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微信for循环加载echarts ，tab 切换，展示不同状态下的折线图，ios 系统，切换几次之后，折线图消失

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微信for循环加载echarts ，tab 切换，展示不同状态下的折线图，ios 系统，切换几次之后，折线图消失

微信for循环加载echarts ，tab 切换，展示不同状态下的折线图，ios 系统，切换几次之后，折线图消失，有大佬碰到过吗


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  1. 每次切换时把echarts对象clear清除数据一下；
  2. 在每次setOption前，需要dispose消毁之前实例，处理内存溢出，可以处理一些其他问题；

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