objective-c - iOS怎样通过这样的JSON数据，实现上下拉刷新加载更多

Question

{
"count": 87,
"next": "http://127.0.0.1:5000/api/v1.0/posts/?page=2",
"posts": [
{
"author": "http://127.0.0.1:5000/api/v1.0/users/2",
"body": "\u66f4\u597d\u6591\u6591\u9a73\u9a73\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d\u4e0d",
"body_html": null,
"body_title": null,
"comment_count": 0,
"comments": "http://127.0.0.1:5000/api/v1.0/posts/1/comments/",
"id": 1,
"timestamp": "Wed, 24 Jun 2015 06:40:03 GMT",
"url": "http://127.0.0.1:5000/api/v1.0/posts/1"
},
{
"author": "http://127.0.0.1:5000/api/v1.0/users/2",
"body": "\u770b\u770b\u770b\u770b\u5361\u5361\u5361\u5361\u9760\u9760\u9760\u9760\u9760\u9760\u9760",
"body_html": null,
"body_title": null,
"comment_count": 0,
"comments": "http://127.0.0.1:5000/api/v1.0/posts/2/comments/",
"id": 2,
"timestamp": "Wed, 24 Jun 2015 06:40:31 GMT",
"url": "http://127.0.0.1:5000/api/v1.0/posts/2"
},
{
"author": "http://127.0.0.1:5000/api/v1.0/users/2",
"body": "uuuuuuuuuuuuuuuuuuu\u6de1\u6de1\u7684\u6de1\u6de1\u7684\u6de1\u6de1\u7684\u6de1\u6de1\u7684\u6de1\u6de1\u7684\u6de1\u6de1\u7684\u6de1\u6de1\u7684",
"body_html": null,
"body_title": null,
"comment_count": 0,
"comments": "http://127.0.0.1:5000/api/v1.0/posts/3/comments/",
"id": 3,
"timestamp": "Wed, 24 Jun 2015 06:40:44 GMT",
"url": "http://127.0.0.1:5000/api/v1.0/posts/3"
}
],
"prev": null
}

请问怎样通过这样的JSON数据，实现下拉刷新加载更多，是要判断id吗？还是创建时间？或者输出怎样的JSON数据更方便一些？

Answer 1

Data

The

next field is not required. The client can calculate the page number of the next request through the count field. The
count field only needs to be returned when getting the first page of data.

Logic points

• 下拉刷新: Clear all local data and load the first page.
• 上拉加载: Load data using the current page number.
• The common logic of 下拉刷新 and 上拉加载 after successfully loading network data: after successful loading, compare count with the total number of data obtained. If there is still data, then 页码变量 should be increased by one.

Interface

Pull down to refresh and pull up to load. There is a very useful library recommended https://github.com/CoderMJLee/MJRefresh