Question

Ionic4项目中我们可以使用Ionic4轮播图组件ion-slides对项目进行布局。

ion-slides官方文档地址:https://ionicframework.com/docs/api/slides

The Slides component is a multi-section container. Each section can be swiped or dragged between. It contains any number of Slide components.

Adopted from Swiper.js: The most modern mobile touch slider and framework with hardware accelerated transitions.

http://www.idangero.us/swiper/

Copyright 2016, Vladimir Kharlampidi The iDangero.us http://www.idangero.us/

Licensed under MIT

Custom Animations

By default, Ionic slides use the built-in slide animation effect. Custom animations can be provided via the options property. Examples of other animations can be found below.

Coverflow

const slidesOpts = {
  slidesPerView: 3,
  coverflowEffect: {
    rotate: 50,
    stretch: 0,
    depth: 100,
    modifier: 1,
    slideShadows: true,
  },
  on: {
    beforeInit() {
      const swiper = this;

      swiper.classNames.push(`${swiper.params.containerModifierClass}coverflow`);
      swiper.classNames.push(`${swiper.params.containerModifierClass}3d`);

      swiper.params.watchSlidesProgress = true;
      swiper.originalParams.watchSlidesProgress = true;
    },
    setTranslate() {
      const swiper = this;
      const {
        width: swiperWidth, height: swiperHeight, slides, $wrapperEl, slidesSizesGrid, $
      } = swiper;
      const params = swiper.params.coverflowEffect;
      const isHorizontal = swiper.isHorizontal();
      const transform$$1 = swiper.translate;
      const center = isHorizontal ? -transform$$1 + (swiperWidth / 2) : -transform$$1 + (swiperHeight / 2);
      const rotate = isHorizontal ? params.rotate : -params.rotate;
      const translate = params.depth;
      // Each slide offset from center
      for (let i = 0, length = slides.length; i < length; i += 1) {
        const $slideEl = slides.eq(i);
        const slideSize = slidesSizesGrid[i];
        const slideOffset = $slideEl[0].swiperSlideOffset;
        const offsetMultiplier = ((center - slideOffset - (slideSize / 2)) / slideSize) * params.modifier;

         let rotateY = isHorizontal ? rotate * offsetMultiplier : 0;
        let rotateX = isHorizontal ? 0 : rotate * offsetMultiplier;
        // var rotateZ = 0
        let translateZ = -translate * Math.abs(offsetMultiplier);

         let translateY = isHorizontal ? 0 : params.stretch * (offsetMultiplier);
        let translateX = isHorizontal ? params.stretch * (offsetMultiplier) : 0;

         // Fix for ultra small values
        if (Math.abs(translateX) < 0.001) translateX = 0;
        if (Math.abs(translateY) < 0.001) translateY = 0;
        if (Math.abs(translateZ) < 0.001) translateZ = 0;
        if (Math.abs(rotateY) < 0.001) rotateY = 0;
        if (Math.abs(rotateX) `);
            $slideEl.append($shadowBeforeEl);
          }
          if ($shadowAfterEl.length === 0) {
            $shadowAfterEl = swiper.$(`${isHorizontal ? 'right' : 'bottom'}">`);
            $slideEl.append($shadowAfterEl);
          }
          if ($shadowBeforeEl.length) $shadowBeforeEl[0].style.opacity = offsetMultiplier > 0 ? offsetMultiplier : 0;
          if ($shadowAfterEl.length) $shadowAfterEl[0].style.opacity = (-offsetMultiplier) > 0 ? -offsetMultiplier : 0;
        }
      }

       // Set correct perspective for IE10
      if (swiper.support.pointerion-slides　事件(Events) || swiper.support.prefixedPointerion-slides　事件(Events)) {
        const ws = $wrapperEl[0].style;
        ws.perspectiveOrigin = `${center}px 50%`;
      }
    },
    setTransition(duration) {
      const swiper = this;
      swiper.slides
        .transition(duration)
        .find('.swiper-slide-shadow-top, .swiper-slide-shadow-right, .swiper-slide-shadow-bottom, .swiper-slide-shadow-left')
        .transition(duration);
    }
  }
}

Cube

const slidesOpts = {
  grabCursor: true,
  cubeEffect: {
    shadow: true,
    slideShadows: true,
    shadowOffset: 20,
    shadowScale: 0.94,
  },
  on: {
    beforeInit: function() {
      const swiper = this;
      swiper.classNames.push(`${swiper.params.containerModifierClass}cube`);
      swiper.classNames.push(`${swiper.params.containerModifierClass}3d`);

      const overwriteParams = {
        slidesPerView: 1,
        slidesPerColumn: 1,
        slidesPerGroup: 1,
        watchSlidesProgress: true,
        resistanceRatio: 0,
        spaceBetween: 0,
        centeredSlides: false,
        virtualTranslate: true,
      };

      this.params = Object.assign(this.params, overwriteParams);
      this.originalParams = Object.assign(this.originalParams, overwriteParams);
    },
    setTranslate: function() {
      const swiper = this;
      const {
        $el, $wrapperEl, slides, width: swiperWidth, height: swiperHeight, rtlTranslate: rtl, size: swiperSize,
      } = swiper;
      const params = swiper.params.cubeEffect;
      const isHorizontal = swiper.isHorizontal();
      const isVirtual = swiper.virtual && swiper.params.virtual.enabled;
      let wrapperRotate = 0;
      let $cubeShadowEl;
      if (params.shadow) {
        if (isHorizontal) {
          $cubeShadowEl = $wrapperEl.find('.swiper-cube-shadow');
          if ($cubeShadowEl.length === 0) {
            $cubeShadowEl = swiper.$('');
            $wrapperEl.append($cubeShadowEl);
          }
          $cubeShadowEl.css({ height: `${swiperWidth}px` });
        } else {
          $cubeShadowEl = $el.find('.swiper-cube-shadow');
          if ($cubeShadowEl.length === 0) {
            $cubeShadowEl = swiper.$('');
            $el.append($cubeShadowEl);
          }
        }
      }

      for (let i = 0; i < slides.length; i += 1) {
        const $slideEl = slides.eq(i);
        let slideIndex = i;
        if (isVirtual) {
          slideIndex = parseInt($slideEl.attr('data-swiper-slide-index'), 10);
        }
        let slideAngle = slideIndex * 90;
        let round = Math.floor(slideAngle / 360);
        if (rtl) {
          slideAngle = -slideAngle;
          round = Math.floor(-slideAngle / 360);
        }
        const progress = Math.max(Math.min($slideEl[0].progress, 1), -1);
        let tx = 0;
        let ty = 0;
        let tz = 0;
        if (slideIndex % 4 === 0) {
          tx = -round * 4 * swiperSize;
          tz = 0;
        } else if ((slideIndex - 1) % 4 === 0) {
          tx = 0;
          tz = -round * 4 * swiperSize;
        } else if ((slideIndex - 2) % 4 === 0) {
          tx = swiperSize + (round * 4 * swiperSize);
          tz = swiperSize;
        } else if ((slideIndex - 3) % 4 === 0) {
          tx = -swiperSize;
          tz = (3 * swiperSize) + (swiperSize * 4 * round);
        }
        if (rtl) {
          tx = -tx;
        }

         if (!isHorizontal) {
          ty = tx;
          tx = 0;
        }

         const transform$$1 = `rotateX(${isHorizontal ? 0 : -slideAngle}deg) rotateY(${isHorizontal ? slideAngle : 0}deg) translate3d(${tx}px, ${ty}px, ${tz}px)`;
        if (progress  -1) {
          wrapperRotate = (slideIndex * 90) + (progress * 90);
          if (rtl) wrapperRotate = (-slideIndex * 90) - (progress * 90);
        }
        $slideEl.transform(transform$$1);
        if (params.slideShadows) {
          // Set shadows
          let shadowBefore = isHorizontal ? $slideEl.find('.swiper-slide-shadow-left') : $slideEl.find('.swiper-slide-shadow-top');
          let shadowAfter = isHorizontal ? $slideEl.find('.swiper-slide-shadow-right') : $slideEl.find('.swiper-slide-shadow-bottom');
          if (shadowBefore.length === 0) {
            shadowBefore = swiper.$(`${isHorizontal ? 'left' : 'top'}">`);
            $slideEl.append(shadowBefore);
          }
          if (shadowAfter.length === 0) {
            shadowAfter = swiper.$(`${isHorizontal ? 'right' : 'bottom'}">`);
            $slideEl.append(shadowAfter);
          }
          if (shadowBefore.length) shadowBefore[0].style.opacity = Math.max(-progress, 0);
          if (shadowAfter.length) shadowAfter[0].style.opacity = Math.max(progress, 0);
        }
      }
      $wrapperEl.css({
        '-webkit-transform-origin': `50% 50% -${swiperSize / 2}px`,
        '-moz-transform-origin': `50% 50% -${swiperSize / 2}px`,
        '-ms-transform-origin': `50% 50% -${swiperSize / 2}px`,
        'transform-origin': `50% 50% -${swiperSize / 2}px`,
      });

       if (params.shadow) {
        if (isHorizontal) {
          $cubeShadowEl.transform(`translate3d(0px, ${(swiperWidth / 2) + params.shadowOffset}px, ${-swiperWidth / 2}px) rotateX(90deg) rotateZ(0deg) scale(${params.shadowScale})`);
        } else {
          const shadowAngle = Math.abs(wrapperRotate) - (Math.floor(Math.abs(wrapperRotate) / 90) * 90);
          const multiplier = 1.5 - (
            (Math.sin((shadowAngle * 2 * Math.PI) / 360) / 2)
            + (Math.cos((shadowAngle * 2 * Math.PI) / 360) / 2)
          );
          const scale1 = params.shadowScale;
          const scale2 = params.shadowScale / multiplier;
          const offset$$1 = params.shadowOffset;
          $cubeShadowEl.transform(`scale3d(${scale1}, 1, ${scale2}) translate3d(0px, ${(sw