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iOS UIView动画基础

iOS UIView动画基础

作者: iOS_July | 来源:发表于2018-06-28 11:56 被阅读122次
logo.jpg

>基础部分


前言:

一直在想,感觉自己做了这么久开发了,常用的库UI控件网络开发等都有一定的经验了,但是为什么自己做出来的东西就少了那么些B格,就是没有人大神做出来的感觉?

其实答案有很多,一定经验,并不等于透彻。再者往往越到后期,越是注重架构资源节约性能优化,然而这些不是一天两天能够出来得了的,那么怎么才能让自己的app看上去让人眼前一亮、甚至惊叹呢?那就是动画无疑了。

对于普通用户而言,颜值即正义,这句话不是盖的,满足功能需求后,应当积极追求更精美的UI更优良的用户体验感

UIView动画.png
由上图可见,UIView已经囊括了很多动画了,通过 UIView.animate 接口进行使用

一、Position[位置]

position.gif
  • 横向移动,改变view的x即可,同理,纵向改变view的y即可
UIView.animate(withDuration: 1) {
    self.pinkSquare.center.x = self.view.bounds.width - self.pinkSquare.center.x
    
}
  • 延时操作
UIView.animate(withDuration: 1, delay: 0.5, options: .curveLinear, animations: {
    
    self.purpleSquare.center.y = self.view.bounds.height - self.purpleSquare.center.y
}, completion: nil)

二、Opacity[透明度]

Opacity.gif
  • 0 -> 1显示程度一次递增
UIView.animate(withDuration: 1) {
     self.pinkSquare.alpha = 0
}

三、Scale[缩放]

Scale.gif
  • >1.0 放大,<1.0 缩小
UIView.animate(withDuration: 1) {
    self.purpleSquare.transform = CGAffineTransform.init(scaleX: 2.0, y: 2.0)
}

四、Color[颜色]

Color.gif
UIView.animate(withDuration: 1) {
    self.greenSquare.backgroundColor = UIColor.orange
    self.colorLab.textColor = UIColor.white
}

五、Rotation[翻转]

rotation.gif
  • M_PI -> 180度
UIView.animate(withDuration: 1) {
     self.pinkSquare.transform = CGAffineTransform.init(rotationAngle: CGFloat(M_PI))
}

>进阶部分


一、UIView动画的Timing

  • 各属性的原始状态
  • 各属性的结束状态
  • 执行时长
  • 执行过程
  • 执行完毕的处理

二、UIView动画的重复执行

repeat.gif
  • Repeat
UIView.animate(withDuration: 1, delay: 0, options: .repeat, animations: {
    self.greenSquare.center.x = self.view.bounds.width - self.greenSquare.center.x
}, completion: nil)
  • Autoreverse
UIView.animate(withDuration: 1, delay: 0, options: [.repeat, .autoreverse], animations: {
    self.purpleSquare.center.x = self.view.bounds.width - self.purpleSquare.center.x
}, completion: nil)

三、UIView Easing动画[变速]

Easing.gif Easing
  • 默认为curveLinear[匀速]
UIView.animate(withDuration: 1) {//默认为curveLinear
    self.pinkSquare.center.x = self.view.bounds.width - self.pinkSquare.center.x
}
  • curveEaseIn[先慢后快]
UIView.animate(withDuration: 1, delay: 0, options: .curveEaseIn, animations: {
    self.garySquare.center.x = self.view.bounds.width - self.garySquare.center.x
}, completion: nil)
  • curveEaseOut[先快后慢]
UIView.animate(withDuration: 1, delay: 0, options: .curveEaseOut, animations: {
    self.purpleSquare.center.x = self.view.bounds.width - self.purpleSquare.center.x
}, completion: nil)
  • curveEaseInOut[先慢中快后慢]
UIView.animate(withDuration: 1, delay: 0, options: .curveEaseInOut, animations: {
    self.greenSquare.center.x = self.view.bounds.width - self.greenSquare.center.x
}, completion: nil)
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四、UIView Spring动画[弹簧,iOS7.0]

Spring
// 弹簧效果基于物理,之前的基于数学
// usingSpringWithDamping阻力,>1<
// initialSpringVelocity初速度
UIView.animate(withDuration: 3, delay: 0, usingSpringWithDamping: 0.2, initialSpringVelocity: 0, options: .curveLinear, animations: {
    self.greenSquare.center.x = self.view.bounds.width - self.greenSquare.center.x
}, completion: nil)
Spring.gif

>结束语


越写、越看、越学习,发现自己越菜......

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