Is there any way to observe changes to the selectedTextRange of a UITextField?
I tried observing all UIControlEvents. But changing the selectedTextRange does not trigger a UIControlEvent.
Another dead end -- UIKit classes are not KVO compliant.
Then there is the UITextFieldTextDidChangeNotification. But that's for changes to the text.
Any ideas?
Subclass UITextField as follows.
@interface WJTextField : UITextField @end @protocol WJTextFieldDelegate <UITextFieldDelegate> - (void) textFieldDidChangeSelection: (UITextField *) textField; @end Implementation:
@implementation WJTextField - (void) setSelectedTextRange: (UITextRange *) selectedTextRange { [super setSelectedTextRange: selectedTextRange]; if ([self.delegate respondsToSelector: @selector(textFieldDidChangeSelection:)]) [(id <WJTextFieldDelegate>) self.delegate textFieldDidChangeSelection: self]; } @end Then add -textFieldDidChangeSelection: to your text field's delegate.
Caveat: This delegate message will be sent only when the cursor is moved, it will not be sent when typing or pasting text, for those events you have to implement textField:shouldChangeCharactersInRange:replacementString:, where the selection range is going to either be set to range.location + [string length] (if you return YES) or remain the same (if you return NO).