Swift 3 Core Data - NSExpression combine multiple functions

Asked Oct 08 '17 at 07:00

Active Oct 08 '17 at 07:00

Viewed 356 times

I need this expression --> sum:(abs:(amount) * -1)

and my code is:

let absExpression = NSExpression(forFunction: "abs:", arguments: [NSExpression(forKeyPath: Table.COLUMN_AMOUNT)])
let minusAbsExpression = NSExpression(format: "%@ * -1", argumentArray: [absExpression])
let trueExpression = NSExpression(forFunction: "sum:", arguments: [minusAbsExpression])

but crash with down reason:

reason: 'Unsupported function expression sum:(abs:(amount) * -1)'

asked Oct 08 '17 at 07:00

Farzad Rohani

Where it is crashing in the third line or in any other code which is not here? – Vini App Oct 08 '17 at 19:03
In line 3 @ViniApp – Farzad Rohani Oct 12 '17 at 05:50

Swift 3 Core Data - NSExpression combine multiple functions

0 Answers0