libc++abi.dylib: terminate_handler unexpectedly th

问题:

Randomly (that's why I ask the question), my application crashes when want to display data into textView.
The only error message I've got in my debug console is :

libc++abi.dylib: terminate_handler unexpectedly threw an exception

I Googled but can't get a clue to find how correct this and how this happens.

回答1:

Clean the project. Check each constraints and remove the corrupted one. Clean project again, it should works.

回答2:

I got the same error and a "clean" didn't resolve it.

It was caused by my internet testing flow, I check to see if WiFi is connected but not if that WiFi has an active internet connection that can resolve a supplied URL. It performs a dataWithContentsOfURL: that will ultimately fail. A similar thread made this suggestion to this question here by user Keith that helped me identify the problem -- which was to add breakpoints to C++ exceptions.

To enable -- click your breakpoints view and the very bottom click the '+' to add a breakpoint. Set it up as follows and the stack trance will be more meaningful.

回答3:

This can be caused by an outlet that is no longer existing (might have been renamed or removed).

Here is a tip on how to check outlets: Select the container view of the suspected outlet, pay attention to "!" marks in the connections inspector.

回答4:

I got this question ,because I set [self addObserver:self forKeyPath:@"_defaultAgType" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:nil];, but I did not remove it in dealloc. I solved this by [self removeObserver:self forKeyPath:@"_defaultAgType"]; in dealloc function.

回答5:

Another reason why it could happen is when you have a UI element declared but never added to the screen but still you try to do changes on them.

In my case I had a UIBarButtonItem declared in the code but I never added it to View. When I try to remove it without adding it, I had this issue.

回答6:

If you renamed/moved your view controller class, make sure you've checked Inherit Module From Target on Identity inspector for your scene on the storyboard