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This article mainly introduces how to clear the key value in XamarinEssentials, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

The Clear () method of the Preferences class clears all keys and values. There are two forms of this method, which are introduced in turn below.

(1) the syntax of the Clear () method is as follows:

Public static void Clear ()

(2) the syntax of the Clear (string) method is as follows:

Public static void Clear (string sharedName)

Where the sharedName parameter specifies the name of the shared container.

There are two points to be aware of when using Preferences:

(1) in the above, some methods have the parameter sharedName, which can be used to create preferences for other containers. The reading varies depending on the platform.

Android: all data is stored in Shared Preferences. If no sharedName is specified, the default Shared Preferences is used, otherwise the name will be used to get the private Shared Preferences with the specified name.

IOS: use NSUserDefaults to store values on iOS devices. If sharedName is not specified, StandardUserDefaults is used, otherwise the name will be used to create a NSUserDefaults with the specified name based on NSUserDefaultsType.SuiteName.

UWP:ApplicationDataContainer is used to store values on UWP devices. If sharedName is not specified, LocalSettings is used, otherwise the name will be used to create a new container in LocalSettings.

(2) Preferences is only suitable for storing a small amount of text. If you try to store a large amount of text, it will affect the overall performance of the application.

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