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Fix swiper TouchMove to normal page scrolling caused by `preventDef… #298

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Fix swiper TouchMove to normal page scrolling caused by `preventDef… #298

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57 changes: 33 additions & 24 deletions src/components/swiper/swiper.js
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Original file line number Diff line number Diff line change
Expand Up @@ -99,50 +99,59 @@ class Swiper extends Component {
//console.log($container.offsetWidth, $container.offsetHeight)
}

handleTouchStart(e){
handleTouchStart(e) {
if (this.state.touching || this.props.children.length <= 1) return;

let og = 0;
const { pageX, pageY, identifier } = e.targetTouches[0];

if (this.props.direction === 'horizontal'){
og = e.targetTouches[0].pageX - this.state.translate;
if (this.props.direction === 'horizontal') {
og = pageX - this.state.translate;
} else {
og = e.targetTouches[0].pageY - this.state.translate;
og = pageY - this.state.translate;
}

this.setState({
touching: true,
ogTranslate: this.state.translate,
touchId: e.targetTouches[0].identifier,
og: og,
animating: false
touchId: identifier,
og: og,
animating: false,
startPoint: {
pageX,
pageY
}
});

}

handleTouchMove(e){
handleTouchMove(e) {
if (!this.state.touching || this.props.children.length <= 1) return;
if (e.targetTouches[0].identifier !== this.state.touchId) return;

//prevent move background
e.preventDefault();

let diff = this.state.translate;

if (this.props.direction === 'horizontal'){
const pageX = e.targetTouches[0].pageX;
diff = pageX - this.state.og;

const { startPoint } = this.state;
const { pageX, pageY } = e.targetTouches[0];
const moveX = Math.abs(pageX - startPoint.pageX);
const moveY = Math.abs(pageY - startPoint.pageY);

if (this.props.direction === 'horizontal') {
if (moveX >= moveY) {
diff = pageX - this.state.og;
}
} else {
//vertical
const pageY = e.targetTouches[0].pageY;
diff = pageY - this.state.og;

if (moveY >= moveX) {
diff = pageY - this.state.og;
}
}

this.setState({
translate: diff
});
if (diff !== this.state.translate) {
//prevent move background
e.preventDefault();
this.setState({
translate: diff
});
}
}

handleTouchEnd(e){
Expand Down Expand Up @@ -245,7 +254,7 @@ class Swiper extends Component {
{
children.map( (child, i) => {
return React.cloneElement(child, {
className: classNames('react-weui-swiper__item', child.className),
className: classNames('react-weui-swiper__item', child.props.className),
key: i,
style: Object.assign({}, child.props.style, {
display: direction === 'horizontal' ? 'inline-block' : 'block',
Expand Down