问题出现的过程

点击一个按钮,页面都还没出现的的时候,直接就程序崩溃,并且断在了main.m中,并在控制台出现下面的错误提示内容:

2016-04-08 17:09:17.529 mxyc[262:12134] -[__NSCFNumber rangeOfCharacterFromSet:]: unrecognized selector sent to instance 0xb000000532432803
libc++abi.dylib: terminate_handler unexpectedly threw an exception

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