UIPickerView显示和隐藏的动画详解手机开发

    - (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];   
        }];   
    }  

UIPickerView显示和隐藏的动画.