2015-07-28 16:34:24.374 ezplug[1532:602143]-[__nscfnumber length]: Unrecognized selector sent to instance 0xb0000000000000222015-07-28 16:34:37.367 ezplug[1532:602143] * * * terminating app due to uncaught exception ' Nsinvalidargumentexception ', Reason: '-[__nscfnumber length]: Unrecognized selector sent to instance 0xb000000000000022 ' * * * First throw Call stack: (0x1823a82d8 0x1940240e4 0x1823af3a4 0x1823ac154 0x1822aeccc 0x186e29d98 0x1001618fc 0x100160 C44 0x10015d20c 0x10015a178 0x100166188 0x1001052bc 0x100104698 0x10019e7c4 0x100135570 0x100500fd4 0x100500f94 0x100505c28 0x18235f7f8 0x18235d8a0 0x1822892d4 0x18bce76fc 0x186e86f40 0x1001f0bc8 0x1946cea08) Libc++abi.dylib: Terminating with uncaught exception of type NSException This error occurs because when you call a NSString object that has the length method, you pass him a nsnumber pair of images. You can do this by setting a break on exceptions and then finding where the length method is called. How to Device exception breakpoint, my first two articles have detailed introduction, here is not much to receive.
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[__nscfnumber length]: Unrecognized selector sent to instance 0xb000000000000022
