UITextField's implementation of UITextInput protocol

Number:rdar://19263531 Date Originated:15 Dec 2014
Status:Open Resolved:
Product:iOS Product Version:8.1.2 (12B440)
Classification:Other Bug Reproducible:Always
UITextField's header states that it is implementing the UITextInput protocol. However this is only partially true.

Our tests show that -deleteBackward and -replaceRange:withText: are not called on subclasses of UITextField. Only -insertText from UIKeyInput is being called.

This is an inconsistency that confuses developers requiring subclassing of UITextField.

Steps to Reproduce:
- Subclass UITextField
- override -deleteBackward
- set a breakpoint there
- use this subclass in an app

Expected Results:
- When the user hits the backspace key the -deleteBackward method should be called.
- When the user inserts or replaces ranges of text, the -replaceRange:withText: method should be called

Actual Results:
- -deleteBackward is not called
- -replaceRange:withText is not called


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