UiTextField events

Question

When I create UITextField inside Interface Builder, I can access Events tab for it, which has events like Value changed, Touch cancel, Touch drag, etc. I can assign my own methods to every of those events. How can I do the same, when I create UITextField programmatically with alloc?

Hi, I've created a UITextField in Interface Builder and want to register UIControlEventValueChanged. How do you go about it? How do you define that function? — Namratha, Feb 11 '11 at 07:04

falconcreek · Accepted Answer · 2012-10-21T10:58:28.553

14

Refer to Apple documentation for UIControl. After initializing your textField, call addTarget:action:forControlEvents:

example for the touch event ending an edit session

[textField addTarget:self action:@selector(handleTouchValueChanged:) forControlEvents: UIControlEventEditingDidEnd]

edited Oct 21 '12 at 10:58

answered Apr 07 '10 at 17:20

falconcreek

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This doesn't work, you need to use UIControlEventEditingChanged – Chris Garrett Jan 27 '12 at 00:28

score 11 · Answer 2 · edited Jan 18 '17 at 06:35

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Instead of UIControlEventValueChanged, you should use UIControlEventEditingChanged:

[_titleTextField addTarget:self action:@selector(handleTitleValueChanged:) forControlEvents:UIControlEventEditingChanged];

edited Jan 18 '17 at 06:35

Cristik

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answered Jan 17 '11 at 08:09

Baryon Lee

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from hajikelist's answer (belongs here as a comment instead of being an answer itself): UIControlEventEditingChanged fires whenever user changes value [synchronous with typing or keyup] which could cause extra hits to your data handler routine, if you're saving values based on that event, expecting it to be some kind of final value from user input...(you could end up with unexpected behavior, like having multiple saves for each textfield.) – GeneralMike Oct 31 '12 at 20:07

score 3 · Answer 3 · edited Jun 30 '11 at 20:33

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UIControlEventEditingChanged fires whenever user changes value [synchronous with typing or keyup] which could cause extra hits to your data handler routine, if you're saving values based on that event, expecting it to be some kind of final value from user input...

edited Jun 30 '11 at 20:33

axel22

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answered Jun 30 '11 at 07:00

hajikelist

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A good point, but should probably be a comment under one of the other answers instead of an answer itself, since you didn't specify an alternative to those answers. – GeneralMike Oct 31 '12 at 20:04

UiTextField events

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