//启动页动画

UIImageView *launchScreen = [[UIImageView alloc]initWithFrame:[UIScreen mainScreen].bounds];

    launchScreen.image = [UIImage imageNamed:@"launchScreen"];

    [self.window addSubview:launchScreen];

    [UIView animateWithDuration:1.0f animations:^{

        launchScreen.alpha = ;

//        CGRect frame = [UIScreen mainScreen].bounds;

//        frame.origin.x = frame.size.width;

//        launchScreen.frame = frame;

    }completion:^(BOOL isFinished){

        [launchScreen removeFromSuperview];

    }];

CGRect frame = _confirmV.frame;

    [UIView beginAnimations:nil context:nil];//动画定义开始

    [UIView setAnimationDuration:0.5];//动画的时长

    [UIView setAnimationDelay:];

    [UIView setAnimationDelegate:self];

    [UIView setAnimationDidStopSelector:@selector(removeConfirmView)];//动画完成时执行的SEL，必须设置delegate

    frame.origin.y += HEIGHT(self.view);//这三句就是要执行的动画语句

    targetView.frame = frame;

    targetView.alpha -= 0.1;

    [UIView commitAnimations];//动画定义结尾