What is singleton in ios swift?
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How to start a thread?
What is nsmanagedobjectcontext? What are the different concurrency types?
What is the mean of not running state in ios?
What is UITableView?
What is delegation pattern in ios?
Can apk files run on ios?
What is the difference between 'assign' and 'retain' keyword?
Is core data is thread safe?
What are properties in ios?
What manual memory management ? How it work?
Explain keywords alloc and new?
What is the use of controller object UIApplication?