(28)-弹出框API
最后更新于：2022-04-01 06:50:49
> [AlertIOS](http://facebook.github.io/react-native/docs/alertios.html#content)
> [react-native在线运行器](https://rnplay.org/)
## 方法
* static alert(title: string, message?: string, buttons?: Array, type?: string)：无输入弹出框
* static prompt(title: string, value?: string, buttons?: Array, callback?: Function):带输入框的弹出框
## 实例
~~~
/**
* 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-native');
var {
StyleSheet,
View,
Text,
TouchableHighlight,
AlertIOS,
} = React;
exports.framework = 'React';
exports.title = 'AlertIOS';
exports.description = 'iOS alerts and action sheets';
exports.examples = [{
title: 'Alerts',
render() {
return (
<View>
<TouchableHighlight style={styles.wrapper}
onPress={() => AlertIOS.alert(
'Foo Title',
'My Alert Msg'
)}>
<View style={styles.button}>
<Text>Alert with message and default button</Text>
</View>
</TouchableHighlight>
<TouchableHighlight style={styles.wrapper}
onPress={() => AlertIOS.alert(
null,
null,
[
{text: 'Button', onPress: () => console.log('Button Pressed!')},
]
)}>
<View style={styles.button}>
<Text>Alert with only one button</Text>
</View>
</TouchableHighlight>
<TouchableHighlight style={styles.wrapper}
onPress={() => AlertIOS.alert(
'Foo Title',
'My Alert Msg',
[
{text: 'Foo', onPress: () => console.log('Foo Pressed!')},
{text: 'Bar', onPress: () => console.log('Bar Pressed!')},
]
)}>
<View style={styles.button}>
<Text>Alert with two buttons</Text>
</View>
</TouchableHighlight>
<TouchableHighlight style={styles.wrapper}
onPress={() => AlertIOS.alert(
'Foo Title',
null,
[
{text: 'Foo', onPress: () => console.log('Foo Pressed!')},
{text: 'Bar', onPress: () => console.log('Bar Pressed!')},
{text: 'Baz', onPress: () => console.log('Baz Pressed!')},
]
)}>
<View style={styles.button}>
<Text>Alert with 3 buttons</Text>
</View>
</TouchableHighlight>
<TouchableHighlight style={styles.wrapper}
onPress={() => AlertIOS.alert(
'Foo Title',
'My Alert Msg',
'..............'.split('').map((dot, index) => ({
text: 'Button ' + index,
onPress: () => console.log('Pressed ' + index)
}))
)}>
<View style={styles.button}>
<Text>Alert with too many buttons</Text>
</View>
</TouchableHighlight>
</View>
);
}
},
{
title: 'Prompt',
render(): React.Component {
return <PromptExample />
}
}];
class PromptExample extends React.Component {
constructor(props) {
super(props);
this.promptResponse = this.promptResponse.bind(this);
this.state = {
promptValue: undefined,
};
this.title = 'Type a value';
this.defaultValue = 'Default value';
this.buttons = [{
text: 'Custom cancel',
}, {
text: 'Custom OK',
onPress: this.promptResponse
}];
}
render() {
return (
<View>
<Text style={{marginBottom: 10}}>
<Text style={{fontWeight: 'bold'}}>Prompt value:</Text> {this.state.promptValue}
</Text>
<TouchableHighlight
style={styles.wrapper}
onPress={this.prompt.bind(this, this.title, this.promptResponse)}>
<View style={styles.button}>
<Text>
prompt with title & callback
</Text>
</View>
</TouchableHighlight>
<TouchableHighlight
style={styles.wrapper}
onPress={this.prompt.bind(this, this.title, this.buttons)}>
<View style={styles.button}>
<Text>
prompt with title & custom buttons
</Text>
</View>
</TouchableHighlight>
<TouchableHighlight
style={styles.wrapper}
onPress={this.prompt.bind(this, this.title, this.defaultValue, this.promptResponse)}>
<View style={styles.button}>
<Text>
prompt with title, default value & callback
</Text>
</View>
</TouchableHighlight>
<TouchableHighlight
style={styles.wrapper}
onPress={this.prompt.bind(this, this.title, this.defaultValue, this.buttons)}>
<View style={styles.button}>
<Text>
prompt with title, default value & custom buttons
</Text>
</View>
</TouchableHighlight>
</View>
);
}
prompt() {
// Flow's apply support is broken: #7035621
((AlertIOS.prompt: any).apply: any)(AlertIOS, arguments);
}
promptResponse(promptValue) {
this.setState({ promptValue });
}
}
var styles = StyleSheet.create({
wrapper: {
borderRadius: 5,
marginBottom: 5,
},
button: {
backgroundColor: '#eeeeee',
padding: 10,
},
});
~~~
## 效果
## alert
## prompt
