The **Preferences** module provides APIs for processing data in the form of key-value (KV) pairs and supports persistence of the KV pairs when required.
The **user preferences** module provides APIs for processing data in the form of key-value (KV) pairs and supports persistence of the KV pairs when required.
The key is of the string type, and the value can be a number, a string, a Boolean value, or an array of numbers, strings, or Boolean values.
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@@ -176,12 +176,12 @@ The deleted **Preferences** instance cannot be used for data operations. Otherwi
| context | Context | Yes | Application context.<br>For details about the application context of the FA model, see [Context](js-apis-inner-app-context.md).<br>For details about the application context of the stage model, see [Context](js-apis-inner-application-uiAbilityContext.md). |
| name | string | Yes | Name of the **Preferences** instance to delete. |
| name | string | Yes | Name of the **Preferences** instance to delete. |
| callback | AsyncCallback<void> | Yes | Callback invoked to return the result. If the operation is successful, **err** is **undefined**. Otherwise, **err** is an error code.|
**Error codes**
For details about the following error codes, see [Preference Error Codes](../errorcodes/errorcode-preferences.md).
For details about the error codes, see [User Preference Error Codes](../errorcodes/errorcode-preferences.md).
| ID| Error Message |
| -------- | ------------------------------|
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@@ -213,6 +213,7 @@ Stage model:
```ts
importUIAbilityfrom'@ohos.app.ability.UIAbility';
classEntryAbilityextendsUIAbility{
onWindowStageCreate(windowStage){
try{
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@@ -257,7 +258,7 @@ The deleted **Preferences** instance cannot be used for data operations. Otherwi
**Error codes**
For details about the following error codes, see [Preference Error Codes](../errorcodes/errorcode-preferences.md).
For details about the error codes, see [User Preference Error Codes](../errorcodes/errorcode-preferences.md).
| ID| Error Message |
| -------- | ------------------------------|
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@@ -288,6 +289,7 @@ Stage model:
```ts
importUIAbilityfrom'@ohos.app.ability.UIAbility';
classEntryAbilityextendsUIAbility{
onWindowStageCreate(windowStage){
try{
...
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@@ -348,6 +350,7 @@ Stage model:
```ts
importUIAbilityfrom'@ohos.app.ability.UIAbility';
classEntryAbilityextendsUIAbility{
onWindowStageCreate(windowStage){
try{
...
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@@ -500,7 +503,7 @@ try {
promise.then((data)=>{
console.info("Got the value of 'startup'. Data: "+data);
}).catch((err)=>{
console.info("Failed to get value of 'startup'. code ="+err.code+", message ="+err.message);
console.info("Failed to obtain the value of 'startup'. code ="+err.code+", message ="+err.message);
})
}catch(err){
console.info("Failed to obtain the value of 'startup'. code ="+err.code+", message ="+err.message);
