Explain the difference between viewdidload and viewdidappear?
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What is a background thread?
What is @dynamic in objective-c ?
What is a category and when is it used?
Outline the class hierarchy for a UIButton until NSObject.
What is nspersistentstorecoordinator? What duties does it perform?
What is notification in iOS?
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Explain UIView life cycles
What is the benefit of setting reuseidentifier to a non-nil value?
Name the app sate which it reaches briefly on its way to being suspended in iOS operating system?
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Suppose I get a “blog returned invalid data” error message. What do I do?
What is latest mac os version?
What is nslayoutanchor?