How nsoperationque works?
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Does ios support multitasking?
what is the use of PO command in Xcode?
How to switch off predictive text?
When an app is said to be in active state?
What are ios apps coded in?
What is the meaning of 'synthesize' keyword?
In mapKit frame work, how to get current user location
What is mapping model?
What are layer objects and what do they represent?
Explain @synchronized ,@dynamic
What are the different store migration options? How do they work?
Explain application sandboxing.