实现SwiftyCam焦点动画-Swift

编程问答 2022-08-12

问题描述

每当我在屏幕上进行对焦时，我都会尝试制作动画。 我正在使用以下GitHub存储库：SwiftyCam

我实现的问题是动画不会居中，而中心是作为参数传递给函数的，而是动画在屏幕的左上方播放。

 func swiftyCam(_ swiftyCam: MyCameraviewController,didFocusAtPoint point: CGPoint) {
    
    focusAnimationAt(point)
}



fileprivate func focusAnimationAt(_ point: CGPoint) {
    
    let focusView = UIImageView(image: #imageLiteral(resourceName: "focusImage"))
    focusView.translatesAutoresizingMaskIntoConstraints = false
    focusView.heightAnchor.constraint(equalToConstant: 40).isActive = true
    focusView.widthAnchor.constraint(equalToConstant: 40).isActive = true
    focusView.center = point
    focusView.alpha = 0.0
    view.addSubview(focusView)
    
    UIView.animate(withDuration: 0.25,delay: 0.0,options: .curveEaseInOut,animations: {
        focusView.alpha = 1.0
        focusView.transform = CGAffineTransform(scaleX: 1.25,y: 1.25)
    }) { (success) in
        UIView.animate(withDuration: 0.15,delay: 0.5,animations: {
            focusView.alpha = 0.0
            focusView.transform = CGAffineTransform(translationX: 0.6,y: 0.6)
        }) { (success) in
            focusView.removeFromSuperview()
        }
    }
}

解决方法

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