blocks|key|1901471|text|UIBackgroundModes键标识应用程序支持的后台任务。它的值是一个数组，其中包含一个或多个具有下列值的字符串：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1901472|互联网音频-应用程序在background.|1901473|location中向用户播放音频内容-即使在background.|unordered-list-item|1901474|
|1901475|voip中运行，该应用程序也会随时通知用户其位置-该应用程序为用户提供使用连接进行电话呼叫的能力。|1901476|1901477|您可以在Xcode上编辑Info.plist文件。要添加新密钥，请单击%2B号并写入：|1901478|iOS+4|offset|length|style|BOLD|1901479|"UIBackgroundModes“作为关键字，确保类型设置为字符串，然后根据需要在值中写入音频、位置或voip：|1901480|📷|atomic|1901481|​|1901482|iOS+6|1901483|“所需的背景模式”作为键，然后在下拉菜单中设置类型。|1901484|1901485|1901486|1901487|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/a9bffa1001b865ad5eb488a46a1766a9.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/26edc474fe456bb12e955a99bce000f9.png^0|0|0|0|0|0|0|0|0|5|0|0|0|1|0|0|0|0|5|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|1I|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1J|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|1K|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|1L|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|1M|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1O|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1P|8|@$P|1Q|Q|1R|R|S]]|9|@]|A|$]]|$1|T|3|U|5|6|7|1S|8|@]|9|@]|A|$]]|$1|V|3|W|5|X|7|1T|8|@]|9|@$P|1U|Q|1V|1|1W]]|A|$]]|$1|Y|3|Z|5|6|7|1X|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|1Y|8|@$P|1Z|Q|20|R|S]]|9|@]|A|$]]|$1|12|3|13|5|6|7|21|8|@]|9|@]|A|$]]|$1|14|3|Z|5|6|7|22|8|@]|9|@]|A|$]]|$1|15|3|W|5|X|7|23|8|@]|9|@$P|24|Q|25|1|26]]|A|$]]|$1|16|3|Z|5|6|7|27|8|@]|9|@]|A|$]]|$1|17|3|-4|5|6|7|28|8|@]|9|@]|A|$]]]|18|$19|$5|1A|1B|1C|A|$1D|1E|1F|-4]]|1G|$5|1A|1B|1C|A|$1D|1H|1F|-4]]]]

The UIBackgroundModes key identifies which background tasks your application supports. Its value is an array that contains one or more strings with the following values:

<ul>
<li>audio – The application plays audible content to the user while in the background.</li>
<li>location – The application keeps users informed of their location, even while running in the background.</li>
<li>voip – The application provides the ability for the user to make phone calls using an Internet connection.</li>
</ul>

You can edit the Info.plist file on Xcode. To add a new key, click on the + sign and write:

iOS 4

"UIBackgroundModes" as the key, make sure the type is set to string and then in value write audio, location or voip depending on your needs:
<img src="https://i.imgur.com/pMA2u.png" alt="Info.plist">

iOS 6

"Required background modes" as the key and then set the type in drop down menu.

<img src="https://i.stack.imgur.com/SHhfy.png" alt="enter image description here">

blocks|key|4915624|text|在IOS+13中。它将类似于下面给出的列表。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4915625|​|4915626|📷|atomic|offset|length|4915627|4915628|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/4e4203b7495849803dc1f59f8a1a04da.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

In IOS 13. It would be like the list given below.

<a href="https://i.stack.imgur.com/anA3M.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/anA3M.png" alt="enter image description here"></a>

blocks|key|339103|text|以下是文档的链接：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339104|https://developer.apple.com/documentation/bundleresources/information_property_list/uibackgroundmodes|offset|length|339105|名称："Required+background+modes“类型:字符串数组|style|CODE|339106|有效值：|339107|339108|audio|unordered-list-item|339109|location|339110|voip|339111|external-accessory|339112|bluetooth-central|339113|bluetooth-peripheral|339114|fetch|339115|remote-notification|339116|processing|339117|339118|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|2T|0|0|4|P|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1E|8|@]|9|@$D|1F|E|1G|1|1H]]|A|$]]|$1|F|3|G|5|6|7|1I|8|@$D|1J|E|1K|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|1L|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]|$1|M|3|N|5|O|7|1N|8|@]|9|@]|A|$]]|$1|P|3|Q|5|O|7|1O|8|@]|9|@]|A|$]]|$1|R|3|S|5|O|7|1P|8|@]|9|@]|A|$]]|$1|T|3|U|5|O|7|1Q|8|@]|9|@]|A|$]]|$1|V|3|W|5|O|7|1R|8|@]|9|@]|A|$]]|$1|X|3|Y|5|O|7|1S|8|@]|9|@]|A|$]]|$1|Z|3|10|5|O|7|1T|8|@]|9|@]|A|$]]|$1|11|3|12|5|O|7|1U|8|@]|9|@]|A|$]]|$1|13|3|14|5|O|7|1V|8|@]|9|@]|A|$]]|$1|15|3|-4|5|6|7|1W|8|@]|9|@]|A|$]]|$1|16|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]]|17|$18|$5|19|1A|1B|A|$1C|C]]]]

Here's the link to the documentation:
<a href="https://developer.apple.com/documentation/bundleresources/information_property_list/uibackgroundmodes" rel="nofollow noreferrer">https://developer.apple.com/documentation/bundleresources/information_property_list/uibackgroundmodes</a>
Name: &quot;<code>Required background modes</code>&quot;
Type: Array of strings
Valid values:
<ul>
<li>audio</li>
<li>location</li>
<li>voip</li>
<li>external-accessory</li>
<li>bluetooth-central</li>
<li>bluetooth-peripheral</li>
<li>fetch</li>
<li>remote-notification</li>
<li>processing</li>
</ul>

I'm new to iPhone development.I have already gone through some of the exploring pages to create UIBackgroundModes key in Info.plist for iOS4 .But it is little bit difficult to understand . Kindly provide some step by step procedure with screenshot example for easy understanding...also specify what the requirements which are needed ie iPhone, OS version 4.0...

give some screenshots to create UIBackgroundModes key in Info.plist for iOS4

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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我是iPhone开发的新手，我已经浏览了一些在Info.plist中为iOS4 .But创建UIBackgroundModes密钥的探索页面，这有点难以理解。请提供一些简单的understanding...also简单的屏幕截图示例一步一步的程序说明哪些要求是需要的，即iPhone，操作系统版本4.0...

问提供一些在Info.plist中为iOS4创建UIBackgroundModes密钥的屏幕截图
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问提供一些在Info.plist中为iOS4创建UIBackgroundModes密钥的屏幕截图EN