ios - 获取与 Phibrow App 相同的标签动画

Question

我想创建与 Phibrow App 中相同的动画.请参阅以下视频了解更多详情:- https://www.dropbox.com/s/wwc69a9ktaa52je/IMG_0155.MOV?dl=0

我已尝试使用 UIPinchGestureRecognizer、UIRotationGestureRecognizer 和 UIPanGestureRecognizer 获取此动画。但是还不能得到这个动画。

func handlePinchGesture(gesture: UIPinchGestureRecognizer) {
    if gesture.state == UIGestureRecognizerState.began || gesture.state == UIGestureRecognizerState.changed{
        //print("UIPinchGestureRecognizer")

        gesture.view?.transform = (gesture.view?.transform)!.scaledBy(x: gesture.scale, y: gesture.scale)
        gesture.scale = 1.0
    }
}


func handleRotationGesture(gesture: UIRotationGestureRecognizer) {
    if gesture.state == UIGestureRecognizerState.began || gesture.state == UIGestureRecognizerState.changed{
        print("UIRotationGestureRecognizer : ", gesture.rotation)
        gesture.view?.transform = (gesture.view?.transform)!.rotated(by: gesture.rotation)
        gesture.rotation = 0
    }
}

func handlePanGesture(gesture: UIPanGestureRecognizer) {
    if gesture.state == UIGestureRecognizerState.began || gesture.state == UIGestureRecognizerState.changed{
        //print("UIPanGestureRecognizer")
        let translation = gesture.translation(in: view)
        gesture.view?.transform = (gesture.view?.transform)!.translatedBy(x: translation.x, y: translation.y)
        gesture.setTranslation(CGPoint(x: 0, y: 0), in: view)
    }
}

有什么办法可以得到这个动画吗？

Answer 1

我认为这段代码适合你。 我已经声明了两个 View firstView 和 secondView 并为这两个 View 添加了单独的手势 例如在 panGesture 的情况下:

firstPan = UIPanGestureRecognizer(target: self, action: #selector(self.handlePanGesture(gesture:)))
    secondPan = UIPanGestureRecognizer(target: self, action: #selector(self.handlePanGesture(gesture:)))
    firstView.addGestureRecognizer(secondPan!)
    secondView.addGestureRecognizer(firstPan!)

对于捏和旋转，我使用与上面相同的方法来添加手势。 对于您的情况，您需要捏合和旋转手势，但平移手势同时适用于两个 View ，因此只需检查哪个 View 并为其他 View 应用变换。

@objc func handlePinchGesture(_ gestureRecognizer: UIPinchGestureRecognizer) {
    guard gestureRecognizer.view != nil else { return }
    if gestureRecognizer.state == .began || gestureRecognizer.state == .changed {
        if gestureRecognizer.view == firstView {
            gestureRecognizer.view?.transform = (gestureRecognizer.view?.transform.scaledBy(x: gestureRecognizer.scale, y: gestureRecognizer.scale))!
            secondView.transform = (secondView.transform.scaledBy(x: gestureRecognizer.scale, y: gestureRecognizer.scale))
            gestureRecognizer.scale = 1.0
        }else{
            gestureRecognizer.view?.transform = (gestureRecognizer.view?.transform.scaledBy(x: gestureRecognizer.scale, y: gestureRecognizer.scale))!
            firstView.transform = (firstView.transform.scaledBy(x: gestureRecognizer.scale, y: gestureRecognizer.scale))
            gestureRecognizer.scale = 1.0
        }
    }
}


@objc func handleRotationGesture(gesture: UIRotationGestureRecognizer) {
    if gesture.state == UIGestureRecognizerState.began || gesture.state == UIGestureRecognizerState.changed{
        if gesture.view == firstView {
            gesture.view?.transform = (gesture.view?.transform)!.rotated(by: gesture.rotation)
            secondView.transform = (secondView.transform).rotated(by: gesture.rotation)
            gesture.rotation = 0
        }else{
            gesture.view?.transform = (gesture.view?.transform)!.rotated(by: gesture.rotation)
            firstView.transform = (firstView.transform).rotated(by: gesture.rotation)
            gesture.rotation = 0
        }
    }
}

@objc func handlePanGesture(gesture: UIPanGestureRecognizer) {
    if gesture.state == UIGestureRecognizerState.began || gesture.state == UIGestureRecognizerState.changed{
        let translation = gesture.translation(in: view)
        gesture.view?.transform = (gesture.view?.transform)!.translatedBy(x: translation.x, y: translation.y)
        gesture.setTranslation(CGPoint(x: 0, y: 0), in: view)
    }
}