ios - A控制器跳转B控制器，B黑屏？

Question

1.storyBoard中有2个VC，分别套了导航。

2.AVC跳转BVC的方法，button连线的方法

- (IBAction)clickBtnToBvc:(id)sender {
    BViewController *vc = [[BViewController alloc]init];
    [self.navigationController pushViewController:vc animated:YES];
}

3.BVC黑屏，请问是什么原因？

Answer 1

你的B是在storyboard中创建的并绑定控件，所以要从storyboard加载

BViewController * vc = [[UIStoryboard storyboardWithName:@"storyboard" bundle:nil] instantiateViewControllerWithIdentifier:@"IDENTITY"];
[self.navigationController pushViewController:vc animated:YES];

Answer 2

尝试一下给BViewController的view设置一个背景颜色

Answer 3

把b的导航删掉