_BSMachError: (os/kern) invalid capability (20) _BSMachError: (os/kern) invalid name (15) 问题的解决

　　在项目中突然遇到一个问题,也就是_BSMachError: (os/kern) invalid capability (20) _BSMachError: (os/kern) invalid name (15)

　　虽然该问题对界面展示以及数据保存都没有影响,但是处于本人对于提示错误的洁癖,对于该问题进行了调研.

　　错误出现的情景:

- (void)showAlterView {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@"是否确定放弃本次编辑" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *_Nonnull action) {
}];

UIAlertAction *otherAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[self.navigationController popViewControllerAnimated:YES];
}];
[alertController addAction:cancelAction];
[alertController addAction:otherAction];
[self presentViewController:alertController animated:YES completion:nil];
}

点击确定后返回上一个控制器时会出现这个错误

　　解决办法:

- (void)showAlterView {

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@"是否确定放弃本次编辑" preferredStyle:UIAlertControllerStyleAlert];

UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *_Nonnull action) {

}];

UIAlertAction *otherAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

dispatch_async(dispatch_get_main_queue(), ^{

self.introduceTextView.delegate = nil;

[[NSNotificationCenter defaultCenter] removeObserver:self.introduceTextView];

[self.navigationController popViewControllerAnimated:YES];

});

}];

[alertController addAction:cancelAction];

[alertController addAction:otherAction];

[self presentViewController:alertController animated:YES completion:nil];

}

即将alterAction事件放到主线程中去执行.

ps:本人由于精力和时间有限,并没有对该问题进行深入研究,希望同行大神有什么理解还有深入研究,可以告知小女,小女在此谢过各位大牛.