iOS: UITextField not able to load -

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i have simple viewcontroller uitextfield. hooked iboutlet. however, while loading, keep getting following error, 

[uitextfield isequaltostring:]: unrecognized selector sent instance 0x9860ad0

i not using variable in source code @ all. not sure whats going wrong.
can me?

make sure name of uitextfield not coincide other ivar in class. also, if comparing uitextfield's text value something, might have missed write uitextfield.text


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