转场动画介绍
转场动画在我们日常开发中是经常遇到的，所谓转场动画，就是一个控制器的view切到另一个控制器的view上过程中过的动画效果。本例子是实现了在导航控制器的titleview边上慢慢弹出一个控制器。下面话不多说，来一起看看详细的介绍：
效果图：
专场前
专场后
示例代码
首先自定义一个animator类。在需要转场的控制器内，设置代理
|
1
|
//需要设置转场动画的控制器titleviewvc.transitioningdelegate = aniamator//这里的animator是animator的实例 |
下面是animator类中的代码
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
class animatortool: nsobject { lazy var ispresent = false var callback : ((ispresented:bool)->())?//向外界传递动画是否正在显示 init(callback : ((ispresented:bool)->())) { self.callback = callback }//自定义构造方法，便于给闭包赋值}extension animatortool:uiviewcontrollertransitioningdelegate{ func presentationcontrollerforpresentedviewcontroller(presented: uiviewcontroller, presentingviewcontroller presenting: uiviewcontroller, sourceviewcontroller source: uiviewcontroller) -> uipresentationcontroller? { return awypresentationcontroller(presentedviewcontroller: presented, presentingviewcontroller: presenting)//awypresentationcontroller是自定义继承自uipresentationcontroller的类，是为了设置modal出来的vc的view的大小 } func animationcontrollerforpresentedcontroller(presented: uiviewcontroller, presentingcontroller presenting: uiviewcontroller, sourcecontroller source: uiviewcontroller) -> uiviewcontrolleranimatedtransitioning? { ispresent = true self.callback!(ispresented: ispresent) return self } func animationcontrollerfordismissedcontroller(dismissed: uiviewcontroller) -> uiviewcontrolleranimatedtransitioning? { ispresent = false self.callback!(ispresented: ispresent) return self }}extension animatortool:uiviewcontrolleranimatedtransitioning{ func transitionduration(transitioncontext: uiviewcontrollercontexttransitioning?) -> nstimeinterval { return 0.5//动画时长 } func animatetransition(transitioncontext: uiviewcontrollercontexttransitioning) { ispresent ?animatetransitionforpresented(transitioncontext) : animatetransitionfordismissed(transitioncontext) } func animatetransitionforpresented(transitoncontext:uiviewcontrollercontexttransitioning){ let aimview = transitoncontext.viewforkey(uitransitioncontexttoviewkey)! transitoncontext.containerview()?.addsubview(aimview) aimview.transform = cgaffinetransformmakescale(1.0, 0.0) uiview.animatewithduration(transitionduration(transitoncontext), animations: { aimview.layer.anchorpoint = cgpointmake(0.5, 0.0) aimview.transform = cgaffinetransformidentity }) { (_) in transitoncontext.completetransition(true) } } func animatetransitionfordismissed(transitoncontext:uiviewcontrollercontexttransitioning){ let aimview = transitoncontext.viewforkey(uitransitioncontextfromviewkey)! transitoncontext.containerview()?.addsubview(aimview) uiview.animatewithduration(transitionduration(transitoncontext), animations: { aimview.layer.anchorpoint = cgpointmake(0.5, 0.0) aimview.transform = cgaffinetransformmakescale(1.0, 0.001)//留一点值，这样会有动画效果 }) { (_) in transitoncontext.completetransition(true) } }} |
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能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对服务器之家的支持。
原文链接：http://www.jianshu.com/p/afb04b49be41
