切换view的动画

代码：

#import "MainViewController.h"

@interface MainViewController ()

@end

@implementation MainViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIView *view1 = [[UIView alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
    view1.backgroundColor = [UIColor blueColor];

    UIView *view2 = [[UIView alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
    view2.backgroundColor = [UIColor yellowColor];

    [self.view addSubview:view1];
    [self.view addSubview:view2];
}

-(void) changeView
{
    NSLog(@"change view");
    CGContextRef context = UIGraphicsGetCurrentContext();
    [UIView beginAnimations:nil context:context];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationDuration:1.0];

    [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:self.view cache:YES];
    [self.view exchangeSubviewAtIndex: withSubviewAtIndex:];

    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:nil];
    [UIView commitAnimations];
}

-(void) changeView2
{
    CATransition *animation = [CATransition animation];
    [animation setDuration:1.25f];
    [animation setTimingFunction:[CAMediaTimingFunction
                                  functionWithName:kCAMediaTimingFunctionEaseIn]];
    [animation setType:kCATransitionReveal];
    [animation setSubtype: kCATransitionFromRight];
    [self.view.layer addAnimation:animation forKey:@"Reveal"];

    [self.view exchangeSubviewAtIndex: withSubviewAtIndex:];

    [CATransaction commit];
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self changeView];
}
@end