如何通过代码更改应用偏好设置？
我已在设备设置应用中列出了我的应用。现在，我可以通过设备应用设置应用更改我的应用设置。
现在我想做的是相反的。
如果我在应用程序中更改了我的应用程序的首选项，我将尝试创建一个应用程序，以便它可以在设备设置应用程序中更改其首选项。
I have listed my app in the device setting app.Now I can change my app settings through the device app settings app. Now what I am trying to do is the reverse. I am trying to make a app so that it can itself change its preferences in the device settings app if I change the preferences of my app from within the app.
任何想法朋友，
谢谢所有。
Any ideas Friends, Thank You All.
很简单：
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"MyPreferenceKey"];
NSUserDefaults 包括设置ints，浮动，字符串等。您还可以只使用-setValue：forKey：。
NSUserDefaults includes convenience methods for setting ints, floats, strings, and so on. You can also just use -setValue:forKey:.
当您使用 NSUserDefaults 更改应用程序中的值时，设置在设置应用程序中也会更改。
When you change a value in your app using NSUserDefaults, the setting well change in the Settings app, too.