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IOS Technical Test MCQs

You are developing an application for iOS in Xcode 4.x. Which of the following options will check if a text field with id "TextField" is empty or not, and displaying it in a label with the id "Output"?

if(TextField.text == NULL) { Output.text=TextField.text; }

if(TextField.length == 0) { Output.text=TextField.text; }

if(TextField.text == @"") { Output.text=TextField.text; }

if(TextField.text.length == 0) { Output.text=TextField.text; }

Answer

Correct Answer: if(TextField.text.length == 0) { Output.text=TextField.text; }

Explanation:

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