视图翻转效果

-(void)transformD{

    CGContextRef context=UIGraphicsGetCurrentContext();

    [UIViewbeginAnimations:nilcontext:context];

    [UIViewsetAnimationCurve:UIViewAnimationCurveEaseInOut];

    [UIViewsetAnimationDuration:1.0];

    [UIViewsetAnimationTransition:UIViewAnimationTransitionFlipFromLeftforView:self.viewcache:NO];

    

    //这里时查找视图里的子视图（这种情况查找，可能时因为父视图里面不只两个视图）

    NSInteger fist= [[self.baseViewsubviews] indexOfObject:[self.viewviewWithTag:200]];

    NSInteger seconde= [[self.baseViewsubviews] indexOfObject:[self.viewviewWithTag:300]];

    

    [self.baseViewexchangeSubviewAtIndex:fist withSubviewAtIndex:seconde];

    

    [UIViewsetAnimationDelegate:self];

    [UIViewcommitAnimations];

}