vaneditor/src/uni_modules/zebra-swiper/libs/loop/loopFix.js

``` 移动端ui框架统一用uView,css扩展语言用scss,全局数据管理vuex,统一样式主体风格颜色定义/src/uni.scss ```

export default function loopFix() {
	const swiper = this;
	swiper.emit('beforeLoopFix');
	const {
		activeIndex,
		slides,
		loopedSlides,
		allowSlidePrev,
		allowSlideNext,
		snapGrid,
		rtlTranslate: rtl
	} = swiper;
	let newIndex;
	swiper.allowSlidePrev = true;
	swiper.allowSlideNext = true;
	const snapTranslate = -snapGrid[activeIndex];
	const diff = snapTranslate - swiper.getTranslate();

	if (activeIndex < loopedSlides) {
		newIndex = slides.length - loopedSlides * 3 + activeIndex;
		newIndex += loopedSlides;
		const slideChanged = swiper.slideTo(newIndex, 0, false, true);

		if (slideChanged && diff !== 0) {
			swiper.setTranslate((rtl ? -swiper.translate : swiper.translate) - diff);
		}
	} else if (activeIndex >= slides.length - loopedSlides) {
		newIndex = -slides.length + activeIndex + loopedSlides;
		newIndex += loopedSlides;
		const slideChanged = swiper.slideTo(newIndex, 0, false, true);

		if (slideChanged && diff !== 0) {
			swiper.setTranslate((rtl ? -swiper.translate : swiper.translate) - diff);
		}
	}

	swiper.allowSlidePrev = allowSlidePrev;
	swiper.allowSlideNext = allowSlideNext;
	swiper.emit('loopFix');
}