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*** Terminating app due to uncaught exception ‘NSUnknownKeyException‘, reason: ‘[<UIViewController 0x12b24d950> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key Builder.‘
*** First throw call stack:
(0x185c3c2d8 0x1974100e4 0x185c3bf5c 0x186a75480 0x185b67520 0x18aa9c7a0 0x18a998384 0x18a67ca28 0x18a67c994 0x18ad722fc 0x18a982148 0x18a99e3e4 0x18a9a0934 0x18a76a158 0x10008ecac 0x18a6b1404 0x18a69a4e0 0x18a6b0da0 0x18a6b0a2c 0x18a6a9f68 0x18a67d18c 0x18a91e324 0x18a67b6a0 0x185bf4240 0x185bf34e4 0x185bf1594 0x185b1d2d4 0x18f33b6fc 0x18a6e2fac 0x1000898f8 0x197a8ea08)
libc++abi.dylib: terminating with uncaught exception of type NSException
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原文地址：http://www.cnblogs.com/royi123/p/5480940.html
