我怎样才能回溯到xcode 4中的第一个失败

Question

my apps crash to this part of code

int main(int argc, char *argv[]) {

@autoreleasepool {
    int retVal = UIApplicationMain(argc, argv, nil, nil);
    return retVal;
}
}

So, where in xcode 4 i can see list of things that the program did before he goes to this point, In clear I want a know at what line the program crash in my code?

Answer 1

If you're seeing that then it's highly likely your program has terminated due to an uncaught exception. Take a look at this question to see how to set a breakpoint in objc_exception_throw which will then help as you'll be dropped right into the code that's causing the exception to be thrown.

Answer 2

Did you enable Zombies? To do it do the following:

1) Click on your app name(next to the Run and Stop buttons on top)

2) Click "Edit Scheme..."

3) In "Memory Management" put a tick on "Enable Zombie Objects"

Or you can get there by clicking "Product" --> "Edit Scheme..."

Hope it helps