Question

当我使用exc_bad_access

时，我收到了错误dismissviewcontrolleranimated

presentViewController代码为：

TestViewController *testViewController=[[TestViewController alloc] init];
UINavigationController *nav=[[UINavigationController alloc] initWithRootViewController:testViewController];
[self presentViewController:nav animated:YES completion:^{
    NSLog(@"presentViewController is finish");
}];

但是，当我删除UINavigationController时，错误就会消失。

像这样：

TestViewController *testViewController=[[TestViewController alloc] init];
[self presentViewController:testViewController animated:YES completion:^{
    NSLog(@"presentViewController is finish");
}];

感谢您的帮助。

Answer 1

UINavigationController有推送和拉动转换，您正尝试将Modal Transition应用于它。

Answer 2

现在的视图控制器通过“根视图控制器”呈现，而不是UINavigationController。您应该像这样

从Parent VC或Base VC中展示您的VC

TestViewController *testViewController=[self.storyboard instantiateViewControllerWithIdentifier:@"storyboardIDofViewController"];//set the storyboard ID of the TestViewController in your storyboard by selecting attribute inspector after selecting the view controller.
    [self presentViewController:testViewController animated:YES completion:^{
    NSLog(@"presentViewController is finish");
}];

这是从另一个VC呈现VC的正确方法。

当我使用dismissviewcontrolleranimated时，我得到了exc_bad_access

2 个答案: