UIView的动画是通过修改控件的属性来达到动画的效果,如:渐变, 移动.
废话不多说,直接上代码:
- (void)loadView{
[super loadView];
_leftView = [[UIView alloc]initWithFrame: CGRectMake(, , , )];
_rightView = [[UIView alloc]initWithFrame: CGRectMake(, , , )];
_leftView.backgroundColor = [UIColor grayColor];
_rightView.backgroundColor = [UIColor grayColor];
_btnStart = [UIButton buttonWithType:UIButtonTypeRoundedRect];
_btnStart.frame = CGRectMake( / - / , , , );
[_btnStart setTitle: @"startAnimation" forState:UIControlStateNormal];
[_btnStart addTarget:self action:@selector(startAnimating)forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview: _leftView];
[self.view addSubview: _rightView];
[self.view addSubview: _btnStart];
[_leftView release];
[_rightView release];
[self.navigationController setNavigationBarHidden: YES];
}
- (void)startAnimating{
_leftView.alpha = 1.0;
_rightView.alpha = 2.0;
_btnStart.alpha = 1.0;
_btnStart.transform = CGAffineTransformScale(_btnStart.transform, 1.0, 1.0);
[UIView beginAnimations: nil context: nil];//标记UIView动画开始,第一个参数是给动画的名称定义一个名字,在多个动画需要逻辑处理的时候定义,一般简单的动画可以忽略;第二个参数是上下文,暂且忽略;
[UIView setAnimationCurve: UIViewAnimationCurveEaseIn];//定义动画的曲线(动画的开始与结束的快慢),UIViewAnimationCurveEaseIn为默认类型;
[UIView setAnimationDuration: 1.5];//定义动画的持续时间,数值越大动画时间越长,也就是所谓的动画越慢;
[UIView setAnimationDelegate: self];//设置代理, 可以监听动画开始和结束时;
[UIView setAnimationDidStopSelector:@selector(animationDidStop)];//动画结束时调用animationDidStop方法;
/* 动画变化在这里修改 */
CGRect lFrame = _leftView.frame;
CGRect rFrame = _rightView.frame;
lFrame.origin.x = -;//通过改变x坐标达到做移动的效果
rFrame.origin.x = ;
_leftView.frame = lFrame;
_rightView.frame = rFrame;
_leftView.alpha = 0.1;//通过改变透明度达到渐变的效果
_rightView.alpha = 0.1;
_btnStart.alpha = 0.0;
_btnStart.transform = CGAffineTransformScale(_btnStart.transform, 0.1, 0.1);//通过改变缩放比例达到动画效果
/* 动画变化这里结束 */
[UIView commitAnimations];//确认提交动画
}
- (void)animationDidStop{
CAAnimationViewController *caAnimationVC = [[CAAnimationViewController alloc]init];//创建一个新的ViewController命名为CAAnimationViewController,为了下一节的笔记;
[UIView beginAnimations: nil context:nil];//开始动画
[UIView setAnimationDuration:0.5];//动画持续时间
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.navigationController.view cache: YES];//Transition 就是过渡的意思,
//过渡方法:第一个参数是过渡动画类型,这里是右转动,枚举类型;
//第二个参数是需要过渡的视图对象,也就是过渡页面的父类型,暂且这么记,下文有详细解释;
//第三个参数是是否缓存,如果是YES，那么在开始和结束图片视图渲染一次并在动画中创建帧；否则，视图将会在每一帧都渲染。例如缓存，你不需要在视图转变中不停的更新，你只需要等到转换完成再去更新视图。
[UIView commitAnimations];//提交动画
[self.navigationController pushViewController: caAnimationVC animated: NO];//push页面
[caAnimationVC release];
}
关于setAnimationTransition第二个参数view,要传入过渡的父类, 做过渡的两个view是rootViewController和caAnimationVC,rootViewController的上一层(父类)是UINavigationContorller,所以传入的是self.navigationController.view.