plainheart commented on issue #12823:
URL:
https://github.com/apache/incubator-echarts/issues/12823#issuecomment-650902027
@tikeyc Hi~ 能否告知下使用的浏览器以及浏览器的 `navigator.userAgent` ？
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plainheart commented on issue #12823:
URL:
https://github.com/apache/incubator-echarts/issues/12823#issuecomment-647221129
抱歉暂时没有，不确定是否能够修复，这可能需要进行讨论，目前如果确定设备支持触屏，还是建议先手动设置
`touchEventsSupported`为`true`。
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plainheart commented on issue #12823:
URL:
https://github.com/apache/incubator-echarts/issues/12823#issuecomment-646394989
@tikeyc `window.matchMedia("(pointer: coarse)").matches`的返回结果是否为`true`？
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plainheart commented on issue #12823:
URL:
https://github.com/apache/incubator-echarts/issues/12823#issuecomment-645986599
@tikeyc 麻烦您使用所拥有的触屏或大屏显示器帮助验证以下问题：
- `window.DocumentTouch && document instanceof DocumentTouch` 的结果是否为 `true`
- `window` 对象中是否有 `ontouchstart` 函数
通过[Stac
plainheart commented on issue #12823:
URL:
https://github.com/apache/incubator-echarts/issues/12823#issuecomment-645973348
>
但更新到echarts4.8.0版本.无法拖动的问题依然存在。只有去修改源码将touchEventsSupported的值强制设置成true后问题便得到了解决。
如果按照你说的将`touchEventsSupported`设置为`true`即可解决该问题，那么很有可能是在判断环境是否支持触摸事件的逻辑上存在bug
