窗口缩放的时候，地图会不停的闪屏

[hzzcc]

maptalks's version and what browser you use?

v1.0.0

Issue description

在移动设备网页 ios 上缩放会闪烁，安卓上没有问题

Please provide a reproduction URL (on any jsfiddle like site)

[hzzcc]

这里有复现视频 @fuzhenn

-.Compressed.with.FlexClip.-.Compressed.with.FlexClip.mp4