cannot use ButtonRow title in condition

[ageorgios]

            $0.hidden = .Function(["login"], { form -> Bool in
                let row: ButtonRow! = form.rowByTag("login")
                return row.title == "Register"   <- this returns EXC_BAD_INSTRUCTION
            })

When trying the above code, i resulted in EXC_BAD_INSTRUCTION

[mtnbarreto]

@ageorgios
Apparently "login" row was not added yet when the hidden condition is first evaluated. This happens right after the row that has a the hidden property is added to its section. At this time form.rowByTag("login") return nil and row.title throws an Exception.

When the dependent row is added, in this case "login" row, the condition is re-evaluated and form.rowByTag("login") returns it.

So you should replace the code by:

 $0.hidden = .Function(["login"], { form -> Bool in
                let: row: ButtonRow? = form.rowByTag("login") 
                return row?.title == "Register"
            })