How to hide number pad using background Tap?

Question

I study iOS SDK using this book and in 4 Chapter, when it tells you how to hide number pad with background tap I have a problem. I do that author says but nothing happened. How I can do this? What book's author says:

1)Create new method backgroundTap in ViewController.h

- (IBAction)touchBackground:(id)sender;

2)Add method in ViewController.m

-(void)touchBackground:(id)sender{
[nameField resignFirstResponder];
[numberField resignFirstResponder];}

3)Change class identity of View object in Interface Builder(as I understand in Xcode 4 its Control) from UIView to UIControl

4)Connect TouchDown method in events list with File's Owner and check method backgroundTap.

This is my code samples

• ViewController.h
• ViewController.m

P.S. I'm sorry for my English, I translated all information from the book to english because I have russian translate.

Answer 1

I think you might make this simpler by just implementing a method like this:

- (IBAction)backgroundTouched:(id)sender {
    [self.view endEditing:YES];
}

make the background view UIControl instead of UIView in interface builder and hook the touches up event to this method.

Have a look at this small example project. I have done exactly this in the secondViewController where touching the background dismissed the keyboard. You can also see how I have changed the background to a UIControl in secondViewController.xib

Answer 2

Something you might want to try, without changing the background view, is:

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    [nameField resignFirstResponder];
    [numberField resignFirstResponder];
}

Answer 3

You may have done Step 4 ("Connect TouchDown method in events list with File's Owner and check method backgroundTap") incorrectly. Include an NSLog in your touchBackground method to check whether the method is being called.

-(void)touchBackground:(id)sender{
[nameField resignFirstResponder];
[numberField resignFirstResponder];
NSLog(@"touchBackground was called");
}

If the message ("touchBackground was called") doesn't show up in your console, then you known touchBackground is not being called.