iOS开发--UIPickerView的动画效果

开发中用到UIPickerView显示和隐藏的动画.随手记一下

第一步:写一个动画方法

- (void)ViewAnimation:(UIView*)view willHidden:(BOOL)hidden {        [UIView animateWithDuration:0.3 animations:^{        if (hidden) {            view.frame = CGRectMake(0, [UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width, view.bounds.size.height);        } else {            [view setHidden:hidden];            view.frame = CGRectMake(0, [UIScreen mainScreen].bounds.size.height - view.bounds.size.height, [UIScreen mainScreen].bounds.size.width, view.bounds.size.height);        }    } completion:^(BOOL finished) {        [view setHidden:hidden];    }];}