How did Viber customize the keyboard in their iOS app?
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What part of the iOS SDK are they using?
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Answer:
I presume they are intercepting the messages that would bring up the standard keyboard and are bringing up theirs instead. This is highly prone to breaking, since I presume the whole process isn't documented, so I think they have to be reverse engineering things, which can break on further changes (of course those changes typically don't break anyone using the standard APIs as designed).
Matt Ackeret at Quora Visit the source
Other answers
They must have appended a view on top of the keyboard and customised that view!
Anonymous
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