最近越来越多的应用程序正在使用新型视图之间的过渡。很难定义它，但过渡看起来像预览视图正在淡出，变低（向下平移）并缩小一点 - 所有这些都是同时发生的。它真的很微妙和优雅。
您可以在 Facebook 应用程序中以慢动作观察这种过渡 - 在墙上找到某人的照片，点击查看它，然后将全屏图像慢慢向下拖动，您会注意到墙壁从后面升起 - 褪色和缩放一点. 这就是过渡。过渡还涉及状态栏淡出。
当您从左窗格打开设置时，此转换也出现在 Gmail 2.0 中。
我认为有一个特定的框架或准备好的方法，因为越来越多的应用程序实现了这个。但也许我也错了，因为我在过渡的轨迹中看到了一些应用程序的一些细微差别——例如。Gmail 使用了一点轮播效果，但 facebook 只是缩小到中间。
无论如何，这似乎是一种新趋势。
我正在寻找一些参考或框架或实现这种转换的诀窍。
感谢您提供任何有用的东西。
试试这个链接。我认为这正是你正在寻找的东西https://github.com/kentnguyen/KNSemiModalViewController
我第一次看到它在国家地理应用程序中使用...尝试使用这两种方法，第一种“将其放回”，第二种“将其带回”。过去它对我来说效果很好，只需进行一些调整以满足您的需求。
- (void)dropItBack:(id)sender
{
// Position
CABasicAnimation *posAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
posAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(160, 284)];//center point
// Opacity
CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
opacityAnimation.toValue = [NSNumber numberWithFloat:0.5f];
CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
scaleAnimation.toValue = [NSNumber numberWithDouble:0.8];
// Dramaticism of the Z rotation
// A lower number is more dramatic
float distance = 1000;
CATransform3D trans = CATransform3DIdentity;
trans.m34 = 1.f / -distance;
// Rotate Back
CABasicAnimation *rockBack = [CABasicAnimation animationWithKeyPath:@"transform"];
rockBack.toValue = [NSValue valueWithCATransform3D:CATransform3DRotate(trans, M_PI_4, 1.f, 0.f, 0.f)];
rockBack.beginTime = 0.f;
// Rotate forward
trans.m34 = 0.f;
CABasicAnimation *rockForward = [CABasicAnimation animationWithKeyPath:@"transform"];
rockForward.toValue = [NSValue valueWithCATransform3D:CATransform3DRotate(trans, M_PI_4, -1.f, 0.f, 0.f)];
rockForward.beginTime = 0.25f;
CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
animationGroup.duration = 0.5f;
animationGroup.repeatCount = 0.f;
animationGroup.removedOnCompletion = NO;
animationGroup.autoreverses = NO;
animationGroup.fillMode = kCAFillModeForwards;
animationGroup.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[animationGroup setAnimations:[NSArray arrayWithObjects:rockBack, rockForward, scaleAnimation, posAnimation, opacityAnimation, nil]];
[self.navigationController.view.layer addAnimation:animationGroup forKey:nil];
popsheet = [UIButton buttonWithType:UIButtonTypeCustom];
[popsheet setBackgroundColor:[UIColor blueColor]];
[popsheet setFrame:CGRectMake(0, 580, 320, 400)];
[popsheet addTarget:self action:@selector(bringItForward:) forControlEvents:UIControlEventTouchUpInside];
[self.tabBarController.view addSubview:popsheet];
[UIView animateWithDuration:0.3 animations:^{
[popsheet setFrame: CGRectMake(0, 180, 320, 400)];
}];
}
- (void)bringItForward:(id)sender
{
// Position
CABasicAnimation *posAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
posAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(160, 284)];
// Opacity
CABasicAnimation *opacityAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
opacityAnimation.toValue = [NSNumber numberWithFloat:1.f];
// Scale
CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
scaleAnimation.toValue = [NSNumber numberWithDouble:1.f];
// Dramaticism of the Z rotation
// A lower number is more dramatic
float distance = 1000;
CATransform3D trans = CATransform3DIdentity;
trans.m34 = 1.f / distance;
// Rotate back
CABasicAnimation *rockBack = [CABasicAnimation animationWithKeyPath:@"transform"];
rockBack.toValue = [NSValue valueWithCATransform3D:CATransform3DRotate(trans, M_PI_4, 1.f, 0.f, 0.f)];
rockBack.beginTime = 0.f;
// Rotate forward
trans.m34 = 0.f;
CABasicAnimation *rockForward = [CABasicAnimation animationWithKeyPath:@"transform"];
rockForward.toValue = [NSValue valueWithCATransform3D:CATransform3DRotate(trans, M_PI_4, -1.f, 0.f, 0.f)];
rockForward.beginTime = 0.25f;
CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
animationGroup.duration = 0.5f;
animationGroup.repeatCount = 0.f;
animationGroup.removedOnCompletion = NO;
animationGroup.autoreverses = NO;
animationGroup.fillMode = kCAFillModeForwards;
animationGroup.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[animationGroup setAnimations:[NSArray arrayWithObjects:posAnimation, rockBack, rockForward, opacityAnimation, nil]];
[self.navigationController.view.layer addAnimation:animationGroup forKey:nil];
[UIView animateWithDuration:0.3 animations:^{
[popsheet setFrame: CGRectMake(0, 580, 320, 400)];
}];
}