Apple-Animationsproblem bei Verwendung von React und Inline-CSS

Question

Ich versuche, diese Animation in React mit HTML und CSS unter Verwendung von Inline-Stilen und TypeScript neu zu erstellen. Ich erstelle ein Objekt mit Stilinformationen und verweise im Stilattribut darauf. Unten ist der Code. Es funktioniert nicht, ich bin mir nicht sicher, was ich falsch mache. Ich vermute, dass die Stile nicht richtig definiert und referenziert sind?

Dies ist das ursprüngliche Codepen-Beispiel, das ich neu zu schreiben versucht habe: Apple Animation

Das ist mein Code

import React from 'react';

const styles = {
    
    '@keyframes showTopText': {
        '0%': { transform: 'translate3d(0, 100%, 0)' },
        '40%, 60%': { transform: 'translate3d(0, 50%, 0)' },
        '100%': { transform: 'translate3d(0, 0, 0)' },
    },
    '@keyframes showBottomText': {
        '0%': { transform: 'translate3d(0, -100%, 0)' },
        '100%': { transform: 'translate3d(0, 0, 0)' },
    },

    animatedTitle: {
        color: '#222',
        fontFamily: 'Roboto, Arial, sans-serif',
        height: '90vmin',
        left: '50%',
        top: '50%',
        transform: 'translate(-50%, -50%)',
        width: '90vmin',
    },
    'animatedTitle > div': {
        height: '50%',
        overflow: 'hidden',
        position: 'absolute',
        width: '100%',
    },
    'animatedTitle > div div': {
        fontSize: '12vmin',
        padding: '2vmin 0',
        position: 'absolute',
    },
    'animatedTitle > div div span': {
        display: 'block',
    },
    'animated-title > div.text-top': {
        borderBottom: '1vmin solid #000',
        top: 0,
    },
    'animatedTitle > div.text-top div': {
        animation: 'showTopText 1s',
        animationDelay: '0.5s',
        animationFillMode: 'forwards',
        bottom: 0,
        transform: 'translate(0, 100%)',
    },
    'animatedTitle > div.text-top div span:first-child': {
        color: '#767676',
    },
    'animatedTitle > div.text-bottom': {
        bottom: 0,
    },
    'animatedTitle > div.text-bottom div': {
        animation: 'showBottomText 0.5s',
        animationDelay: '1.75s',
        animationFillMode: 'forwards',
        top: 0,
        transform: 'translate(0, -100%)',
    },
};

function Design() {
    return (
        <div style={styles.animatedTitle}>
            <div style={styles['animatedTitle > div.text-top div']}>
                <div>
                    <span>mimicking</span>
                    <span>apple's design</span>
                </div>
            </div>
            <div style={styles['animatedTitle > div.text-bottom']}>
                <div>for the win!</div>
            </div>
        </div>
    );
}

export { Design };

Answer 1

您可以尝试使用 styled-components 来使您的组件更灵活和兼容。我使用 styled-components 复制了 codepen 的示例，并使其易于扩展。

因此，TopAnimateBlock 和 BottomAnimateBlock 都有 numOfLine 属性，表示块内有多少行。在 BottomAnimateBlock 中的第二个属性是 delayTopLine，它应该与 TopAnimateBlock 中的 numOfLine 数量相同，因为我们需要等待顶部行播放。

此外，您可以通过 TextStyle 的 color 属性轻松更改文本颜色，并传递颜色值，HEX 颜色或 rgba() / hsla()。

TextAnimation.tsx

import styled, { keyframes } from 'styled-components';

const showTopText = keyframes`
  0% { transform: translate3d(0, 100% , 0); }
  40%, 60% { transform: translate3d(0, 50%, 0); }
  100% { transform: translate3d(0, 0, 0); }
`;
const showBottomText = keyframes`
  0% { transform: translate3d(0, -100%, 0); }
  100% { transform: translate3d(0, 0, 0); }
`;

const Section = styled.section`
  width: calc(100% + 10vmin);
  display: flex;
  flex-flow: column;
  padding: 2vmin 0;
  overflow: hidden;
  &:last-child {
    border-top: 1vmin solid white;
  }
`;

const Block = styled.div<{ numOfLine: number }>`
  position: relative;
`;
const TopAnimateBlock = styled(Block)`
  animation: ${showTopText} calc(0.5s * ${props => props.numOfLine}) forwards;
  animation-delay: 0.5s;
  transform: translateY(calc(100% * ${props => props.numOfLine}));
`;
const BottomAnimateBlock = styled(Block)<{ delayTopLine: number }>`
  animation: ${showBottomText} calc(0.5s * ${props => props.numOfLine}) forwards;
  animation-delay: calc(0.7s * ${props => props.delayTopLine});
  transform: translateY(calc(-100% * ${props => props.numOfLine}));
`;

const TextStyle = styled.p<{ color: string }>`
  font-family: Roboto, Arial, sans-serif;
  font-size: 12vmin;
  color: ${props => props.color};
`;

export const TextAnimation = () => {
  return (
    <>
      <Section>
        <TopAnimateBlock numOfLine={2}>
          <TextStyle color="grey">mimicking</TextStyle>
          <TextStyle color="white">apple's design</TextStyle>
        </TopAnimateBlock>
      </Section>
      <Section>
        <BottomAnimateBlock numOfLine={1} delayTopLine={2}>
          <TextStyle color="white">for the win!</TextStyle>
        </BottomAnimateBlock>
      </Section>
    </>
  );
};

如果我们想要动画化3行而不是2行，只需添加/更改：

1. 添加新的 TextStyle 组件
2. 在 TopAnimateBlock 中将 numOfLine 从2更改为3，在 BottomAnimateBlock 中将 delayTopLine 从2更改为3
3. 并将关键帧替换为以下片段：

const showTopText = keyframes`
  0% { transform: translate3d(0, 100% , 0); }
  25%, 40% { transform: translate3d(0, 66%, 0); }
  60%, 75% { transform: translate3d(0, 33%, 0); }
  100% { transform: translate3d(0, 0, 0); }
`;