iOS - 具有透明度的presentViewController

Question

我想半透明地呈现一个视图控制器全屏幕,这样我仍然可以看到它下面的视图.以下代码显示了新的视图控制器,但它取代了当前的视图控制器.保持原始视图控制器可见的最佳方法是什么？新视图控制器的视图将具有半透明的黑色背景.

NewViewController* newVC = [[NSClassFromString(@"NewViewController") alloc] initWithNibName:deviceNib bundle:nil];
newVC.modalPresentationStyle = UIModalPresentationFullScreen;
newVC.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;


[self presentViewController:newVC animated:YES completion:NULL];

Answer 1

呈现半透明视图,而不是视图控制器.

mySemiTransparentView.alpha = 0.0f;
[self.view addSubview:mySemiTransparentView];

mySemiTransparentView是您的全屏视图.您可以将其设置为动画:

[UIView beginAnimations:@"fadeIn" context:nil];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDuration:0.4f];
mySemiTransparentView.alpha = 0.5f;
[UIView commitAnimations];