what is Xcode command line tools package?
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What is the 'implementation'?
What are kvo and kvc?
Why do all model object attributes get marked with @dynamic and not synthesised?
Tell me the hierarchy of uibutton.
What is atomic and non atomic in ios?
What is auto-layout?
Is ios 9 still supported by apple?
Explain the usage of struct?
Explain ~/documents, ~/library, ~/tmp. What directory is ~ on ios?
Is it safe to update to ios 13?
Explain mutable and immutable types in objective c programming language?
How can we achieve singleton pattern in iOS?