CODEWITHSUNDEEP
xamarin.ios
Joe Longo
Joe Longo

Reputation: 1

MonoTouch: How can I monitor the keyboard and determine KeyPress events?

How can I monitor the keyboard and determine KeyPress events ?

Upvotes: 0

Views: 2096

Answers (2)

Yiannis Mpourkelis
Yiannis Mpourkelis

Reputation: 1386

The ShouldChangeCharacters of UITextField is called BEFORE the text is changed and it is not the same as the Changed event of UITextView. This means that getting the text on the ShouldChangeCharacters or ShouldChangeText method, will allways return the text BEFORE the last key was pressed.

The UITextView has a Changed event like the KeyPress event. UITextField has not such event yet.

A workaround for the UITextField can be found here: bugzilla.xamarin.com/show_bug.cgi?id=864 

NSNotificationCenter.DefaultCenter.AddObserver

(UITextField.TextFieldTextDidChangeNotification, (notification) => { Console.WriteLine ("Character received! {0}", notification.Object == TextField); });

Upvotes: 1

Andrew Young
Andrew Young

Reputation: 1779

If you want to monitor key press events for UITextView, then override the UITextViewDelegate's ShouldChangeText() method.

If you want to monitor key press events for UITextField, there's a similar method in UITextFieldDelegate called ShouldChangeCharacters().

Find more info on the usage of these methods here and here.

Upvotes: 2

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