lime-painter ios 兼容问题

lime-painter： https://gitee.com/liangei/lime-painter
lime-painter 版本1.6.2 海报画版ios不完整问题，ios不完整，安卓显示正常，l-painter只需要加上宽高，保证宽高与海报宽高一致即可。
如：海报为width: '750rpx'；height: '1114rpx'；
<l-painter custom-style="position: fixed;z-index: -1;top: -200vh;left: -200vw;" :board="posterData" isRenderImage @success="posterSuccess" />
改为：
<l-painter custom-style="position: fixed;z-index: -1;top: -200vh;left: -200vw;width: 750rpx;height: 1114rpx;" :board="posterData" isRenderImage @success="posterSuccess" />