@interface ViewController ()

@property(nonatomic,retain)UIView *redview;

@property(nonatomic,retain)UIView *yellowview;

@end

@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.redview=[[UIView alloc] initWithFrame:CGRectMake(, , , )];

    self.redview.backgroundColor=[UIColor redColor];

    [self.view addSubview:self.redview];

    [self.redview release];

    self.yellowview=[[UIView alloc] initWithFrame:CGRectMake(, , , )];

  _yellowview.backgroundColor=[UIColor yellowColor];

    [self.view addSubview:_yellowview];

    //[_yellowview release];

}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    //转场动画，切换两个view  注意：如果要切换两个viewcontroller做转场要找到共同view；

    UIView *fromvalue=nil;

    UIView *tovalue=nil;

    if(_yellowview.superview){

        fromvalue=_yellowview;

        tovalue=_redview;

    }

    else{

        fromvalue=_redview;

        tovalue=_yellowview;

    }

    [UIView transitionFromView:fromvalue toView:tovalue duration:0.5 options:UIViewAnimationOptionTransitionFlipFromBottom completion:^(BOOL finished) {

       //这个api 原理   ：

//        1:[fromvalue.superview addSubview:tovalue];

//        2:[fromvalue removeFromSuperview];

        NSLog(@"fromvalue-->%@",fromvalue.superview);

        NSLog(@"tovalue-->%@",tovalue.superview);

    }];

}