 151;
expression = full;
isDefault = true;
medium = video;
type = "application/x-shockwave-flash";
url = "https://www.youtube.com/v/9kdEsZH5ohc?version=3&f=videos&app=youtube_gdata";
"yt$format" = 5;
},
{
duration = 151;
expression = full;
medium = video;
type = "video/3gpp";
url = "rtsp://v2.cache4.c.youtube.com/CiILENy73wIaGQkXovmRsURH9hMYDSANFEgGUgZ2aWRlb3MM/0/0/0/video.3gp";
"yt$format" = 1;
},
{
duration = 151;
expression = full;
medium = video;
type = "video/3gpp";
url = "rtsp://v2.cache5.c.youtube.com/CiILENy73wIaGQkXovmRsURH9hMYESARFEgGUgZ2aWRlb3MM/0/0/0/video.3gp";
"yt$format" = 6;
}
);
"media$description" = {
"$t" = "sw-destiny.net Trailer for Revenge of the Sith";
type = plain;
};
"media$keywords" = {
"$t" = "Star, Wars, Episode, 3, Revenge, of, the, Sith";
};
"media$player" = (
{
url = "https://www.youtube.com/watch?v=9kdEsZH5ohc&feature=youtube_gdata_player";
}
);
"media$thumbnail" = (
{
height = 360;
time = "00:01:15.500";
url = "http://i.ytimg.com/vi/9kdEsZH5ohc/0.jpg";
width = 480;
},
{
height = 90;
time = "00:00:37.750";
url = "http://i.ytimg.com/vi/9kdEsZH5ohc/1.jpg";
width = 120;
},
{
height = 90;
time = "00:01:15.500";
url = "http://i.ytimg.com/vi/9kdEsZH5ohc/2.jpg";
width = 120;
},
{
height = 90;
time = "00:01:53.250";
url = "http://i.ytimg.com/vi/9kdEsZH5ohc/3.jpg";
width = 120;
}
);
"media$title" = {
"$t" = "Star Wars Episode 3 Revenge of the Sith Trailer";
type = plain;
};
"yt$duration" = {
seconds = 151;
};
};
published = {
"$t" = "2007-05-23T03:31:54.000Z";
};
title = {
"$t" = "Star Wars Episode 3 Revenge of the Sith Trailer";
type = text;
};
updated = {
"$t" = "2012-02-20T17:14:37.000Z";
};
"yt$statistics" = {
favoriteCount = 763;
viewCount = 796719;
};
}
);
xmlns = "http://www.w3.org/2005/Atom";
"xmlns$gd" = "http://schemas.google.com/g/2005";
"xmlns$media" = "http://search.yahoo.com/mrss/";
"xmlns$yt" = "http://gdata.youtube.com/schemas/2007";
};
version = "1.0";
}