尝试从视图控制器中解除

Question

我有两个班，在头等舱

- (IBAction)Login:(id)sender {
 SampleViewController2 *sampleView = [[[SampleViewController2 alloc] init];
   [self presentModalViewController:sampleView animated:YES];
}

在第二课..

- (IBAction)Logout:(id)sender {
  [self dismissModalViewControllerAnimated:YES];
}

它说警告尝试从视图控制器中解除..这里有什么问题..

Answer 1

添加：

 if (![[self modalViewController] isBeingDismissed])
        [self dismissModalViewControllerAnimated:YES];

做一个简单的谷歌搜索，你说的问题很常见......

Answer 2

如果当前视图的模态视图被解除，您可以在解雇之前检查它

if (![[self modalViewController] isBeingDismissed]){
        [self dismissModalViewControllerAnimated:YES];
}