iOS Swift控制器转场动画示例代码

前言

在ios开发中,我们model另外一个控制器的时候,一般都使用默认的转场动画。本文将给大家详细介绍关于ios swift控制器转场动画的相关内容，分享出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧。

返回效果也可更改

四种转场动画

      1. move：源图片位置移动到目标图片位置；

      2. circle：根据源控件大小创建圆形或者椭圆形path路径，放大展示目标；

      3. tier：源左右，目标由小到大缩放；

      4. middle：源的中心点开始放大，返回是缩回到中心。

代码解析

给uiviewcontroller添加一个属性yy_routeranimation: yytransition

extension uiviewcontroller {
 public var yy_routeranimation : yytransition {
  set {
   objc_setassociatedobject(self, &yytransitionkey.krouteranimationkey, newvalue, .objc_association_retain_nonatomic)
  }
  get {
   guard let r = objc_getassociatedobject(self, &yytransitionkey.krouteranimationkey) as? yytransition else {
    return yytransition()
   }
   return r
  }
 }
}

yytransition类

public class yytransition: nsobject

遵守代理

extension yytransition: uiviewcontrolleranimatedtransitioning, uiviewcontrollertransitioningdelegate, uinavigationcontrollerdelegate

实现代理方法

  return self
 }
 
 public func transitionduration(using transitioncontext: uiviewcontrollercontexttransitioning?) -> timeinterval {
  return 转场动画所需时间
 }

这个方法内调用相应动画方法

 public func animatetransition(using transitioncontext: uiviewcontrollercontexttransitioning) {
  switch self.yy_ransitionanimationtype {
  case .circle:
   break
  case .move:
   break
  case .middle:
   break
  case .tier:
   break
  }
 }

相关属性

extension yytransition {
 // 是push还是pop
 public var yy_isback: bool {}
 // 动画类型
 var yy_ransitionanimationtype: yytransitionanimationtype {}
 // 源view名字 
 var yy_fromviewpath: string? { }
 // 目标view名字 
 var yy_toviewpath: string? { }
 // 句柄
 var yy_transitioncontext: uiviewcontrollercontexttransitioning {}
}

实现基础动画结束时的代理方法

extension yytransition: caanimationdelegate {
 public func animationdidstop(_ anim: caanimation, finished flag: bool) {
  yy_transitioncontext.completetransition(!yy_transitioncontext.transitionwascancelled)
  yy_transitioncontext.viewcontroller(forkey: .from)?.view.layer.mask = nil
  yy_transitioncontext.viewcontroller(forkey: .to)?.view.layer.mask = nil
 }
}

基础动画对路径操作的动画

extension yytransition {
 func maskanimation(targetvc: uiviewcontroller, startpath: uibezierpath, endpath: uibezierpath, context: uiviewcontrollercontexttransitioning) {
}

下面四个文件内实现相对应的动画

yytransition+circle
yytransition+move
yytransition+tier
yytransition+middle

动画实现的思想基本就是拿到源view和目标view，控制位置和大小，做相应的动画即可。
用到的方法

uiviewcontrollercontexttransitioning 调用
public func viewcontroller(forkey key: uitransitioncontextviewcontrollerkey) -> uiviewcontroller?
uiviewcontroller调用
open func value(forkeypath keypath: string) -> any?
* when requesting a snapshot, 'afterupdates' defines whether the snapshot is representative of what's currently on screen or if you wish to include any recent changes before taking the snapshot. 
open func snapshotview(afterscreenupdates afterupdates: bool) -> uiview?
open func convert(_ rect: cgrect, from view: uiview?) -> cgrect
open func insertsubview(_ view: uiview, belowsubview siblingsubview: uiview)
// this must be called whenever a transition completes (or is cancelled.)
 // typically this is called by the object conforming to the
 // uiviewcontrolleranimatedtransitioning protocol that was vended by the transitioning
 // delegate. for purely interactive transitions it should be called by the
 // interaction controller. this method effectively updates internal view
 // controller state at the end of the transition.
public func completetransition(_ didcomplete: bool)

具体代码在ye项目地址中yytransition动态库中

eg在yysourcetransitionviewcontroller和yytargettransitionviewcontroller中可以看到。

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对的支持。