Troubleshoot Libc++abi.dylib:handler threw exception issues with iOS

Today encountered Libc++abi.dylib:handler threw exception problem, but on the real machine to run everything normal! At first it was not thought that the compiler cache of the Xib files would need to be removed from the emulator, At the same time, the code clean once , and then compile and run, and finally everything is normal.

The root cause of the problem is because there is a problem with the connection object of the control in the previous Xib, later modified, but the compiler does not recognize it, always do not handle the new xib, resulting in the simulator always error!

After encountering strange problems, you can use this method to determine the problem is not the environment, and then start looking in the code!