表达太复杂，无法在合理的时间内解决Swift 3

I am trying to convert my project to Swift 3, but I am getting an error message that the expression is too complex to be solved in reasonable time. I am not sure why this is, since this expression was working fine in Swift 2.2, but now all of a sudden it is taking so long?I am trying to convert my project to Swift 3, b