Comments (4)
如果缓存的接口数据在服务器端有更新呢,如果不重新请求,岂不是一直都加载缓存的旧数据了?
PPNetworkHelper的缓存策略是,不管有无网络,都:
1.先加载上次缓存在本地的数据 ->展示
2.然后再请求服务器的数据 ->展示
3.最后再缓存本次的服务器数据 ->等待下次展示
所以当用户即使在没网络的情况下请求服务器数据失败,仍然可以加载上次缓存的数据,不会导致APP的界面一片空白,这样会极大的提升用户体验. 在某些情况下可以缓存一些常用且不会经常变动的数据,避免每次用到都要请求服务器,以减轻服务器的压力.
@songxing10000
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如果缓存的接口数据在服务器端有更新呢,如果不重新请求,岂不是一直都加载缓存的旧数据了?
之前我也是这样想的,可是后台,在请求接口时,没有返回304给我,每次都是200。所以对于 缓存的处理比较头痛,
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那你用PPNetworkHelper就可以满足你的要求了,如果你非得要根据服务器给你返回的状态码来判断是否进行缓存,,那就要自己和后端工程师商量了,让他给你一个准确的状态码.
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不错,明白了,感谢
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