iOS development: Ch6-2 翻轉動畫

翻轉View

-(IBAction) switchViews: (id) sender{ //我們在switchViews時,才將yellowViewControll載入以確保不會照成記憶體的負擔

//要製作動畫,需要宣告一個動畫區塊

[UIView beginAnimations:@"View Flip" context:NULL]; //宣告一個動畫區塊 ,第一個參數是標題,第二個參數是 (Void *)  

[UIView setAnimationDuration:1.25]; //動畫曲線 ,設定動畫的快慢

[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; //讓動畫切入與轉出時速度變慢,中間則加速. 這樣是不是比較讚

if(self.yellowViewController.view.superview ==nil){// 若目前檢視不是yellow,那就更換成如下檢視

if(self.yellowViewController ==nil){//先確定是否沒有yellowViewController才開始如下建立它

YellowViewController *yellowController=[[YellowViewController alloc] initWithNibName: @"YellowView" bundle: nil];

self.yellowViewController=yellowController;

[yellowController release];

} 

/*iOS 提供以下方法來給我們做動畫

UIViewAnimationTransitionFlipFromRight

UIViewAnimationTransitionFlipFromLeft

UIViewAnimationTransitionCurlUp

UIViewAnimationTransitionCurlDown

我們使用 UIViewAnimationTransitionFlipFromRight與UIViewAnimationTransitionFlipFromRight讓動畫看起來像是左右翻轉

*/

[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight 

  forView: self.view 

cache:YES]; //使用cache 會讓動畫比較順暢,因為他會事先做截圖

[blueViewController viewWillAppear:YES]; //基本上是什麼也沒做,不過擔心iOS更新後會讓App動作變奇怪,所以還是實作它

[yellowViewController viewWillDisappear:YES];//基本上是什麼也沒做,不過擔心iOS更新後會讓App動作變奇怪,所以還是實作它

[blueViewController.view removeFromSuperview]; //將ｂlueView移除

[self.view insertSubview:yellowViewController.view atIndex:0]; //加入根檢視

[yellowViewController viewDidDisappear:YES];

[blueViewController viewDidAppear:YES];

}else{ //否則(若目前檢視不是blue,那就更換成如下檢視)

if(self.blueViewController ==nil){ //確定是沒有blueViewController,則如下建立它

BlueViewController *blueController=[[BlueViewController alloc] initWithNibName: @"BlueView" bundle: nil];

self.blueViewController=blueController;

[blueController release];

}

[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView: self.view cache:YES];

[yellowViewController viewWillAppear:YES];//基本上是什麼也沒做,不過擔心iOS更新後會讓App動作變奇怪,所以還是實作它

[blueViewController viewWillDisappear:YES];//基本上是什麼也沒做,不過擔心iOS更新後會讓App動作變奇怪,所以還是實作它

[yellowViewController.view removeFromSuperview];//將yellowView移除

[self.view insertSubview:blueViewController.view atIndex:0];//加入根檢視

[blueViewController viewDidDisappear:YES];//基本上是什麼也沒做,不過擔心iOS更新後會讓App動作變奇怪,所以還是實作它

[yellowViewController viewDidAppear:YES];//基本上是什麼也沒做,不過擔心iOS更新後會讓App動作變奇怪,所以還是實作它

}

[UIView commitAnimations];

}