blocks|key|4337231|text|iOS提供了多任务应用程序接口，即使你的应用程序在后台，它的一些应用程序接口也是可以访问的。这些服务包括：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4337232|4337233|本地Notifications|ordered-list-item|4337234|Background+Audio|4337235|Background+Tasks|4337236|Background+Location|4337237|4337238|因此，当应用程序不在前台时，你绝对可以使用CoreLocation发送位置更新。|offset|length|style|CODE|4337239|这个链接-+iOS+multitasking包含当应用程序在后台时启动你的服务的代码。循序渐进的说明|4337240|4337241|指定位置背景模式|unordered-list-item|4337242|在后台使用NSTimer+by+using+UIApplication:beginBackgroundTaskWithExpirationHandler:|4337243|In+NSTimer+is+smaller+xUIApplication:backgroundTimeRemaining它工作得很好，在x较大的情况下，应该在没有剩余时间之前再次启用(和禁用)位置管理器，以避免后台任务被杀死。这是可行的，因为位置是三种允许的后台执行类型之一。|4337244|4337245|来源-+How+do+I+get+a+background+location+update+every+n+minutes+in+my+iOS+application?|4337246|entityMap|0|LINK|mutability|MUTABLE|url|http://mobile.tutsplus.com/tutorials/iphone/ios-multitasking-background-tasks/|1|https://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application^0|0|0|0|0|0|0|0|L|C|0|6|G|0|0|0|0|5|7|M|1J|0|3|7|M|12|1W|1|0|0|4|28|1|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|1H|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|1I|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|1J|8|@]|9|@]|A|$]]|$1|J|3|K|5|E|7|1K|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1M|8|@$O|1N|P|1O|Q|R]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1P|8|@]|9|@$O|1Q|P|1R|1|1S]]|A|$]]|$1|U|3|-4|5|6|7|1T|8|@]|9|@]|A|$]]|$1|V|3|W|5|X|7|1U|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|X|7|1V|8|@$O|1W|P|1X|Q|R]|$O|1Y|P|1Z|Q|R]]|9|@]|A|$]]|$1|10|3|11|5|X|7|20|8|@$O|21|P|22|Q|R]|$O|23|P|24|Q|R]|$O|25|P|26|Q|R]]|9|@]|A|$]]|$1|12|3|-4|5|6|7|27|8|@]|9|@]|A|$]]|$1|13|3|14|5|6|7|28|8|@]|9|@$O|29|P|2A|1|2B]]|A|$]]|$1|15|3|-4|5|6|7|2C|8|@]|9|@]|A|$]]]|16|$17|$5|18|19|1A|A|$1B|1C]]|1D|$5|18|19|1A|A|$1B|1E]]]]

iOS provides multitasking API's i.e. even if your app is in background, some of its API's can be accessed. These services are - 

<ol>
<li>Local Notifications</li>
<li>Background Audio</li>
<li>Background Tasks</li>
<li>Background Location</li>
</ol>

So you can definitely send location updates using <code>CoreLocation</code> when the app is not in foreground.

This link - <a href="http://mobile.tutsplus.com/tutorials/iphone/ios-multitasking-background-tasks/" rel="nofollow noreferrer">iOS multitasking</a> has code to start your service when app in background. Step by step instructions

<ul>
<li>Specify location background mode</li>
<li>Use an <code>NSTimer</code> in the background by using <code>UIApplication:beginBackgroundTaskWithExpirationHandler:</code></li>
<li>In case <code>x</code> time is smaller than <code>UIApplication:backgroundTimeRemaining</code> it does works just fine, in case <code>x</code> is larger, the location manager should be enabled (and disabled) again before there is no time remaining to avoid the background task being killed. This does work since location is one of the three allowed types of background execution.</li>
</ul>

SOURCE - <a href="https://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application">How do I get a background location update every n minutes in my iOS application?</a>

blocks|key|4337290|text|在这里，来自苹果文档(http://developer.apple.com/library/ios/#documentation/iphone/conceptual/iphoneosprogrammingguide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html#//apple_ref/doc/uid/TP40007072-CH4-SW47)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4337291|4337292|有几种方法可以在后台跟踪用户的位置，其中大多数实际上不需要你的应用程序在后台连续运行：|blockquote|4337293|4337294|-The重大变更定位服务(推荐)|4337295|-仅限前台的位置服务|4337296|-Background定位服务|4337297|4337298|但您不能发送请求，因为唯一可能做的事情是：-audio+-location+-voip+-newsstand+-Accessories+&蓝牙连接|4337299|所以我猜你可以存储你所有的位置，并在应用程序再次转到前台时用NSURLConnection发送|4337300|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/library/ios/#documentation/iphone/conceptual/iphoneosprogrammingguide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html#//apple_ref/doc/uid/TP40007072-CH4-SW47^0|B|5J|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|D|3|-4|5|6|7|15|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|16|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|17|8|@]|9|@]|C|$]]|$1|I|3|J|5|6|7|18|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|19|8|@]|9|@]|C|$]]|$1|M|3|N|5|6|7|1A|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|1B|8|@]|9|@]|C|$]]|$1|P|3|Q|5|6|7|1C|8|@]|9|@]|C|$]]|$1|R|3|S|5|6|7|1D|8|@]|9|@]|C|$]]|$1|T|3|-4|5|6|7|1E|8|@]|9|@]|C|$]]]|U|$V|$5|W|X|Y|C|$Z|10]]]]

Here, from the apple documentation (<a href="http://developer.apple.com/library/ios/#documentation/iphone/conceptual/iphoneosprogrammingguide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html#//apple_ref/doc/uid/TP40007072-CH4-SW47" rel="nofollow noreferrer">http://developer.apple.com/library/ios/#documentation/iphone/conceptual/iphoneosprogrammingguide/ManagingYourApplicationsFlow/ManagingYourApplicationsFlow.html#//apple_ref/doc/uid/TP40007072-CH4-SW47</a>)
<blockquote>
There are several ways to track the user’s location in the background, most of which do not actually require your app to run continuously in the background:
-The significant-change location service (Recommended)
-Foreground-only location services
-Background location services
</blockquote>
But you cannot send request, as the only possible things to do are :
-audio
-location
-voip
-newsstand
-Accessories &amp; blutooth connection
So I guess you could store all your location, and send it with NSURLConnection once the app goes to foreground again

I'd like to know if is possible to send asynchronous connections when an app is in background. The reason for this is because I need to send the user's location (get from Core Location) to update a database in a remote server everytime the location changes, even if the app is not in foreground.

Do I have to set any permission for this? Does Apple rejects apps processing connections when app is in background?

Thanks in advance!!

NSURLConnection when app is in background

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想知道当应用程序在后台时是否可以发送异步连接。这样做的原因是因为我需要发送用户的位置(从核心位置获取)，以便在每次位置更改时更新远程服务器中的数据库，即使应用程序不在前台。我需要为此设置任何权限吗？当应用程序在后台时，苹果会拒绝应用程序处理连接吗？提前感谢！！

问应用程序在后台时的NSURLConnection
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