What is nsobject in ios?
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Why uicontrol is provided if we can create custom uiview?
What is iphone screen size?
What is the purpose of reuseidentifier?
Which language is used in ios?
What are layer objects and what do they represent in iOS operating system?
What is inactive state in ios?
Explain layer objects?
What is the difference between copies & retain in iOS operating system?
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How can mobile application errors be prevented?
How many types of background modes supported in ios?
What is the use of appdelegate in ios?
What is @synthesize in objective-c ?