How can I send a "UIControlEventValueChanged" event from my custom control?

ios objective-c uicontrolevents target-action
Christian Gossain picture Christian Gossain · Jun 30, 2013 · Viewed 12.5k times · Source

I've created a custom picker view type of control by subclassing UIView. I would like to be able to send a "UIControlEventValueChanged" control event from within this control, so that I can register for it in whichever view controller is using the control.

How can I can I get my custom control to trigger this event when I deem it should be triggered?

Answer

rmaddy picture rmaddy · Jun 30, 2013

Assuming your custom control extends UIControl, then you simply do:

[self sendActionsForControlEvents:UIControlEventValueChanged];

This will call all registered targets (via addTarget:action:forControlEvents: that this event has happened.

Use this function where you deem should trigger a value has changed

Related questions

Passing parameters to addTarget:action:forControlEvents

I am using addTarget:action:forControlEvents like this: [newsButton addTarget:self action:@selector(switchToNewsDetails) forControlEvents:UIControlEventTouchUpInside];

Read More
How to link to apps on the app store

I am creating a free version of my iPhone game. I want to have a button inside the free version that takes people to the paid version in the app store. If I use a standard link http://itunes.apple.…

Read More
How can I make a UITextField move up when the keyboard is present - on starting to edit?

With the iOS SDK: I have a UIView with UITextFields that bring up a keyboard. I need it to be able to: Allow scrolling of the contents of the UIScrollView to see the other text fields once the keyboard is …

Read More