textFieldDidBeginEditing: for more than one textfield - iphone

Question

I am fairly new to iphone programming and here I am facing some issues. Now in my application, I have two textfields and I want to fire an event while second textfield starts editing. now I am using following function
- (void)textFieldDidBeginEditing:(UITextField *)textField
but the thing is the event is being fired when the first textfield starts editing. It does not wait for the second text field. Is there any way I can use this function for the second textfield or may be somehow could know and pass it the value of the active textfield?
I tried writing the name of the textfield instead of (UITextField *)textField in the function but still the same result.

Answer 1

If I were you , I would set a tag (in Interface Builder) of the second textField to 2, or something similar. Then you can just do this:
-(void)textFieldDidBeginEditing:(UITextField *)textField {
if (textField.tag == 2) {
//this is textfield 2, so call your method here
}
}
EDIT: Please do this to see if the method is even called:
-(void)textFieldDidBeginEditing:(UITextField *)textField {
NSLog(#"The method was called");
}
For Swift 2.2
func textFieldDidBeginEditing(textField: UITextField) {
if textField.tag == 2 {
//this is textfield 2, so call your method here
}
}

Answer 2

That delegate method is gonna get called everytime the editing of ANY text field is started, so it should be you who controls what is done when this happens. I suggest you to do something like:
-(void)textFieldDidBeginEditing: (UITextField *)textField
{
if (textField == mySecondTextField)
{
//Do what you need
}
else
{
//Do nothing
}
}
I hope it helps you!

Answer 3

Utilitize the tag property in Interface Builder to identify your view objects in your application at runtime. It will make life a lot easier, especially when you get ready to localize your application for different languages.
In your header file for your view controller
#define kUsernameField 100
#define kPasswordField 101
#define kStartButton 300
In the view controller implementation file
- (void)textFieldDidBeginEditing:(UITextField *)textField {
switch (textField.tag) {
case kUsernameField:
// do user name stuff
break;
case kPasswordField:
// do password stuff
break;
default:
NSLog(#"No case statement for %#", [textField description]);
break;
}
}
You will find a lot of tutorial out there that use the title field of UIButton to identify them. For example:
- (IBAction)buttonTouchUp:(id)sender {
UIButton *button = (UIButton *)sender;
// don't like
if ([button.currentTitle isEqualToString:#"Start"] == NSOrderedSame) {
// because if localize your for other language then you will have
// include code for those other language
// French: Démarrer
// Spanish: Inicio
// blah blah blah
}
// better
if (button.tag == kStartButton) {
// very simple, no code changes for localization
// blah blah blah
}
}
If you are creating the object with code, you can set the tag:
button.tag = kStartButton;
// or
[button setTag:kStartButton];

Answer 4

You must declare first UITextFieldDelegate in your controller .h
And set the delegate of your text field. ex. myInput.delegate = self;
-(void)textFieldDidBeginEditing:(UITextField *)sender
{
if ([sender isEqual:myInput])
{
NSLog(#"test");
}
}
This works perfectly for me.

Answer 5

Have you checked if your second textViews delegate is set to self ? I had the same issue where I had forgotten to set the delegate of other textFields and hence the delegate method was not firing.

Answer 6

Please have a look to my answer in this Question, it's exactly what you're looking for
Objective C: what is a "(id) sender"?