iPhone 上的摇动视觉效果（不是摇动设备）

iPhone 摇动视觉效果的实现原理及应用案例

swift
import UIKit
import CoreMotion
class ViewController: UIViewController {
    let motionManager = CMMotionManager()
    override func viewDidLoad() {
        super.viewDidLoad()
        // 添加摇动手势
        let shakeGesture = UITapGestureRecognizer(target: self, action: #selector(shake))
        view.addGestureRecognizer(shakeGesture)
        // 开始监听加速度传感器数据
        motionManager.startAccelerometerUpdates()
    }
    @objc func shake() {
        // 判断设备是否正在摇动
        if let acceleration = motionManager.accelerometerData?.acceleration {
            let accelerationThreshold = 1.5 // 摇动强度阈值
            if abs(acceleration.x) > accelerationThreshold || abs(acceleration.y) > accelerationThreshold || abs(acceleration.z) > accelerationThreshold {
                // 模拟摇动效果
                UIView.animate(withDuration: 0.5, delay: 0, options: [.autoreverse, .repeat], animations: {
                    self.view.transform = CGAffineTransform(translationX: 10, y: 0)
                    self.view.alpha = 0.8
                }, completion: { _ in
                    self.view.transform = .identity
                    self.view.alpha = 1.0
                    // 在摇动结束后执行抽奖逻辑
                    self.performLottery()
                })
            }
        }
    }
    func performLottery() {
        // 执行抽奖逻辑
        // ...
    }
}