当文本输入被聚焦时,我需要为View的背景颜色设置动画。
我构建了一个具有两个功能的组件onFocus
和onBlur
-这只是来自react-native-reanimated的event
函数。
const onFocus = event<NativeSyntheticEvent<TextInputFocusEventData>>([
{
nativeEvent: ({ target }) => set(colorAnimation, 1)
}
]);
const onBlur = event<NativeSyntheticEvent<TextInputFocusEventData>>([
{
nativeEvent: ({ target }) => set(colorAnimation, 0)
}
]);
我将此函数传递给Animated TextInput,在控制台上没有出现错误,它显示了我设置的自定义背景色。但不要更改“焦点”或“模糊”。
我正在使用打字稿
import React from 'react';
import { NativeSyntheticEvent, TextInputFocusEventData } from 'react-native';
import Reanimated from 'react-native-reanimated';
import { bInterpolateColor } from 'react-native-redash';
import styled from 'styled-components/native';
const { Clock, Value, event, set, debug, block, divide } = Reanimated;
const StyledTextInput = styled.TextInput`
height: 40px;
padding: ${props => props.theme.spacing.default * 2}px
${props => props.theme.spacing.default * 3}px;
`;
const AnimatedTextInput: typeof StyledTextInput = Reanimated.createAnimatedComponent(
StyledTextInput
);
const Container = styled(Reanimated.View)`
width: 100%;
border: 1px solid ${props => props.theme.colors.border};
background: #e3e7eb;
border-radius: ${props => props.theme.shapping.borderRadius * 2};
`;
const TextInput = () => {
const clock = new Clock();
const colorAnimation = new Value(0);
const onFocus = event<NativeSyntheticEvent<TextInputFocusEventData>>([
{
nativeEvent: ({ target }) => set(colorAnimation, 1)
}
]);
const onBlur = event<NativeSyntheticEvent<TextInputFocusEventData>>([
{
nativeEvent: ({ target }) => set(colorAnimation, 0)
}
]);
return (
<Container
style={{
backgroundColor: bInterpolateColor(
colorAnimation,
{ r: 255, g: 0, b: 0 },
{ r: 0, g: 0, b: 255 }
)
}}
>
<AnimatedTextInput onFocus={onFocus} onBlur={onBlur} />
</Container>
);
};
export default TextInput;
答案 0 :(得分:1)
据我所知,您没有正确使用binterpolatecolor。
来自文档:
const bInterpolateColor: (value: Animated.Adaptable<number>, color1: string | number, color2: string | number, colorSpace?: "hsv" | "rgb") => Animated.Node<number>;
您没有提供颜色空间(但这是可选的,所以我不知道它的相关性),而且颜色1和颜色2只能是字符串或数字,并且已经给了它看起来像的对象。
所以这是第一个问题,我也不确定您的容器组件是否可以通过setstate()进行某种状态更改而不会更新,但是我可能是错的,因为无论如何我都不是复活的专家。