ios - 确定网络可用性
<p><p>Parse 是否有一种方法可以用来确定 Internet 访问是否可用？我意识到可以使用 Apple 的 Reachability，但想知道 Parse 是否有一个可以轻松返回状态的方法。</p>
<p>我想在尝试更新 iPhone 上的数据之前检查互联网访问。</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>来自 <a href="https://www.parse.com/questions/ios-test-connectivity-to-parse-and-timeout-question" rel="noreferrer noopener nofollow">parse.com/questions</a> </p>
<blockquote>
<p>The standard way of checking for connectivity in any iOS app is to use
the Reachability APIs.</p>
<p>One has to be careful when specifying aggressive timeouts in queries.
Ultimately, its the user who better knows the current network
conditions and if waiting a little longer might be enough for the
query to complete (as might be the case in a tunnel), in which case
having a short timeout would make it very frustrating for the user.</p>
<p>For that reason, I suggest setting a NSTimer prior to executing the
query, and invalidating it when the query returns. If the NSTimer
fires before being invalidated, ask the user if they want to keep
waiting for the results to come back, or show them a message
indicating that the request is taking a long time to complete. This
gives the user the chance to wait more if they know their current
network conditions are not ideal.</p>
<p>You may find an example of this pattern in the Anypic sample app.</p>
</blockquote>
<p>Anypic 示例应用程序中提到的示例:
<a href="https://github.com/ParsePlatform/Anypic/blob/master/Anypic-iOS/Anypic/PAPPhotoDetailsViewController.m" rel="noreferrer noopener nofollow">AnyPic Sample App Repository</a> </p>
<p>正如您在问题中已经说过的那样，可达性是要走的路。</p></p>
<p style="font-size: 20px;">关于ios - 确定网络可用性，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/28610487/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/28610487/
</a>
</p>
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