每张幻灯片的水平ScrollMagic容器中的视差内容都是断断续续的

Question

通过更新内部包装器的X值，我有一个固定的滑块，当你到达它时，它会水平移动。这部分效果很好。

但是，对于每个单独的幻灯片，我希望对文本具有视差效果（在滚动时变慢 - 相对于当前幻灯片）。

这是我设置的一个小（简化）测试用例：https://codepen.io/michaelpumo/pen/EJgWgd

不幸的是，由于某些原因，文本似乎错开，动画也不顺畅。这可能与我误解了ScrollMagic的API（对我而言是新的）。

我有2个控制器，因为我能获得“视差”部分的唯一方法是将控制器设置为第二个控制器vertical: false。也许这与此有关？

非常感谢帮助！

JavaScript的

const ease = window.Power4.easeInOut
const el = document.querySelector('#el')
const wrapper = document.querySelector('#wrapper')
const slides = el.querySelectorAll('.El__slide')
const amount = slides.length
const controller = new window.ScrollMagic.Controller()
const horizontalMovement = new window.TimelineMax()

const controller2 = new window.ScrollMagic.Controller({
  vertical: false
})

horizontalMovement
  .add([
    window.TweenMax.to(wrapper, 1, {
      x: `-${(100 / amount) * (amount - 1)}%`
    })
  ])

new window.ScrollMagic.Scene({
    triggerElement: el,
    triggerHook: 'onLeave',
    duration: `${amount * 100}%`
  })
  .setPin(el)
  .setTween(horizontalMovement)
  .addTo(controller)

slides.forEach((item, index) => {
  const title = item.querySelector('h1')
  const subtitle = item.querySelector('h2')
  const tween = new window.TimelineMax()

  tween
    .fromTo(title, 1, { x: 0 }, { x: 500 }, 0)
    .fromTo(subtitle, 1, { x: 600 }, { x: 500 }, 0)

  new window.ScrollMagic.Scene({
      triggerElement: item,
      triggerHook: 1,
      duration: '100%'
    })
    .setTween(tween)
    .addTo(controller2)
})

SCSS

.El {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  &__wrapper {
    display: flex;
    width: 400vw;
    height: 100vh;
  }
  &__slide {
    display: flex;
    align-items: center;
    width: 100vw;
    padding: 50px;
    &:nth-child(1) {
      background-color: salmon;
    }
    &:nth-child(2) {
      background-color: blue;
    }
    &:nth-child(3) {
      background-color: orange;
    }
    &:nth-child(4) {
      background-color: tomato;
    }
  }
  &__content {
    width: 100%;
  }
  &__title,
  &__subtitle {
    position: relative;
  }
}

HTML

<div id="el" class="El">
  <div id="wrapper" class="El__wrapper">
    <div class="El__slide">
      <div class="El__content">
        <h1 class="El__title">Title A</h1>
        <h2 class="El__subtitle">Subtitle A</h2>
      </div>
    </div>
    <div class="El__slide">
      <div class="El__content">
        <h1 class="El__title">Title B</h1>
        <h2 class="El__subtitle">Subtitle B</h2>
      </div>
    </div>
    <div class="El__slide">
      <div class="El__content">
        <h1 class="El__title">Title C</h1>
        <h2 class="El__subtitle">Subtitle C</h2>
      </div>
    </div>
    <div class="El__slide">
      <div class="El__content">
        <h1 class="El__title">Title D</h1>
        <h2 class="El__subtitle">Subtitle D</h2>
      </div>
    </div>
  </div>
</div>

Answer 1

要使用ScrollMagic方法获得所需的效果，您必须将refreshInterval：1设置为controller2。

文档：qazxsw poi

示例：http://scrollmagic.io/docs/ScrollMagic.Controller.html#constructor

https://codepen.io/biomagic/pen/dLgzJO

另一种方法。您可以将tweenChanges：true添加到场景中。

文档：

const ease = window.Power4.easeInOut
const el = document.querySelector('#el')
const wrapper = document.querySelector('#wrapper')
const slides = el.querySelectorAll('.El__slide')
const amount = slides.length
const controller = new window.ScrollMagic.Controller()
const horizontalMovement = new window.TimelineMax()

const controller2 = new window.ScrollMagic.Controller({
  vertical: false,
  refreshInterval: 1
})

horizontalMovement
  .add([
    window.TweenMax.to(wrapper, 1, { x: `-${(100 / amount) * (amount - 1)}%` })
  ])

new window.ScrollMagic.Scene({
  triggerElement: el,
  triggerHook: 'onLeave',
  duration: `${amount * 100}%`
})
  .setPin(el)
  .setTween(horizontalMovement)
  .addTo(controller)

slides.forEach((item, index) => {
  const title = item.querySelector('h1')
  const subtitle = item.querySelector('h2')
  const tween = new window.TimelineMax()
  tween
    .fromTo(title, 1, { x: 0 }, { x: 500 }, 0)
    .fromTo(subtitle, 1, { x: 600 }, { x: 500 }, 0)
  new window.ScrollMagic.Scene({
    triggerElement: item,
    triggerHook: 1,
    duration: '100%'
  })
  .setTween(tween)
  .addTo(controller2)
})

示例：http://scrollmagic.io/docs/animation.GSAP.html#newScrollMagic.Sceneoptions

https://codepen.io/biomagic/pen/rbqpMb

Answer 2

我不确定我是否理解了你问题的本质。因为我的母语不同。但是，我想帮助你。对于流畅的文本移动，这将帮助您：

const ease = window.Power4.easeInOut
const el = document.querySelector('#el')
const wrapper = document.querySelector('#wrapper')
const slides = el.querySelectorAll('.El__slide')
const amount = slides.length
const controller = new window.ScrollMagic.Controller()
const horizontalMovement = new window.TimelineMax()

const controller2 = new window.ScrollMagic.Controller({
  vertical: false
})

horizontalMovement
  .add([
    window.TweenMax.to(wrapper, 1, { x: `-${(100 / amount) * (amount - 1)}%` })
  ])

new window.ScrollMagic.Scene({
  triggerElement: el,
  triggerHook: 'onLeave',
  duration: `${amount * 100}%`
})
  .setPin(el)
  .setTween(horizontalMovement)
  .addTo(controller)

slides.forEach((item, index) => {
  const title = item.querySelector('h1')
  const subtitle = item.querySelector('h2')
  const tween = new window.TimelineMax()
  tween
    .fromTo(title, 1, { x: 0 }, { x: 500 }, 0)
    .fromTo(subtitle, 1, { x: 600 }, { x: 500 }, 0)
  new window.ScrollMagic.Scene({
    triggerElement: item,
    triggerHook: 1,
    duration: '100%',
    tweenChanges: true
  })
  .setTween(tween)
  .addTo(controller2)
})

如果我误解了你，那么告诉我一个你最终需要的例子。然后我会尽力帮忙。

Answer 3

我已经测试了你的代码并且看起来很不错。如果你想要一个平滑的行为来添加到CSS的过渡，我可以推荐你。通过这种方式，您将获得平稳过渡。

只需添加以下行：

.El__title, .El__subtitle {
    position: relative;
    transition-property: all;
    transition-duration: 900ms;
    transition-timing-function: ease;
    transition-delay: 0s;
}

你可以改变效果和时间。我发给你一个文档的链接：

&__title,
&__subtitle {
  position: relative;
}

/* Add the next lines */
&__title {
  transition: all .1s linear;
}