image.png
就是先講它設(shè)為0，即隱藏
再設(shè)置時(shí)常
再恢復(fù)為初始狀態(tài)
override func viewDidLoad() {
super.viewDidLoad(）
ratingStackView.transform = CGAffineTransform(scaleX: 0, y: 0）
// Do any additional setup after loading the view.
}
override func viewDidAppear(_ animated: Bool) {
UIView.animate(withDuration: 1){
self.ratingStackView.transform = CGAffineTransform.identity
}
}
帶震動(dòng)的動(dòng)畫(huà)
UIView.animate(withDuration: 1, delay: 0, usingSpringWithDamping: 0.7, initialSpringVelocity: 0.8, options: [], animations: {
self.ratingStackView.transform = CGAffineTransform.identity
}, completion: nil)
后面兩個(gè)至越大越接近，震動(dòng)幅度越小，否則震動(dòng)幅度越大（如0.3和0.5）
動(dòng)畫(huà)組合 位置和大小同時(shí)變動(dòng)
image.png
