iOS development empty array correct method

Nsarray and Nsmutablearray are two arrays in OBJC (immutable and mutable arrays),
In the daily development, often encounter the need to empty the array of circumstances, many people subconsciously think of nil This method, here is not advocated. Because if array = = nil is used, not only does the array be emptied, but also the memory is freed, and the object does not exist.
Never do this when you empty an array.

The right approach is to use removeallobjects; So you can get the results you want.

Using nil will delete the entire array, and using removeallobjects simply deletes the elements in the array:

[Nsarray removeallobjects];

iOS development empty array correct method