Database Reference
In-Depth Information
For the purposes of this app, you don't care about the content of each individual
sale—for example, the date of the sale or the name of the purchaser—just how
many there are.
Measure the problem
You'll use XCTest again to measure the performance of the employee detail screen.
Open
EmployeeDetailViewController.swift
and find
salesCountForEmployee(employee:)
.
public
func
salesCountForEmployee(employee:
Employee
) ->
String
{
let
fetchRequest =
NSFetchRequest
(entityName:
"Sale"
)
let
predicate =
NSPredicate
(format:
"employee == %@"
, employee)
fetchRequest.
predicate
= predicate
var
error :
NSError
?
let
context = employee.
managedObjectContext
let
results =
context.
executeFetchRequest
(fetchRequest, error: &error)
if
results ==
nil
{
println
(
"Error:
\(error?.
localizedDescription
)
"
)
return
"0"
}
return
"
\(results.
count
)
"
}
