iOS:使用全屏图像显示模态视图 Controller

Question

我想在点击缩略图时显示全屏图像。现在我正在展示一个模态视图 Controller ，但图像不在屏幕中央:

这是我在模态视图 Controller 中用来呈现 View Controller 的代码:

UIViewController *modalCon = [[UIViewController alloc] init];

modalCon.view.backgroundColor=[UIColor blackColor];
modalCon.view.userInteractionEnabled=YES;

UIImageView *imageView = [[UIImageView alloc] initWithFrame:modalCon.view.frame];
imageView.contentMode=UIViewContentModeScaleAspectFit;
imageView.image=coverImage.image;

[modalCon.view addSubview:imageView];

UITapGestureRecognizer *modalTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissModalView)];
[modalCon.view addGestureRecognizer:modalTap];

[self presentViewController:modalCon animated:YES completion:nil];

如何让这个图像在 View Controller 中居中？

Answer 1

你试过[image view setCenter:self.view.center]那一个根据屏幕居中，但如果你想以 modalCon 为中心，则将 self.view 替换为 modalCon.view