Array-Exchange array element display error: Also accessed, but modifications require exclusive access

swap(&(self.profileImages[0]), &( self.profileImages[2]))

self.profileImages.swapAt(0, 2)

I want to swap my array elements:

swap(&(self.profileImages[0]), &(self.profileImages[2]) )

But I get this error:

Simultaneous accesses to 0x102944a80, but modification requires exclusive access

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After a lot of searching: As described by Whats-new-in-Swift-4, I found that in swift4 I should use this code:

self.profileImages.swapAt(0, 2)