iOS - 关于'CALayer position contains NaN: [nan nan]'异常
异常Terminatingappduetouncaughtexception'CALayerInvalidGeometry',reason:'CALayerpositioncontainsNaN:[nannan]'原因计算高度,宽度,CGRectMake设置等中存在错误,看看是不是除0等操作了摘自:https://blog.csdn.net/wujiabin468/article/details/