查看此YouTube频道： https://www.youtube.com/channel/UCqiwZNUf9z9OrseJoVGWMMg
它包含8个视频。但是，以下请求仅返回5个视频（即使maxResults设置为10。
openingDate您可以在JSON响应的第一部分中看到NSDate仅为5，而不是预期的8。
projects.sort({
$0.openingDate!.compare($1.openingDate!) == NSComparisonResult.OrderedAscending
})
响应中的items数组只包含5个项目。我尝试了很多查询变体（包括关闭safeSearch），但它不会返回频道中的所有视频。
答案 0 :(得分：1)
以下要求：
https://www.googleapis.com/youtube/v3/search?order=title&part=snippet&channelId=UCqiwZNUf9z9OrseJoVGWMMg&type=video&maxResults=10&key={YOUR_API_KEY}
得出以下结果：
{
"kind": "youtube#searchListResponse",
"etag": "\"Y3xTLFF3RLtHXX85JBgzzgp2Enw/8i-meJV39_yfRucbNqwGwygIReU\"",
"pageInfo": {
"totalResults": 8,
"resultsPerPage": 10
}
尽管我可以告诉它与你发布的内容相同，但我没有指定safesearch参数但尝试了它，但正如你在返回的项目列表中看到的那样 - 它在频道上为我提供了所有视频。我不确定为什么API会对您造成错误，但它应该给出正确的结果。希望我可能会得到一些帮助。
PS：也尝试使用safesearch参数。我得到了你的结果（5个视频），其中包含“严格”和“无”的值，但是它给了我所有8个视频你所寻找的“中等”值我认为是默认值，因为它与我没有相同指定的参数。
"items": [
{
"kind": "youtube#searchResult",
"etag": "\"Y3xTLFF3RLtHXX85JBgzzgp2Enw/DlNXovOlstICaTGq9kp43GR9eBU\"",
"id": {
"kind": "youtube#video",
"videoId": "pcorjQxfwoA"
},
"snippet": {
"publishedAt": "2015-04-08T16:59:38.000Z",
"channelId": "UCqiwZNUf9z9OrseJoVGWMMg",
"title": "EBB Retrofit Animation",
"description": "This animation shows what is involved in completing a seismic retrofit on a house with a raised foundation and a 4 foot cripple wall.",
"thumbnails": {
"default": {
"url": "https://i.ytimg.com/vi/pcorjQxfwoA/default.jpg"
},
"medium": {
"url": "https://i.ytimg.com/vi/pcorjQxfwoA/mqdefault.jpg"
},
"high": {
"url": "https://i.ytimg.com/vi/pcorjQxfwoA/hqdefault.jpg"
}
},
"channelTitle": "",
"liveBroadcastContent": "none"
}
},
{
"kind": "youtube#searchResult",
"etag": "\"Y3xTLFF3RLtHXX85JBgzzgp2Enw/0KLoeBTh2PYOW5CwXmq4Yzxhc-8\"",
"id": {
"kind": "youtube#video",
"videoId": "RV1IzHmSojI"
},
"snippet": {
"publishedAt": "2015-04-08T17:00:17.000Z",
"channelId": "UCqiwZNUf9z9OrseJoVGWMMg",
"title": "EBB Retrofit HD",
"description": "Watch Earthquake Brace + Bolt in action.",
"thumbnails": {
"default": {
"url": "https://i.ytimg.com/vi/RV1IzHmSojI/default.jpg"
},
"medium": {
"url": "https://i.ytimg.com/vi/RV1IzHmSojI/mqdefault.jpg"
},
"high": {
"url": "https://i.ytimg.com/vi/RV1IzHmSojI/hqdefault.jpg"
}
},
"channelTitle": "",
"liveBroadcastContent": "none"
}
},
{
"kind": "youtube#searchResult",
"etag": "\"Y3xTLFF3RLtHXX85JBgzzgp2Enw/x74SevHlVYKeMKmn3O9Toaa33Lg\"",
"id": {
"kind": "youtube#video",
"videoId": "stpSa2rIbS8"
},
"snippet": {
"publishedAt": "2015-04-08T17:33:29.000Z",
"channelId": "UCqiwZNUf9z9OrseJoVGWMMg",
"title": "FEMA Training Part 2",
"description": "This video introduces the effect of earthquakes on houses, discusses past performance of houses in earthquakes, and introduces partial seismic rehabilitation...",
"thumbnails": {
"default": {
"url": "https://i.ytimg.com/vi/stpSa2rIbS8/default.jpg"
},
"medium": {
"url": "https://i.ytimg.com/vi/stpSa2rIbS8/mqdefault.jpg"
},
"high": {
"url": "https://i.ytimg.com/vi/stpSa2rIbS8/hqdefault.jpg"
}
},
"channelTitle": "",
"liveBroadcastContent": "none"
}
},
{
"kind": "youtube#searchResult",
"etag": "\"Y3xTLFF3RLtHXX85JBgzzgp2Enw/7sTYIalNOCQ6jn9X4VBCMphFzbk\"",
"id": {
"kind": "youtube#video",
"videoId": "jYll7dENSOo"
},
"snippet": {
"publishedAt": "2015-04-08T17:23:02.000Z",
"channelId": "UCqiwZNUf9z9OrseJoVGWMMg",
"title": "FEMA Training Part 6",
"description": "This video provides a brief overview of important concepts for identifying the load path in a structure, construction of shear walls, and correctly installin...",
"thumbnails": {
"default": {
"url": "https://i.ytimg.com/vi/jYll7dENSOo/default.jpg"
},
"medium": {
"url": "https://i.ytimg.com/vi/jYll7dENSOo/mqdefault.jpg"
},
"high": {
"url": "https://i.ytimg.com/vi/jYll7dENSOo/hqdefault.jpg"
}
},
"channelTitle": "",
"liveBroadcastContent": "none"
}
},
{
"kind": "youtube#searchResult",
"etag": "\"Y3xTLFF3RLtHXX85JBgzzgp2Enw/GyHVsiWjC3smdvRyhqM7k9TSAL4\"",
"id": {
"kind": "youtube#video",
"videoId": "KHNx0SluNBA"
},
"snippet": {
"publishedAt": "2015-04-08T17:16:18.000Z",
"channelId": "UCqiwZNUf9z9OrseJoVGWMMg",
"title": "FEMA Training Part 4",
"description": "This video clarifies that seismic rehabilitation work falls under the purview of the building code and building department, and gives a brief overview of code ...",
"thumbnails": {
"default": {
"url": "https://i.ytimg.com/vi/KHNx0SluNBA/default.jpg"
},
"medium": {
"url": "https://i.ytimg.com/vi/KHNx0SluNBA/mqdefault.jpg"
},
"high": {
"url": "https://i.ytimg.com/vi/KHNx0SluNBA/hqdefault.jpg"
}
},
"channelTitle": "",
"liveBroadcastContent": "none"
}
},
{
"kind": "youtube#searchResult",
"etag": "\"Y3xTLFF3RLtHXX85JBgzzgp2Enw/qJoVONxqCG32ExIyXSOYwxgT4Q4\"",
"id": {
"kind": "youtube#video",
"videoId": "iaS1wIIrXbA"
},
"snippet": {
"publishedAt": "2015-04-08T17:07:42.000Z",
"channelId": "UCqiwZNUf9z9OrseJoVGWMMg",
"title": "FEMA Training Part 1",
"description": "This video introduces the training course, defines applicable terminology, and shows pictorially why seismic rehabilitation of houses is important.",
"thumbnails": {
"default": {
"url": "https://i.ytimg.com/vi/iaS1wIIrXbA/default.jpg"
},
"medium": {
"url": "https://i.ytimg.com/vi/iaS1wIIrXbA/mqdefault.jpg"
},
"high": {
"url": "https://i.ytimg.com/vi/iaS1wIIrXbA/hqdefault.jpg"
}
},
"channelTitle": "",
"liveBroadcastContent": "none"
}
},
{
"kind": "youtube#searchResult",
"etag": "\"Y3xTLFF3RLtHXX85JBgzzgp2Enw/Ps3HC7X95sTlZ-sR3ZP3lHYhQSM\"",
"id": {
"kind": "youtube#video",
"videoId": "0hQpBJJofcs"
},
"snippet": {
"publishedAt": "2015-04-08T17:31:56.000Z",
"channelId": "UCqiwZNUf9z9OrseJoVGWMMg",
"title": "FEMA Training Part 5",
"description": "This video addresses application of prescriptive provisions for anchorage to foundation and cripple wall bracing contained in the International Existing Building ...",
"thumbnails": {
"default": {
"url": "https://i.ytimg.com/vi/0hQpBJJofcs/default.jpg"
},
"medium": {
"url": "https://i.ytimg.com/vi/0hQpBJJofcs/mqdefault.jpg"
},
"high": {
"url": "https://i.ytimg.com/vi/0hQpBJJofcs/hqdefault.jpg"
}
},
"channelTitle": "",
"liveBroadcastContent": "none"
}
},
{
"kind": "youtube#searchResult",
"etag": "\"Y3xTLFF3RLtHXX85JBgzzgp2Enw/F1VbW4J8TYbRDZuDeotUfWoBi9M\"",
"id": {
"kind": "youtube#video",
"videoId": "OLclXnCQD2k"
},
"snippet": {
"publishedAt": "2015-04-08T17:12:49.000Z",
"channelId": "UCqiwZNUf9z9OrseJoVGWMMg",
"title": "FEMA Training Part 3",
"description": "This video is the heart of the training course, introducing seismic vulnerabilities 'A through K' discussing how to identify vulnerable conditions, likely ea...",
"thumbnails": {
"default": {
"url": "https://i.ytimg.com/vi/OLclXnCQD2k/default.jpg"
},
"medium": {
"url": "https://i.ytimg.com/vi/OLclXnCQD2k/mqdefault.jpg"
},
"high": {
"url": "https://i.ytimg.com/vi/OLclXnCQD2k/hqdefault.jpg"
}
},
"channelTitle": "",
"liveBroadcastContent": "none"
}
}
]
}