Ios_xcode How to accurately locate the error code that generated the exception

When an application occurs with an exception that causes a crash,

The cursor may simply indicate that the exception is present at the main function code , for example, as seen:

Such a case. Even if you read the log.

It may still not be clear which of the lines of code produced the exception in detail.

Therefore, you need to manually set Exception Breakpoint .

The debugger pauses the program's run at the moment the exception is thrown.

Position the program exactly to the line of code where the exception occurred.

What you see:

Exception breakpoint join steps such as the following:

Ios_xcode How to accurately locate the error code that generated the exception