Iphone 当我们打开UIPickerView时，视图将如何自动滚动？

我在UIButton点击时打开UIPickerView，我在UIPickerView上调用提交动画，UIPikerView像键盘一样从屏幕底部到中间打开，我想在picker视图显示时向上滚动视图，因为当UIPikerView打开时，我调用UIPickerView的按钮被UIPikerView隐藏。那么，如何在选择器视图打开时自动滚动视图呢？

您可以使用此选项向上滚动主视图，向下滚动主视图

- (void)scrollUpView {
    CGFloat kMoveRatio = 50.0f // Change to view the buttons
    [UIView beginAnimations:@"UP" context:nil];
    CGRect aVFrame = self.view.frame;
    [self.view setFrame:CGRectMake(aVFrame.origin.x, aVFrame.origin.y - kMoveRatio, aVFrame.size.width, aVFrame.size.height)];
    [UIView commitAnimations];

}

-(void)scrollDownView
{
    [UIView beginAnimations:@"DOWN" context:nil];
    CGRect aVFrame = self.view.frame;
    [self.view setFrame:CGRectMake(aVFrame.origin.x, 0, aVFrame.size.width, aVFrame.size.height)];
    [UIView commitAnimations];
}

---

您可以使用此选项向上和向下滚动主视图

- (void)scrollUpView {
    CGFloat kMoveRatio = 50.0f // Change to view the buttons
    [UIView beginAnimations:@"UP" context:nil];
    CGRect aVFrame = self.view.frame;
    [self.view setFrame:CGRectMake(aVFrame.origin.x, aVFrame.origin.y - kMoveRatio, aVFrame.size.width, aVFrame.size.height)];
    [UIView commitAnimations];

}

-(void)scrollDownView
{
    [UIView beginAnimations:@"DOWN" context:nil];
    CGRect aVFrame = self.view.frame;
    [self.view setFrame:CGRectMake(aVFrame.origin.x, 0, aVFrame.size.width, aVFrame.size.height)];
    [UIView commitAnimations];
}

使用以下代码：

[UIView animateWithDuration:.5f animations:^{
  CGRect theFrame = myView.frame;
  //Change your frame here
  myView.frame = theFrame;
}];

使用以下代码：

[UIView animateWithDuration:.5f animations:^{
  CGRect theFrame = myView.frame;
  //Change your frame here
  myView.frame = theFrame;
}];

---

谢谢，如果我还想在调用scrollUpView后向上/向下滚动视图以查看所有按钮（如使用uiscrollview），并且uipickerview仍会打开，我该怎么办？谢谢，如果我还想在调用scrollUpView后向上/向下滚动视图以查看所有按钮（如使用uiscrollview）而且uipickerview仍然打开我该怎么做？