What is meaning of 'retain' keyword?
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What is the meaning of 'strong'keyword?
Which devices will this work with ios?
. Why an app on iOS device behaves differently when running in foreground than in background?
Difference between nil and Nil.
What is the purpose of using ibaction and iboutlet?
Why do you generally create a weak reference when using self in a block?
When can you get ios 13?
What is array in ios?
what are the two different smart groups in Xcode?
Why do we override drawrect: method?
Explain application sandboxing.
How do you create a fetched property?