10

レイヤー機能のみを使用して、2つのUIViewで一種の折り紙トランジションを実現しようとしています。アイデアは、遠近効果で2つのビューを折りたたむことです。両方のビューにはパースペクティブがあり、遷移は各ビューの回転と、このビューがもう一方のビューにアタッチされているように見えるように一方のビューの平行移動によって定義されます。

問題は、トランジションの途中でビューが互いにオーバーラップすることです。この重複を視覚的に回避するためにzPositionを使用したくありません。これらの2つのビューが、共有側によって結合されているかのように機能するようにしたいのです。トランジションのコードは次のとおりです。

何かアイデア、または他の解決策はありますか?

移行中の重複するビュー

- (void)animateWithPerspective
{
    CGFloat rotationAngle = 90;
    CATransform3D transform = CATransform3DIdentity;
    UIView *topView;
    UIView *bottomView;
    UIView *mainView;
    CGRect frame;
    CGFloat size = 200;

    mainView = [[UIView alloc] initWithFrame:CGRectMake(10,10, size, size*2)];
    [self.view addSubview:mainView];
    bottomView = [[UIView alloc] initWithFrame:CGRectZero];
    bottomView.layer.anchorPoint = CGPointMake(0.5, 1);
    bottomView.frame = CGRectMake(0, size, size, size);
    bottomView.backgroundColor = [UIColor blueColor];
    [mainView addSubview:bottomView];

    topView = [[UIView alloc] initWithFrame:CGRectZero];
    topView.layer.anchorPoint = CGPointMake(0.5, 0);
    topView.frame = CGRectMake(0, 0, size, size);
    topView.backgroundColor = [UIColor redColor];
    [mainView addSubview:topView];

    transform.m34 = 1.0/700.0;
    topView.layer.transform = transform;
    bottomView.layer.transform = transform;

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:2];
    [UIView setAnimationRepeatAutoreverses:YES];
    [UIView setAnimationRepeatCount:INFINITY];
    [UIView setAnimationCurve:UIViewAnimationCurveLinear];
    frame = bottomView.frame;
    frame.origin.y = bottomView.frame.origin.y - bottomView.frame.size.height - topView.frame.size.height;
    bottomView.frame = frame;
    topView.layer.transform = CATransform3DRotate(transform, rotationAngle * M_PI/180, 1, 0, 0);
    bottomView.layer.transform = CATransform3DRotate(transform, -rotationAngle * M_PI/180, 1, 0, 0);
    [UIView commitAnimations];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self animate];
}

問題を単純化するために、遠近法の変換を取り除きましょう。同じ種類の問題があるより単純なコードを次に示します。

- (void)animateWithoutPerspective
{
    CGFloat rotationAngle = 90;
    UIView *topView;
    UIView *bottomView;
    UIView *mainView;
    CGRect frame;
    CGFloat size = 200;

    mainView = [[UIView alloc] initWithFrame:CGRectMake(10,10, size, size*2)];
    [self.view addSubview:mainView];
    bottomView = [[UIView alloc] initWithFrame:CGRectMake(0, size, size, size)];
    bottomView.backgroundColor = [UIColor blueColor];
    [mainView addSubview:bottomView];

    topView = [[UIView alloc] initWithFrame:CGRectZero];
    topView.layer.anchorPoint = CGPointMake(0.5, 0);
    topView.frame = CGRectMake(10, 0, size-20, size);
    topView.backgroundColor = [UIColor redColor];
    [mainView addSubview:topView];

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:2];
    [UIView setAnimationRepeatAutoreverses:YES];
    [UIView setAnimationRepeatCount:INFINITY];
    [UIView setAnimationCurve:UIViewAnimationCurveLinear];
    frame = bottomView.frame;
    frame.origin.y = bottomView.frame.origin.y - bottomView.frame.size.height;
    bottomView.frame = frame;
    topView.layer.transform = CATransform3DMakeRotation(rotationAngle * M_PI/180, 1, 0, 0);
    [UIView commitAnimations];
}
4

5 に答える 5

22

最後に、単純なシャドウが追加された3スリーブアニメーションのソリューションを次に示します。この種のアニメーションを解決するための鍵は、いくつかの適切に編成されたサブレイヤーといくつかのサブレイヤーを使用することCATransformLayerです。

- (void)animate
{
    CATransform3D transform = CATransform3DIdentity;
    CALayer *topSleeve;
    CALayer *middleSleeve;
    CALayer *bottomSleeve;
    CALayer *topShadow;
    CALayer *middleShadow;
    UIView *mainView;
    CGFloat width = 300;
    CGFloat height = 150;
    CALayer *firstJointLayer;
    CALayer *secondJointLayer;
    CALayer *perspectiveLayer;

    mainView = [[UIView alloc] initWithFrame:CGRectMake(50, 50, width, height*3)];
    mainView.backgroundColor = [UIColor yellowColor];
    [self.view addSubview:mainView];

    perspectiveLayer = [CALayer layer];
    perspectiveLayer.frame = CGRectMake(0, 0, width, height*2);
    [mainView.layer addSublayer:perspectiveLayer];

    firstJointLayer = [CATransformLayer layer];
    firstJointLayer.frame = mainView.bounds;
    [perspectiveLayer addSublayer:firstJointLayer];

    topSleeve = [CALayer layer];
    topSleeve.frame = CGRectMake(0, 0, width, height);
    topSleeve.anchorPoint = CGPointMake(0.5, 0);
    topSleeve.backgroundColor = [UIColor redColor].CGColor;
    topSleeve.position = CGPointMake(width/2, 0);
    [firstJointLayer addSublayer:topSleeve];
    topSleeve.masksToBounds = YES;

    secondJointLayer = [CATransformLayer layer];
    secondJointLayer.frame = mainView.bounds;
    secondJointLayer.frame = CGRectMake(0, 0, width, height*2);
    secondJointLayer.anchorPoint = CGPointMake(0.5, 0);
    secondJointLayer.position = CGPointMake(width/2, height);
    [firstJointLayer addSublayer:secondJointLayer];

    middleSleeve = [CALayer layer];
    middleSleeve.frame = CGRectMake(0, 0, width, height);
    middleSleeve.anchorPoint = CGPointMake(0.5, 0);
    middleSleeve.backgroundColor = [UIColor blueColor].CGColor;
    middleSleeve.position = CGPointMake(width/2, 0);
    [secondJointLayer addSublayer:middleSleeve];
    middleSleeve.masksToBounds = YES;

    bottomSleeve = [CALayer layer];
    bottomSleeve.frame = CGRectMake(0, height, width, height);
    bottomSleeve.anchorPoint = CGPointMake(0.5, 0);
    bottomSleeve.backgroundColor = [UIColor grayColor].CGColor;
    bottomSleeve.position = CGPointMake(width/2, height);
    [secondJointLayer addSublayer:bottomSleeve];

    firstJointLayer.anchorPoint = CGPointMake(0.5, 0);
    firstJointLayer.position = CGPointMake(width/2, 0);

    topShadow = [CALayer layer];
    [topSleeve addSublayer:topShadow];
    topShadow.frame = topSleeve.bounds;
    topShadow.backgroundColor = [UIColor blackColor].CGColor;
    topShadow.opacity = 0;

    middleShadow = [CALayer layer];
    [middleSleeve addSublayer:middleShadow];
    middleShadow.frame = middleSleeve.bounds;
    middleShadow.backgroundColor = [UIColor blackColor].CGColor;
    middleShadow.opacity = 0;

    transform.m34 = -1.0/700.0;
    perspectiveLayer.sublayerTransform = transform;

    CABasicAnimation* animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];
    [animation setDuration:2];
    [animation setAutoreverses:YES];
    [animation setRepeatCount:INFINITY];
    [animation setFromValue:[NSNumber numberWithDouble:0]];
    [animation setToValue:[NSNumber numberWithDouble:-90*M_PI/180]];
    [firstJointLayer addAnimation:animation forKey:nil];

    animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];
    [animation setDuration:2];
    [animation setAutoreverses:YES];
    [animation setRepeatCount:INFINITY];
    [animation setFromValue:[NSNumber numberWithDouble:0]];
    [animation setToValue:[NSNumber numberWithDouble:180*M_PI/180]];
    [secondJointLayer addAnimation:animation forKey:nil];

    animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];
    [animation setDuration:2];
    [animation setAutoreverses:YES];
    [animation setRepeatCount:INFINITY];
    [animation setFromValue:[NSNumber numberWithDouble:0]];
    [animation setToValue:[NSNumber numberWithDouble:-90*M_PI/180]];
    [bottomSleeve addAnimation:animation forKey:nil];

    animation = [CABasicAnimation animationWithKeyPath:@"bounds.size.height"];
    [animation setDuration:2];
    [animation setAutoreverses:YES];
    [animation setRepeatCount:INFINITY];
    [animation setFromValue:[NSNumber numberWithDouble:perspectiveLayer.bounds.size.height]];
    [animation setToValue:[NSNumber numberWithDouble:0]];
    [perspectiveLayer addAnimation:animation forKey:nil];

    animation = [CABasicAnimation animationWithKeyPath:@"position.y"];
    [animation setDuration:2];
    [animation setAutoreverses:YES];
    [animation setRepeatCount:INFINITY];
    [animation setFromValue:[NSNumber numberWithDouble:perspectiveLayer.position.y]];
    [animation setToValue:[NSNumber numberWithDouble:0]];
    [perspectiveLayer addAnimation:animation forKey:nil];

    animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
    [animation setDuration:2];
    [animation setAutoreverses:YES];
    [animation setRepeatCount:INFINITY];
    [animation setFromValue:[NSNumber numberWithDouble:0]];
    [animation setToValue:[NSNumber numberWithDouble:0.5]];
    [topShadow addAnimation:animation forKey:nil];

    animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
    [animation setDuration:2];
    [animation setAutoreverses:YES];
    [animation setRepeatCount:INFINITY];
    [animation setFromValue:[NSNumber numberWithDouble:0]];
    [animation setToValue:[NSNumber numberWithDouble:0.5]];
    [middleShadow addAnimation:animation forKey:nil];
}
于 2011-04-04T14:03:43.960 に答える
4

フィルの答えのスウィフトバージョン

func animate() {
    var transform:CATransform3D = CATransform3DIdentity;
    var topSleeve:CALayer
    var middleSleeve:CALayer
    var bottomSleeve:CALayer
    var topShadow:CALayer
    var middleShadow:CALayer
    var mainView:UIView
    var width:CGFloat = 300
    var height:CGFloat = 150
    var firstJointLayer:CALayer
    var secondJointLayer:CALayer
    var perspectiveLayer:CALayer

    mainView = UIView(frame:CGRectMake(50, 50, width, height*3))
    mainView.backgroundColor = UIColor.yellowColor()
    view.addSubview(mainView)

    perspectiveLayer = CALayer()
    perspectiveLayer.frame = CGRectMake(0, 0, width, height*2)
    mainView.layer.addSublayer(perspectiveLayer)

    firstJointLayer = CATransformLayer()
    firstJointLayer.frame = mainView.bounds;
    perspectiveLayer.addSublayer(firstJointLayer)

    topSleeve = CALayer()
    topSleeve.frame = CGRectMake(0, 0, width, height);
    topSleeve.anchorPoint = CGPointMake(0.5, 0)
    topSleeve.backgroundColor = UIColor.redColor().CGColor;
    topSleeve.position = CGPointMake(width/2, 0)
    firstJointLayer.addSublayer(topSleeve)
    topSleeve.masksToBounds = true

    secondJointLayer = CATransformLayer()
    secondJointLayer.frame = mainView.bounds;
    secondJointLayer.frame = CGRectMake(0, 0, width, height*2)
    secondJointLayer.anchorPoint = CGPointMake(0.5, 0)
    secondJointLayer.position = CGPointMake(width/2, height)
    firstJointLayer.addSublayer(secondJointLayer)

    middleSleeve = CALayer()
    middleSleeve.frame = CGRectMake(0, 0, width, height);
    middleSleeve.anchorPoint = CGPointMake(0.5, 0)
    middleSleeve.backgroundColor = UIColor.blueColor().CGColor
    middleSleeve.position = CGPointMake(width/2, 0)
    secondJointLayer.addSublayer(middleSleeve)
    middleSleeve.masksToBounds = true

    bottomSleeve = CALayer()
    bottomSleeve.frame = CGRectMake(0, height, width, height)
    bottomSleeve.anchorPoint = CGPointMake(0.5, 0)
    bottomSleeve.backgroundColor = UIColor.grayColor().CGColor
    bottomSleeve.position = CGPointMake(width/2, height)
    secondJointLayer.addSublayer(bottomSleeve)

    firstJointLayer.anchorPoint = CGPointMake(0.5, 0)
    firstJointLayer.position = CGPointMake(width/2, 0)

    topShadow = CALayer()
    topSleeve.addSublayer(topShadow)
    topShadow.frame = topSleeve.bounds
    topShadow.backgroundColor = UIColor.blackColor().CGColor
    topShadow.opacity = 0

    middleShadow = CALayer()
    middleSleeve.addSublayer(middleShadow)
    middleShadow.frame = middleSleeve.bounds
    middleShadow.backgroundColor = UIColor.blackColor().CGColor
    middleShadow.opacity = 0

    transform.m34 = -1/700
    perspectiveLayer.sublayerTransform = transform;

    var animation = CABasicAnimation(keyPath: "transform.rotation.x")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = -90*M_PI/180
    firstJointLayer.addAnimation(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "transform.rotation.x")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = 180*M_PI/180
    secondJointLayer.addAnimation(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "transform.rotation.x")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = -90*M_PI/180
    bottomSleeve.addAnimation(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "bounds.size.height")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = perspectiveLayer.bounds.size.height
    animation.toValue = 0
    perspectiveLayer.addAnimation(animation, forKey: nil)


    animation = CABasicAnimation(keyPath: "position.y")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = perspectiveLayer.position.y
    animation.toValue = 0
    perspectiveLayer.addAnimation(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "opacity")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = 0.5
    topShadow.addAnimation(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "opacity")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = 0.5
    middleShadow.addAnimation(animation, forKey: nil)
}
于 2015-08-25T10:00:41.247 に答える
1

最初は、Y位置の線形変換は回転の線形変換を意味しないと思いましたが、そうであるようです。

エラーは非常に単純で、遠近法の値が間違っています。遠近法は、Z軸上に負の距離で天文台を配置することによってモデル化されます。次に、パースペクティブ値を否定する必要があります。

transform.m34 = 1.0/(-700.0);

そして、それは期待どおりに機能します。

念のために言っておきますが、変換は角度に対して線形ではありません。ただし、アーティファクトはzbufferによって隠されています。

中間パスでは、角度は60度になりますが、線形アニメーションでは45度になります。しかし、右側から見て、負のZ軸の位置から見ると、バッファは平面の交差を非表示にします。

于 2011-04-03T00:42:47.720 に答える
1

答えを説明するため。

すべてのアニメーションと透視投影(perspectiveLayer.sublayerTransformそのCATransformLayerサブレイヤー上)を配置しませんでした。投影行列m34フィールド値を試して、消失点にどのように影響するかを確認してください。

レイヤーのスタック

于 2016-03-10T10:08:59.720 に答える
1

Swift 4の更新された回答:

Vojtecの回答の更新バージョン。

    func animate() {
    var transform:CATransform3D = CATransform3DIdentity;
    var topSleeve:CALayer
    var middleSleeve:CALayer
    var bottomSleeve:CALayer
    var topShadow:CALayer
    var middleShadow:CALayer
    var mainView:UIView
    let width:CGFloat = 300
    let height:CGFloat = 150
    var firstJointLayer:CALayer
    var secondJointLayer:CALayer
    var perspectiveLayer:CALayer

    mainView = UIView(frame:CGRect(x: 50, y: 50, width: width, height: height*3))
    mainView.backgroundColor = UIColor.yellow
    view.addSubview(mainView)

    perspectiveLayer = CALayer()
    perspectiveLayer.frame = CGRect(x: 0, y: 0, width: width, height: height*2)
    mainView.layer.addSublayer(perspectiveLayer)

    firstJointLayer = CATransformLayer()
    firstJointLayer.frame = mainView.bounds;
    perspectiveLayer.addSublayer(firstJointLayer)

    topSleeve = CALayer()
    topSleeve.frame = CGRect(x: 0, y: 0, width: width, height: height)
    topSleeve.anchorPoint = CGPoint(x: 0.5, y: 0)
    topSleeve.backgroundColor = UIColor.red.cgColor
    topSleeve.position = CGPoint(x: width/2, y: 0)
    firstJointLayer.addSublayer(topSleeve)
    topSleeve.masksToBounds = true

    secondJointLayer = CATransformLayer()
    secondJointLayer.frame = mainView.bounds;
    secondJointLayer.frame = CGRect(x: 0, y: 0, width: width, height: height*2)
    secondJointLayer.anchorPoint = CGPoint(x: 0.5, y: 0)
    secondJointLayer.position = CGPoint(x: width/2, y: height)
    firstJointLayer.addSublayer(secondJointLayer)

    middleSleeve = CALayer()
    middleSleeve.frame = CGRect(x: 0, y: 0, width: width, height: height);
    middleSleeve.anchorPoint = CGPoint(x: 0.5, y: 0)
    middleSleeve.backgroundColor = UIColor.blue.cgColor
    middleSleeve.position = CGPoint(x: width/2, y: 0)
    secondJointLayer.addSublayer(middleSleeve)
    middleSleeve.masksToBounds = true

    bottomSleeve = CALayer()
    bottomSleeve.frame = CGRect(x: 0, y: height, width: width, height: height)
    bottomSleeve.anchorPoint = CGPoint(x: 0.5, y: 0)
    bottomSleeve.backgroundColor = UIColor.gray.cgColor
    bottomSleeve.position = CGPoint(x: width/2, y: height)
    secondJointLayer.addSublayer(bottomSleeve)

    firstJointLayer.anchorPoint = CGPoint(x: 0.5, y: 0)
    firstJointLayer.position = CGPoint(x: width/2, y: 0)

    topShadow = CALayer()
    topSleeve.addSublayer(topShadow)
    topShadow.frame = topSleeve.bounds
    topShadow.backgroundColor = UIColor.black.cgColor
    topShadow.opacity = 0

    middleShadow = CALayer()
    middleSleeve.addSublayer(middleShadow)
    middleShadow.frame = middleSleeve.bounds
    middleShadow.backgroundColor = UIColor.black.cgColor
    middleShadow.opacity = 0

    transform.m34 = -1/700
    perspectiveLayer.sublayerTransform = transform;

    var animation = CABasicAnimation(keyPath: "transform.rotation.x")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = -90*Double.pi/180
    firstJointLayer.add(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "transform.rotation.x")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = 180*Double.pi/180
    secondJointLayer.add(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "transform.rotation.x")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = -90*Double.pi/180
    bottomSleeve.add(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "bounds.size.height")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = perspectiveLayer.bounds.size.height
    animation.toValue = 0
    perspectiveLayer.add(animation, forKey: nil)


    animation = CABasicAnimation(keyPath: "position.y")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = perspectiveLayer.position.y
    animation.toValue = 0
    perspectiveLayer.add(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "opacity")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = 0.5
    topShadow.add(animation, forKey: nil)

    animation = CABasicAnimation(keyPath: "opacity")
    animation.duration = 2
    animation.autoreverses = true
    animation.repeatCount = 1000
    animation.fromValue = 0
    animation.toValue = 0.5
    middleShadow.add(animation, forKey: nil)
}
}
于 2018-05-31T15:17:58.127 に答える