ios - 使用淡入动画呈现模态视图

Question

我模态地呈现了一个登录屏幕，如下所示。如果我不对，请纠正我。

   UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
   UIViewController *ivc = [storyboard instantiateViewControllerWithIdentifier:@"login"];//LOOK AT NEXT LINE
   [self presentViewController:ivc animated:YES completion:nil];

确实出现了登录屏幕，但动画是向上滑动的。我更喜欢淡入淡出我们的动画。我该怎么做？

Answer 1

只需为 viewController 设置 modalTransitionStyle 属性。 ( Documentation )

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
UIViewController *ivc = [storyboard instantiateViewControllerWithIdentifier:@"login"];
[ivc setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];
[self presentViewController:ivc animated:YES completion:nil];

在 Swift 中:

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier: "login")
viewController.modalTransitionStyle = .crossDissolve
present(viewController, animated: true, completion: nil)