关于'CALayer position contains NaN: [nan nan]'异常

异常

Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan nan]'

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

http://blog.csdn.net/sun2728/article/details/51925183

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