相关疑难解决方法(0)

我有一个UIViewController视图作为另一个UIViewController视图顶部的子视图/模态,例如子视图/模态应该是透明的,并且任何添加到子视图的组件都应该是可见的.问题是我有子视图显示黑色背景而不是有clearColor.我试图制作UIView一个clearColor而不是黑色背景.有人知道它有什么问题吗？任何建议表示赞赏.

FirstViewController.m

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"SecondViewController"];

[vc setModalPresentationStyle:UIModalPresentationFullScreen];
[self presentModalViewController:vc animated:NO];  

SecondViewController.m

- (void)viewDidLoad 
{
     [super viewDidLoad];
     self.view.opaque = YES;
     self.view.backgroundColor = [UIColor clearColor];
}

决议:我解决了问题.它适用于iPhone和iPad.没有黑色背景的模态视图控制器只是clearColor/transparent.我需要改变的唯一一件事是我换成UIModalPresentationFullScreen了UIModalPresentationCurrentContext.这有多简单啊!

FirstViewController.m

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"SecondViewController"];
vc.view.backgroundColor = [UIColor clearColor];
self.modalPresentationStyle = UIModalPresentationCurrentContext;
[self presentViewController:vc animated:NO completion:nil];

注意:如果您使用以下modalPresentationStyle财产navigationController:

FirstViewController.m

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]; …