Is the following true:
weak = unsafe_unretain = assign
strong = retain
If it is why they are duplicated ? Which one should we choose?
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Is the following true:
weak = unsafe_unretain = assign
strong = retain
If it is why they are duplicated ? Which one should we choose?
No, it’s not true.
weakmeans that the object is not retained, and additionally, the variable/property will automatically be set to nil when the object is deallocated.unsafe_unretainedmeans the object is not retained, but there is no automatic zeroing.strongandretainare equivalent.