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@@ -0,0 +1,13 @@
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+ function getHeight(even, that) {
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+ return new Promise((resolve, reject) => {
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+ let windowHeight = 0;
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+ wx.getSystemInfo({
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+ success: (res => windowHeight = res.windowHeight)
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+ });
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+ let query = wx.createSelectorQuery().in(that).select(even).boundingClientRect();
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+ query.exec(res => (!res[0]) ? reject('没有查询到元素') : resolve((windowHeight - res[0].bottom) * 2))
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+ })
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+ }
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+ module.exports = {
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+ getHeight
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+ }
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