IOS common exception exec_bad_access Solution

During iOS development, exec_bad_access is frequently encountered, resulting inProgramThis problem is generally caused by the early release object and then the message sent to the object. You can set the nszombieenabled variable in xcode to obtain detailed information.

What we did before xcode 4 was:

1. On the xcode interface, double-click the executable file in executables to bring up a Setting dialog box.

2. Add the "nszombieenabled" name in the lower part of the arguments option "variables to be set in the Environment". The value is set to "yes ".

3. debug the problematic program again to obtain useful information.

The procedure after xcode 4 is as follows:
Choose product> editscheme> RUN> environment variables from the menu, add nszombieenabled, and set the value to yes,
The detailed settings are as follows: