ios - 使用自定义动画呈现 ViewController

Question

我正在使用 foll 呈现一个 View Controller 。代码:

VC_B * b = [[VC_B alloc] init...];
[self presentViewController:b animated:YES completion:nil];

我正在尝试为 View Controller 的外观设置动画:传入的 VC 应该从覆盖当前显示的 VC 的顶部向下滑动。以下 this解决方案使它解决了一个问题:在传入的 VC 出现在屏幕上之前，当前的 VC 消失了。有办法解决这个问题吗？也许有另一种解决方案可以实现这种效果。

Answer 1

试试这段代码:

CreateNewViewController *newViewController = [[CreateNewViewController alloc]initWithNibName:@"CreateNewViewController" bundle:nil];

    CATransition *transition = [CATransition animation];
    transition.duration = 0.05;
    transition.timingFunction = [CAMediaTimingFunction      
    functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type =kCATransitionMoveIn;
    transition.subtype =kCATransitionFromTop;

    transition.delegate   = self;

    [self presentModalViewController:newViewController animated:NO];
    [self.view insertSubview:newViewController.view atIndex:0];

    [self.view.layer addAnimation:transition forKey:nil];

希望这对您有所帮助。