如何在iPhone中使用presentViewController时保持背景透明？

Question

I want to keep background transparent like UIActivityController in iPhone iOS6

I try to clear color and opaque but background always black like this (iPhone iOS5 simulator)

This is presentViewController code:

    ShareViewController *controller = [[ShareViewController alloc] initWithNibName:@"ShareViewController_iPhone" bundle:nil];
    controller.delegate = self;

    [self presentViewController:controller animated:YES completion:^{
        NSLog(@"Activity complete");
    }];

Please help! Thanks!

Answer 1

See what you have to do is add a UIView behind the custom UIActionsheet you mentioned. Here what you can do is keep the Background-color of the UIView as white and then keep its alpha = 0.5.

When you dismiss the UIActionsheet you can removeFromSuperview the UIView added behind too.

Answer 2

Instead of presentViewController use [UIView transitionWithView] to define your custom animation.

• Start by having your view controller retained somewhere. (If you are using ARC have it as property on the parent view controller).

• Add the view controller's view as a subview to the current VC's view. Set the frame to be CGRectMake(0, screenBottom, screenWidth, screenHeight / 2);

• Animate by changing the frame so that it slides onto the screen.

   [UIView transitionWithView:<#(UIView *)view#> duration:0.5 options:nil animations:^ { view.frame = CGRectMake(0, screenHeight / 2, screenWidth, screenHeight/ 2); } completion:nil];