TaR1z commented on issue #9239:
URL: https://github.com/apache/echarts/issues/9239#issuecomment-2401182660
如果在微信小程序，可以劫持touchMove事件，设置四周边界，但是不完美，强行移动也会导致无法拖回
`javascript
touchMove(e) {
const chart = this.chart;
const needGesture = this.data.needGesture;
const len = e.touches.length;
const width = this.chart.getWidth();
const height = this.chart.getHeight();
const boundary = {
top: 0,
left: 0,
right: width,
bottom: height,
};
if (chart && len > 0) {
const touch = e.touches[0];
const handler = chart.getZr().handler;
const { x, y } = touch;
if (boundary.top > x || boundary.bottom < x || boundary.right < y ||
boundary.left > y) {
return;
}
if (needGesture && len === TOUCH_POINT_NUM) {
handler.processGesture(wrapTouch(e), 'change');
return;
}
handler.dispatch('mousemove', {
zrX: touch.x,
zrY: touch.y,
preventDefault: () => {},
stopImmediatePropagation: () => {},
stopPropagation: () => {},
});
}
},
`
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