Database Reference
In-Depth Information
if
let
imageView =
employeePictureImageView
{
imageView.image =
UIImage
(data: employee.picture)
}
This time, you want to use the high-quality version of the picture, since the image
will be shown full-screen. Update the file to use the
picture
relationship you
created on the
Employee
entity to access the high-quality version of the picture:
if
let
imageView =
employeePictureImageView
{
imageView.
image
=
UIImage
(data: employee.
picture
.
picture
)
}
There's one more thing to do before you build and run. Open
AppDelegate.swift
and find the following line of code in
importJSONSeedData()
:
employee.picture = pictureData
Now that you have a separate entity for storing the high-quality picture, you need
to update this line of code to set the
pictureThumbnail
attribute and the
picture
relationship. Replace the line above with the following:
employee.
pictureThumbnail
=
imageDataScaledToHeight
(pictureData, height:
120
)
let
employeePictureEntity =
NSEntityDescription
.
entityForName
(
"EmployeePicture"
,
inManagedObjectContext:
coreDataStack
.
context
)
let
pictureObject =
EmployeePicture
(entity: employeePictureEntity!,
insertIntoManagedObjectContext:
coreDataStack
.
context
)
pictureObject.
picture
= pictureData
employee.
picture
= pictureObject
First, you use
imageDataScaledToHeight
to set the
pictureThumbnail
to a smaller
version of the original picture. Next, you create a new
picture
entity using the
EmployeePicture
entity description.
You set the
picture
attributed on the new
EmployeePicture
entity to the
pictureData
constant. Finally, you set the
picture
relationship on the
employee
entity to the just-created
picture
entity.
Note:
imageDataScaledToHeight
takes in image data, resizes it to the passed-
in height and sets the quality to 80% before returning the new image data.
