如何设置动画/变形菜单按钮,如Facebook Paper应用程序

Question

我在Facebook Paper应用程序中看到了这个动画/变形,当你点击它时,它们会将菜单按钮变形为X,然后返回X. 我记录它是因为我不知道如何以任何其他方式显示它.

https://www.youtube.com/watch?v=y6j_mVgv-NM

有人可以向我解释这是如何完成的吗？我想为我的应用程序.

Answer 1

那太棒了,之前没见过.

创建了一个快速的要点:

https://gist.github.com/mnmaraes/9458421

编辑:所以它不仅仅是一个链接,关键概念是两种方法:

-(void)morphToX
{
    CGFloat angle = M_PI_4;
    CGPoint center = CGPointMake(120., 120.);

    __weak TUIViewController *weakSelf = self;
    [UIView animateWithDuration:0.8 delay:0.0 usingSpringWithDamping:0.6 initialSpringVelocity:2.0 options:UIViewAnimationOptionCurveEaseOut animations:^{
        TUIViewController *strongSelf = weakSelf;

        strongSelf.topLineView.transform = CGAffineTransformMakeRotation(-angle*5);
        strongSelf.topLineView.center = center;

        strongSelf.bottomLineView.transform = CGAffineTransformMakeRotation(angle*5);
        strongSelf.bottomLineView.center = center;

        strongSelf.centerLineView.transform = CGAffineTransformMakeScale(0., 1.0);

    } completion:^(BOOL finished) {

    }];
}

和:

-(void)morphToLine
{

    __weak TUIViewController *weakSelf = self;
    [UIView animateWithDuration:0.8 delay:0.0 usingSpringWithDamping:0.6 initialSpringVelocity:2.0 options:UIViewAnimationOptionCurveEaseOut animations:^{
        TUIViewController *strongSelf = weakSelf;

        strongSelf.topLineView.transform = CGAffineTransformIdentity;
        strongSelf.topLineView.center = CGPointMake(120., 2.);

        strongSelf.bottomLineView.transform = CGAffineTransformIdentity;
        strongSelf.bottomLineView.center = CGPointMake(120., 238.);

        strongSelf.centerLineView.transform = CGAffineTransformIdentity;

    } completion:^(BOOL finished) {

    }];
}

第一个从平行线动画到X,第二个从X到线.玩动画的数字和选项应该给你不同的感觉.

玩得开心!