修复带有-webkit-overflow-scrolling: touch;的dom在修改z-index的时候偶现的闪屏现象
修复带有-webkit-overflow-scrolling: touch;的dom在修改z-index的时候偶现的闪屏现象
Merge pull request #7 from lin-chao/master

修复-webkit-overflow-scrolling: touch引起的闪屏现象