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提交 24337828 编写于 作者: W wangxiyue
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IssueNo:#I6FWG1 

Description: preferences&object示例代码规范化
Sig:SIG_PRINT
Feature or Bugfix: Feature
Binary Source: No
Signed-off-by: Nwangxiyue <wangxiyue8@huawei.com>
上级 95c7ffe2
隐藏空白更改
内联 并排
Showing with 113 addition and 462 deletion
zh-cn/application-dev/database/database-distributedobject-guidelines.md
浏览文件 @ 24337828
......@@ -142,7 +142,7 @@
function grantPermission() {
let permissions = ['ohos.permission.DISTRIBUTED_DATASYNC'];
context.requestPermissionsFromUser(permissions).then((data) => {
console.log('success: ${data}');
console.info('success: ${data}');
}).catch((error) => {
console.error('failed: ${error}');
});
......
zh-cn/application-dev/database/database-preference-guidelines.md
浏览文件 @ 24337828
......@@ -113,22 +113,20 @@
```ts
// 获取context
import UIAbility from '@ohos.app.ability.UIAbility'
let context = null;
import UIAbility from '@ohos.app.ability.UIAbility';
let preferences = null;
export default class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context;
onWindowStageCreate(windowStage) {
let promise = data_preferences.getPreferences(this.context, 'mystore');
promise.then((pref) => {
preferences = pref;
}).catch((err) => {
console.info("Failed to get preferences.");
})
}
}
let promise = data_preferences.getPreferences(context, 'mystore');
promise.then((pref) => {
preferences = pref;
}).catch((err) => {
console.info("Failed to get preferences.");
})
```
3. 存入数据。
......
zh-cn/application-dev/reference/apis/js-apis-data-distributedobject.md
浏览文件 @ 24337828
......@@ -15,7 +15,7 @@ import distributedObject from '@ohos.data.distributedDataObject';
## distributedObject.create<sup>9+</sup>
create(context: Context, source: object): DistributedObjectV9
create(context: Context, source: object): DataObject
创建一个分布式数据对象。
......@@ -32,7 +32,7 @@ create(context: Context, source: object): DistributedObjectV9
| 类型 | 说明 |
| -------- | -------- |
| [DistributedObjectV9](#distributedobjectv9) | 创建完成的分布式数据对象。 |
| [DataObject](#dataobject) | 创建完成的分布式数据对象。 |
**示例：**
......@@ -44,7 +44,7 @@ import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
// 创建对象，该对象包含4个属性类型，string,number,boolean和Object
// 创建对象，该对象包含4个属性类型：string、number、boolean和Object
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
```
......@@ -54,15 +54,15 @@ Stage模型示例：
// 导入模块
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
let g_object = null;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
// 创建对象，该对象包含4个属性类型：string、number、boolean和Object
g_object = distributedObject.create(this.context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
}
}
// 创建对象，该对象包含4个属性类型，string,number,boolean和Object
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
```
## distributedObject.genSessionId
......@@ -108,9 +108,9 @@ revokeSave接口回调信息。
| -------- | -------- | -------- | -------- |
| sessionId | string | 是 | 多设备协同的唯一标识。 |
## DistributedObjectV9
## DataObject
表示一个分布式数据对象。
表示一个分布式数据对象。在使用以下接口前，需调用[create()](#distributedobjectcreate9)获取DataObject对象。
### setSessionId<sup>9+</sup>
......@@ -139,35 +139,10 @@ setSessionId(sessionId: string, callback: AsyncCallback&lt;void&gt;): void
**示例：**
FA模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
// g_object加入分布式组网
g_object.setSessionId(distributedObject.genSessionId(), ()=>{
console.log("join session");
});
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
}
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
// g_object加入分布式组网
g_object.setSessionId(distributedObject.genSessionId(), ()=>{
console.log("join session");
console.info("join session");
});
```
......@@ -197,43 +172,14 @@ setSessionId(callback: AsyncCallback&lt;void&gt;): void
**示例：**
FA模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
// g_object加入分布式组网
g_object.setSessionId(distributedObject.genSessionId(), ()=>{
console.log("join session");
console.info("join session");
});
// 退出分布式组网
g_object.setSessionId(() => {
console.log("leave all lession.");
});
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
}
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
// g_object加入分布式组网
g_object.setSessionId(distributedObject.genSessionId(), ()=>{
console.log("join session");
});
// 退出分布式组网
g_object.setSessionId(() => {
console.log("leave all lession.");
console.info("leave all lession.");
});
```
......@@ -269,40 +215,7 @@ setSessionId(sessionId?: string): Promise&lt;void&gt;
**示例：**
FA模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
// g_object加入分布式组网
g_object.setSessionId(distributedObject.genSessionId()).then (()=>{
console.log("join session.");
}).catch((error)=>{
console.info("error:" + error.code + error.message);
});
// 退出分布式组网
g_object.setSessionId().then (()=>{
console.log("leave all lession.");
}).catch((error)=>{
console.info("error:" + error.code + error.message);
});
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
}
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
// g_object加入分布式组网
g_object.setSessionId(distributedObject.genSessionId()).then (()=>{
console.info("join session.");
......@@ -311,7 +224,7 @@ g_object.setSessionId(distributedObject.genSessionId()).then (()=>{
});
// 退出分布式组网
g_object.setSessionId().then (()=>{
console.log("leave all lession.");
console.info("leave all lession.");
}).catch((error)=>{
console.info("error:" + error.code + error.message);
});
......@@ -334,38 +247,7 @@ on(type: 'change', callback: Callback<{ sessionId: string, fields: Array&lt;stri
**示例：**
FA模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
globalThis.changeCallback = (sessionId, changeData) => {
console.info("change" + sessionId);
if (changeData != null && changeData != undefined) {
changeData.forEach(element => {
console.info("changed !" + element + " " + g_object[element]);
});
}
}
g_object.on("change", globalThis.changeCallback);
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
}
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
globalThis.changeCallback = (sessionId, changeData) => {
console.info("change" + sessionId);
if (changeData != null && changeData != undefined) {
......@@ -395,33 +277,7 @@ off(type: 'change', callback?: Callback<{ sessionId: string, fields: Array&lt;st
**示例：**
FA模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
// 删除数据变更回调changeCallback
g_object.off("change", globalThis.changeCallback);
// 删除所有的数据变更回调
g_object.off("change");
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
}
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
// 删除数据变更回调changeCallback
g_object.off("change", globalThis.changeCallback);
// 删除所有的数据变更回调
......@@ -445,36 +301,10 @@ on(type: 'status', callback: Callback<{ sessionId: string, networkId: string, st
**示例：**
FA模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
globalThis.statusCallback = (sessionId, networkId, status) => {
globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
g_object.on("status", globalThis.statusCallback);
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
}
}
globalThis.statusCallback = (sessionId, networkId, status) => {
globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
g_object.on("status", globalThis.statusCallback);
```
......@@ -496,36 +326,7 @@ off(type: 'status', callback?: Callback<{ sessionId: string, deviceId: string, s
**示例：**
FA模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
globalThis.statusCallback = (sessionId, networkId, status) => {
globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
}
// 删除上下线回调changeCallback
g_object.off("status",globalThis.statusCallback);
// 删除所有的上下线回调
g_object.off("status");
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
}
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false, parent:{mother:"jack mom",father:"jack Dad"}});
globalThis.statusCallback = (sessionId, networkId, status) => {
globalThis.response += "status changed " + sessionId + " " + status + " " + networkId;
}
......@@ -560,37 +361,10 @@ save(deviceId: string, callback: AsyncCallback&lt;SaveSuccessResponse&gt;): void
**示例：**
FA模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false});
g_object.setSessionId("123456");
g_object.save("local", (result) => {
console.log("save callback");
console.info("save sessionId: " + result.sessionId);
console.info("save version: " + result.version);
console.info("save deviceId: " + result.deviceId);
});
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
}
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false});
g_object.setSessionId("123456");
g_object.save("local", (result) => {
console.log("save callback");
console.info("save callback");
console.info("save sessionId: " + result.sessionId);
console.info("save version: " + result.version);
console.info("save deviceId: " + result.deviceId);
......@@ -627,40 +401,10 @@ save(deviceId: string): Promise&lt;SaveSuccessResponse&gt;
**示例：**
FA模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context,{name:"Amy", age:18, isVis:false});
g_object.setSessionId("123456");
g_object.save("local").then((result) => {
console.log("save callback");
console.info("save sessionId " + result.sessionId);
console.info("save version " + result.version);
console.info("save deviceId " + result.deviceId);
}, () => {
console.error("save failed");
});
```
Stage模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context
}
}
let g_object = distributedObject.create(context,{name:"Amy", age:18, isVis:false});
g_object.setSessionId("123456");
g_object.save("local").then((result) => {
console.log("save callback");
console.info("save callback");
console.info("save sessionId " + result.sessionId);
console.info("save version " + result.version);
console.info("save deviceId " + result.deviceId);
......@@ -688,54 +432,19 @@ revokeSave(callback: AsyncCallback&lt;RevokeSaveSuccessResponse&gt;): void
**示例：**
FA模型示例
```js
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false});
g_object.setSessionId("123456");
// 持久化数据
g_object.save("local", (result) => {
console.log("save callback");
console.info("save sessionId " + result.sessionId);
console.info("save version " + result.version);
console.info("save deviceId " + result.deviceId);
});
// 删除持久化保存的数据
g_object.revokeSave((result) => {
console.log("revokeSave callback");
console.log("revokeSave sessionId " + result.sessionId);
});
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage) {
context = this.context
}
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false});
g_object.setSessionId("123456");
// 持久化数据
g_object.save("local", (result) => {
console.log("save callback");
console.info("save callback");
console.info("save sessionId " + result.sessionId);
console.info("save version " + result.version);
console.info("save deviceId " + result.deviceId);
});
// 删除持久化保存的数据
g_object.revokeSave((result) => {
console.log("revokeSave callback");
console.log("revokeSave sessionId " + result.sessionId);
console.info("revokeSave callback");
console.info("revokeSave sessionId " + result.sessionId);
});
```
......@@ -758,18 +467,11 @@ revokeSave(): Promise&lt;RevokeSaveSuccessResponse&gt;
**示例：**
FA模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import featureAbility from '@ohos.ability.featureAbility';
// 获取context
let context = featureAbility.getContext();
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false});
g_object.setSessionId("123456");
// 持久化数据
g_object.save("local").then((result) => {
console.log("save callback");
console.info("save callback");
console.info("save sessionId " + result.sessionId);
console.info("save version " + result.version);
console.info("save deviceId " + result.deviceId);
......@@ -778,40 +480,8 @@ g_object.save("local").then((result) => {
});
// 删除持久化保存的数据
g_object.revokeSave().then((result) => {
console.log("revokeSave callback");
console.log("sessionId" + result.sessionId);
}, () => {
console.error("revokeSave failed");
});
```
Stage模型示例
```ts
import distributedObject from '@ohos.data.distributedDataObject';
import UIAbility from '@ohos.app.ability.UIAbility';
// 获取context
let context;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage) {
context = this.context
}
}
let g_object = distributedObject.create(context, {name:"Amy", age:18, isVis:false});
g_object.setSessionId("123456");
g_object.save("local").then((result) => {
console.log("save callback");
console.info("save sessionId " + result.sessionId);
console.info("save version " + result.version);
console.info("save deviceId " + result.deviceId);
}, () => {
console.error("save failed");
});
// 删除持久化保存的数据
g_object.revokeSave().then((result) => {
console.log("revokeSave callback");
console.log("sessionId" + result.sessionId);
console.info("revokeSave callback");
console.info("sessionId" + result.sessionId);
}, () => {
console.error("revokeSave failed");
});
......@@ -852,7 +522,7 @@ let g_object = distributedObject.createDistributedObject({name:"Amy", age:18, is
## DistributedObject<sup>(deprecated)</sup>
表示一个分布式数据对象。
表示一个分布式数据对象。在使用以下接口前，需调用[createDistributedObject()](#distributedobjectcreatedistributedobjectdeprecated)获取DistributedObject对象。
### setSessionId<sup>(deprecated)</sup>
......
zh-cn/application-dev/reference/apis/js-apis-data-preferences.md
浏览文件 @ 24337828
......@@ -58,6 +58,7 @@ try {
console.info("Failed to get preferences. code =" + err.code + ", message =" + err.message);
return;
}
preferences = val;
console.info("Succeeded in getting preferences.");
})
} catch (err) {
......@@ -68,26 +69,25 @@ try {
Stage模型示例：
```ts
// 获取context
import UIAbility from '@ohos.app.ability.UIAbility';
let context = null;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context;
}
}
let preferences = null;
try {
data_preferences.getPreferences(context, 'mystore', function (err, val) {
if (err) {
console.info("Failed to get preferences. code =" + err.code + ", message =" + err.message);
return;
}
console.info("Succeeded in getting preferences.");
})
} catch (err) {
console.info("Failed to get preferences. code =" + err.code + ", message =" + err.message);
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage) {
try {
data_preferences.getPreferences(this.context, 'mystore', function (err, val) {
if (err) {
console.info("Failed to get preferences. code =" + err.code + ", message =" + err.message);
return;
}
preferences = val;
console.info("Succeeded in getting preferences.");
})
} catch (err) {
console.info("Failed to get preferences. code =" + err.code + ", message =" + err.message);
}
}
}
```
......@@ -128,36 +128,34 @@ try {
preferences = object;
console.info("Succeeded in getting preferences.");
}).catch((err) => {
console.log("Failed to get preferences. code =" + err.code + ", message =" + err.message);
console.info("Failed to get preferences. code =" + err.code + ", message =" + err.message);
})
} catch(err) {
console.log("Failed to get preferences. code =" + err.code + ", message =" + err.message);
console.info("Failed to get preferences. code =" + err.code + ", message =" + err.message);
}
```
Stage模型示例：
```ts
// 获取context
import UIAbility from '@ohos.app.ability.UIAbility';
let context = null;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context;
}
}
let preferences = null;
try {
let promise = data_preferences.getPreferences(context, 'mystore');
promise.then((object) => {
preferences = object;
console.info("Succeeded in getting preferences.");
}).catch((err) => {
console.log("Failed to get preferences. code =" + err.code + ", message =" + err.message);
})
} catch(err) {
console.log("Failed to get preferences. code =" + err.code + ", message =" + err.message);
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage) {
try {
let promise = data_preferences.getPreferences(this.context, 'mystore');
promise.then((object) => {
preferences = object;
console.info("Succeeded in getting preferences.");
}).catch((err) => {
console.info("Failed to get preferences. code =" + err.code + ", message =" + err.message);
})
} catch(err) {
console.info("Failed to get preferences. code =" + err.code + ", message =" + err.message);
}
}
}
```
......@@ -214,25 +212,21 @@ try {
Stage模型示例：
```ts
// 获取context
import UIAbility from '@ohos.app.ability.UIAbility';
let context = null;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context;
}
}
try {
data_preferences.deletePreferences(context, 'mystore', function (err, val) {
if (err) {
onWindowStageCreate(windowStage) {
try {
data_preferences.deletePreferences(this.context, 'mystore', function (err, val) {
if (err) {
console.info("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
return;
}
console.info("Succeeded in deleting preferences." );
})
} catch (err) {
console.info("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
return;
}
console.info("Succeeded in deleting preferences." );
})
} catch (err) {
console.info("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
}
}
```
......@@ -293,25 +287,21 @@ try {
Stage模型示例：
```ts
// 获取context
import UIAbility from '@ohos.app.ability.UIAbility';
let context = null;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context;
onWindowStageCreate(windowStage) {
try{
let promise = data_preferences.deletePreferences(this.context, 'mystore');
promise.then(() => {
console.info("Succeeded in deleting preferences.");
}).catch((err) => {
console.info("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
})
} catch(err) {
console.info("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
}
}
}
try{
let promise = data_preferences.deletePreferences(context, 'mystore');
promise.then(() => {
console.info("Succeeded in deleting preferences.");
}).catch((err) => {
console.info("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
})
} catch(err) {
console.info("Failed to delete preferences. code =" + err.code + ", message =" + err.message);
}
```
## data_preferences.removePreferencesFromCache
......@@ -357,25 +347,21 @@ try {
Stage模型示例：
```ts
// 获取context
import UIAbility from '@ohos.app.ability.UIAbility';
let context = null;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context;
}
}
try {
data_preferences.removePreferencesFromCache(context, 'mystore', function (err, val) {
if (err) {
onWindowStageCreate(windowStage) {
try {
data_preferences.removePreferencesFromCache(this.context, 'mystore', function (err, val) {
if (err) {
console.info("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
return;
}
console.info("Succeeded in removing preferences.");
})
} catch (err) {
console.info("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
return;
}
console.info("Succeeded in removing preferences.");
})
} catch (err) {
console.info("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
}
}
```
......@@ -427,25 +413,22 @@ try {
Stage模型示例：
```ts
// 获取context
import UIAbility from '@ohos.app.ability.UIAbility';
let context = null;
class EntryAbility extends UIAbility {
onWindowStageCreate(windowStage){
context = this.context;
onWindowStageCreate(windowStage) {
try {
let promise = data_preferences.removePreferencesFromCache(this.context, 'mystore');
promise.then(() => {
console.info("Succeeded in removing preferences.");
}).catch((err) => {
console.info("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
})
} catch(err) {
console.info("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
}
}
}
try {
let promise = data_preferences.removePreferencesFromCache(context, 'mystore');
promise.then(() => {
console.info("Succeeded in removing preferences.");
}).catch((err) => {
console.info("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
})
} catch(err) {
console.info("Failed to remove preferences. code =" + err.code + ", message =" + err.message);
}
```
## Preferences
......@@ -794,10 +777,10 @@ try {
promise.then(() => {
console.info("Succeeded in deleting the key 'startup'.");
}).catch((err) => {
console.log("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
console.info("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
})
} catch(err) {
console.log("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
console.info("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
}
```
......
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