效果图
未标题-1.gif
渐变:将一幅图像混合成另一幅图像的动画，如背景变换。
主要代码
//transitionCrossDissolve旧视图溶解消失显示下一个新视图的效果, imageView:要换图片的imageview，newImage:更换的新图片
UIView.transition(with: imageView, duration: 1.0, options: .transitionCrossDissolve, animations: {
imageView.image = newImage
}, completion: nil)
模拟3d：使看起来像在一个方块上滚动显示，如航班和登机门显示。使label缩短，看起来像是滚到后面一样
主要代码
label.transform = CGAffineTransform(translationX: 0.0, y: -auxLabelOffset).scaledBy(x: 1.0, y: 0.1)
分段：如图中的飞机飞行
主要代码：
//创建帧动画，总时长1.5秒
UIView.animateKeyframes(withDuration: 1.5, delay: 0.0, animations: {
//添加帧动画，从0秒开始，经过0.25秒
UIView.addKeyframe(withRelativeStartTime: 0.0, relativeDuration: 0.25, animations: {
self.planeImage.center.x += 80.0//飞机向右飞80
self.planeImage.center.y -= 10.0//向上10
})
//添加帧动画，从0.1秒开始，经过0.4秒
UIView.addKeyframe(withRelativeStartTime: 0.1, relativeDuration: 0.4) {
self.planeImage.transform = CGAffineTransform(rotationAngle: -.pi / 8)//飞机抬头
}
UIView.addKeyframe(withRelativeStartTime: 0.25, relativeDuration: 0.25) {
self.planeImage.center.x += 100.0
self.planeImage.center.y -= 50.0
self.planeImage.alpha = 0.0
}
UIView.addKeyframe(withRelativeStartTime: 0.51, relativeDuration: 0.01) {
self.planeImage.transform = .identity
self.planeImage.center = CGPoint(x: 0.0, y: originalCenter.y)
}
UIView.addKeyframe(withRelativeStartTime: 0.55, relativeDuration: 0.45) {
self.planeImage.alpha = 1.0
self.planeImage.center = originalCenter
}
}, completion: nil)
