Я использую компонент Gosha's Floating Label Input , но анимация не совсем приятна для анимации fontSize. Я попытался увеличить toValue
Animated.timing, но не повезло. Какую часть мне нужно изменить, чтобы сделать ее гладкой? Пожалуйста, совет.
import React, { Component } from 'react';
import { View, TextInput, Animated, Easing } from 'react-native';
export class FloatingLabelInput extends Component {
state = {
isFocused: false,
value: ''
};
componentWillMount() {
this._animatedIsFocused = new Animated.Value(0);
}
handleFocus = () => this.setState({ isFocused: true });
handleBlur = () => this.setState({ isFocused: false });
handleTextChange = (newText) => this.setState({ value: newText });
componentDidUpdate() {
if (this.state.value == "") {
Animated.timing(this._animatedIsFocused, {
toValue: this.state.isFocused ? 1 : 0,
duration: 200,
}).start();
}
}
render() {
const { label, ...props } = this.props;
const labelBoxStyle = {
position: 'absolute',
zIndex: 1,
paddingHorizontal: 5,
backgroundColor: '#fff',
left: 20,
top: this._animatedIsFocused.interpolate({
inputRange: [0, 1],
outputRange: [32, 10],
})
};
const labelStyle = {
fontSize: this._animatedIsFocused.interpolate({
inputRange: [0, 1],
outputRange: [18, 14], // Jaggy animation. Change to [18, 18]
// just to see smooth animation.
}),
color: this._animatedIsFocused.interpolate({
inputRange: [0, 1],
outputRange: ['#aaa', '#3b8c00'],
}),
};
const textInputStyle = {
height: 50,
paddingHorizontal: 20,
fontSize: 18,
color: '#000',
borderWidth: 1,
borderColor: '#3b8c00',
borderRadius: 25
};
return (
<View style={{ paddingTop: 18 }}>
<Animated.View style={labelBoxStyle}>
<Animated.Text style={labelStyle}>{label}</Animated.Text>
</Animated.View>
<TextInput
{...props}
style={textInputStyle}
onFocus={this.handleFocus}
onBlur={this.handleBlur}
value={this.state.value}
onChangeText={this.handleTextChange}
/>
</View>
);
}
}