121 lines
3.2 KiB
JavaScript
121 lines
3.2 KiB
JavaScript
/**
|
|
* The examples provided by Facebook are for non-commercial testing and
|
|
* evaluation purposes only.
|
|
*
|
|
* Facebook reserves all rights not expressly granted.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
|
|
* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
|
|
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* @flow
|
|
*/
|
|
'use strict';
|
|
|
|
var React = require('react');
|
|
var ReactNative = require('react-native');
|
|
var {
|
|
AsyncStorage,
|
|
PickerIOS,
|
|
Text,
|
|
View
|
|
} = ReactNative;
|
|
var PickerItemIOS = PickerIOS.Item;
|
|
|
|
var STORAGE_KEY = '@AsyncStorageExample:key';
|
|
var COLORS = ['red', 'orange', 'yellow', 'green', 'blue'];
|
|
|
|
var BasicStorageExample = React.createClass({
|
|
componentDidMount() {
|
|
this._loadInitialState().done();
|
|
},
|
|
|
|
async _loadInitialState() {
|
|
try {
|
|
var value = await AsyncStorage.getItem(STORAGE_KEY);
|
|
if (value !== null){
|
|
this.setState({selectedValue: value});
|
|
this._appendMessage('Recovered selection from disk: ' + value);
|
|
} else {
|
|
this._appendMessage('Initialized with no selection on disk.');
|
|
}
|
|
} catch (error) {
|
|
this._appendMessage('AsyncStorage error: ' + error.message);
|
|
}
|
|
},
|
|
|
|
getInitialState() {
|
|
return {
|
|
selectedValue: COLORS[0],
|
|
messages: [],
|
|
};
|
|
},
|
|
|
|
render() {
|
|
var color = this.state.selectedValue;
|
|
return (
|
|
<View>
|
|
<PickerIOS
|
|
selectedValue={color}
|
|
onValueChange={this._onValueChange}>
|
|
{COLORS.map((value) => (
|
|
<PickerItemIOS
|
|
key={value}
|
|
value={value}
|
|
label={value}
|
|
/>
|
|
))}
|
|
</PickerIOS>
|
|
<Text>
|
|
{'Selected: '}
|
|
<Text style={{color}}>
|
|
{this.state.selectedValue}
|
|
</Text>
|
|
</Text>
|
|
<Text>{' '}</Text>
|
|
<Text onPress={this._removeStorage}>
|
|
Press here to remove from storage.
|
|
</Text>
|
|
<Text>{' '}</Text>
|
|
<Text>Messages:</Text>
|
|
{this.state.messages.map((m) => <Text key={m}>{m}</Text>)}
|
|
</View>
|
|
);
|
|
},
|
|
|
|
async _onValueChange(selectedValue) {
|
|
this.setState({selectedValue});
|
|
try {
|
|
await AsyncStorage.setItem(STORAGE_KEY, selectedValue);
|
|
this._appendMessage('Saved selection to disk: ' + selectedValue);
|
|
} catch (error) {
|
|
this._appendMessage('AsyncStorage error: ' + error.message);
|
|
}
|
|
},
|
|
|
|
async _removeStorage() {
|
|
try {
|
|
await AsyncStorage.removeItem(STORAGE_KEY);
|
|
this._appendMessage('Selection removed from disk.');
|
|
} catch (error) {
|
|
this._appendMessage('AsyncStorage error: ' + error.message);
|
|
}
|
|
},
|
|
|
|
_appendMessage(message) {
|
|
this.setState({messages: this.state.messages.concat(message)});
|
|
},
|
|
});
|
|
|
|
exports.title = 'AsyncStorage';
|
|
exports.description = 'Asynchronous local disk storage.';
|
|
exports.examples = [
|
|
{
|
|
title: 'Basics - getItem, setItem, removeItem',
|
|
render(): ReactElement { return <BasicStorageExample />; }
|
|
},
|
|
];
|