Scroll view - How to keep the objects in the view

I have a scroll view which has numerous textfields and then some UISwitches and UIButtons followed by more textfields.

I have found the textFieldDidBeginEditing event and use that to scroll the textfield into the view. But I have not found something similar for the other objects like the UISwitch and UIButton.

Is there something that does this? Below is the code I use for the textfields:

- (void)textFieldDidBeginEditing:(UITextField *)textField {  
    [self scrollViewToCenterOfScreen:textField];  
} 



- (void)scrollViewToCenterOfScreen:(UIView *)theView {  
    CGFloat viewCenterY = theView.center.y;  
    CGRect applicationFrame = [[UIScreen mainScr开发者_运维百科een] applicationFrame];  

    CGFloat availableHeight = applicationFrame.size.height - _keyboardHeight;    // Remove area covered by keyboard  

    CGFloat y = viewCenterY - availableHeight / 2.0;  
    if (y < 0) {  
        y = 0;  
    }  
    ScrollView.contentSize = CGSizeMake(applicationFrame.size.width, applicationFrame.size.height + _keyboardHeight);  
    [ScrollView setContentOffset:CGPointMake(0, y) animated:YES];  



}  

You can use the UIControlEventValueChanged event.

[switchControl addTarget:self action:@selector(scrollViewToCenterOfScreen:) forControlEvents:UIControlEventValueChanged];