ios - UIWindow in Xcode 6 templates -

I have a simple question, why is the main (and only UI window) on all Apple templates in Excel, instead of Var Let's go.

  var window: UIWindow?  

As I understand, we should use it wherever possible, and especially where this matter will not change.

Even with the use of commodities, you still have your qualities (frames etc.).

I have some difficulty using the object (class type) to go with.

I assumed something like CLLocationManager and UIWindow would be the perfect example of using when to use objects, but the applet in their code Do not use to go.

property with keyword properties defined by the time the object is started The window is not created during the initial time, so it can not be a walk.

This is the only condition for viewers controlling - outlets, or indeed any of the visual properties, because they are not initially present, but when the scene is required, then Is created later.

let properties really do not work well to see UIKit and controllers - From the design, see the controllers do not do much work initially, and you only set Up at that point you are absolutely right that the properties will be great for properties like a place manager or managed object context, but as it turns out to be lazy var Better bet is

Swift experience, let attributes are great for creating an irreversible model class, and local let s are the default code in my reference (like, limited to everyone!) For making.

You can use properties and define them there, so for a location manager:

  Manage location = CLLocationManager ()  

What information do you need to make whatever is happening in the property, if it can be made from scratch without any reference, then it is like the above example if a representative or There is a need to pass in another property, Programming you might want to set the make it or initialization, so no fair.