Question

在旋转时推出新的UIView仍然存在问题。我正在效仿我发现的一个例子。它太疯狂了。它在此时输出错误，错误为;

'NSInvalidArgumentException'，原因：'应用程序尝试在目标上显示nil模态视图控制器。'

controller nvs = [self.storyboard instantiateViewControllerWithIdentifier:@"LandscapeView"];
[self.navigationController pushViewController:nvs animated:YES]

显然，我在这里遗漏了一些东西。我想要实现的是当用户旋转设备时将不同的视图推入堆栈。喜欢日历。

整个声明

LandscapeViewController * nvs;

- （void）updateLandscapeView { UIDeviceOrientation deviceOrientation = [UIDevice currentDevice] .orientation;

if (UIDeviceOrientationIsLandscape(deviceOrientation) && self.presentedViewController == nil)

{
    if (!self.landscapeViewController)
        //self.landscapeViewController = [[LandscapeViewController alloc] initWithNibName:@"LandscapeView" bundle:nil];

        //Set the location of the where you want the view to go i.e. the next view controller
        nvs = [self.storyboard instantiateViewControllerWithIdentifier:@"LandscapeView"];
        //Push the view onto the device
        [self.navigationController pushViewController:nvs animated:YES];

    if ([self respondsToSelector:@selector(presentViewController:animated:completion:)])
        [self presentViewController:self.landscapeViewController animated:YES completion:NULL];
    else
        [self presentModalViewController:self.landscapeViewController animated:YES];
}
else if (deviceOrientation == UIDeviceOrientationPortrait && self.presentedViewController != nil)
{
    if ([self respondsToSelector:@selector(dismissViewControllerAnimated:completion:)])
        [self dismissViewControllerAnimated:YES completion:NULL];
    else
        [self dismissModalViewControllerAnimated:YES];
}

}

提前致谢！杰里米

Answer 1

知道了。而不是pushViewController推送在语句外设置的nvs。我在使用self.landscapeViewController时直接引用它。

以下是代码。希望这可以帮助将来的某个人。

self.landscapeViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"LandscapeView"];
 [self.navigationController pushViewController:self.landscapeViewController animated:YES];

将故事板推送到新的UIView

1 个答案: