What are layer objects and what do they represent in iOS operating system?


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More Apple iOS Interview Questions

What is gcd? How is it used?

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Who developed ios?

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What is difference strong and weak reference ? Explain.

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Explain the options and bars available in xcode 4.x workspace window in iOS operating system

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Why do we override drawrect: method? How to explicitly call it?

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What is core data in ios swift?

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Explain how app delegate is declared by Xcode project templates?

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What are the different store migration options?

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Define 'retain' keyword?

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What is the meaning of 'strong'keyword?

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What do you know about the ios kernel?

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What is nsmanagedobject?

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