移动端fixed定位按钮在底部，键盘弹起，不让底部按钮顶上去

//检测浏览器的resize事件，当按钮高度过小时就可以判定为出现这种情况，这时把按钮直接隐藏掉之类的
<button v-show=”isOriginHei”></button>
data(){
return{
isOriginHei: true,
screenHeight: window.innnerHeight || document.documentElement.clientHeight || document.body.clientHeight,
originHeight: window.innnerHeight || document.documentElement.clientHeight || document.body.clientHeight
}
}

watch: {
screenHeight(val){
If(this.isOriginHei > val + 100){
this.isOriginHei = false;
} else{
this.isOriginHei = true;
}
}
},
mounted(){
let self = this;
window.onresize = function(){
return (
function(){
self.screenHeight=window.innnerHeight || document.documentElement.clientHeight || document.body.clientHeight
}
)()
}
}