推荐回答(3个)
iOS系统是无法设置不自动关闭后台程序的,严格意义来说,苹果其实没有后台,所以不能保持后台运行不退出。
只能设置关闭后台应用自动程序刷新,以iPhone 6手机为例,具体方法如下:
一、打开手机,在桌面上找到“设置”一项,点击进入。
![](/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2Feaf81a4c510fd9f9fb8c75e5282dd42a2934a4a6%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto)
二、进入设置后,找到“通用”一项,点击进入。
![](/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2Fe824b899a9014c0892d00829077b02087af4f457%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto)
三、进入通用后,找到“后台应用刷新”一项,点击进入。
![](/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2F8694a4c27d1ed21bbed00d69a06eddc451da3f24%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto)
四、进入后台应用刷新后,找到需要关闭的应用,将其后面的开关关闭即可。
![](/picurl?url=https%3A%2F%2Fiknow-pic.cdn.bcebos.com%2Fe850352ac65c10386d25ed4ebf119313b17e89e6%3Fx-bce-process%3Dimage%252Fresize%252Cm_lfit%252Cw_600%252Ch_800%252Climit_1%252Fquality%252Cq_85%252Fformat%252Cf_auto)
建议所有iOS 装置的使用者都可以阅读该篇文章,实际了解一下iOS 中所谓的「后台进程」到底是怎么回事!
Let me be as
clear as I can be: the iOS multitasking bar does not contain "a list of all
running apps". It contains "a list of recently used apps". The user never has to
manage background tasks on iOS.
首先我们得搞清楚的是,iOS
中所谓的「后台驻留」并不是指「执行中的程序」,而是「最近使用过的程序」,也可以瞧瞧Apple 的知识库文章怎么写的:
按两下主画面按钮,显示最近用过的应用程序。
按两下主画面按钮后,显示的是「最近用过的应用程序」,所以别把它想成Mac OS X
中的Command + Tab 键所显示的切换程序列;你可以试试看将iPhone 关机再开机,然后按两下Home
键,应该会发现先前那些程式还是出现在那里,因为它其实是你最近使用过的程序使用记录,或像是浏览器中的浏览记录)。
如果你一个一个去清除 "后台驻留"
的程序,就像是一笔一笔删除浏览记录中的项目一样,是没有太大意义的(除非你不想让其他人看到你曾经用过什么程式,或者想杀时间、太无聊了),也不会对电力或记忆体有什么帮助。
iOS 的多工处理其实是很聪明的,系统会自动中止在背景执行的程序,在有需要时,也会将被中止的程式(suspended) 从内存中移除。因此,iOS
装置的使用者根本就不需要担心怎么「管理」这些执行中或不在执行中的程序,尽管放心用、轻松玩就是了!
一般说来,所有程式进入背景后都还有5
秒的执行缓冲时间,有些程序可以要求延长到10 分钟(这些当然是由开发人员在设计与提交程式时决定和声明);
因此,在你按下Home
键后,本来的程式就会退到背景,如果它有额外的背景执行作业,超过10 分钟还是会被iOS 中止;所以,还是别担心了!
但是,Fraser
也提到了例外情况,某些特殊类型的程式是被容许在背景中持续执行的,像是会持续在背景播放音乐的程序、GPS 程序、VOIP 程序、Newsstand
以及周边配件附属的程序,不过只要这些程序不再执行动作,就会变成中止的程式,像是音乐拨完了、杂志下载完了... 因此,使用者其实也没必要太过留意这些程序。
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