Using UIScrollView in a window-based app - IS IT POSSIBLE?

Question

sorry for noob question but i am very new and only 12 years old so i am very new. I am making an app that involves scrollviews but i want to use window based app so i can use the window setHidden piece of code instead of messing around with view controllers.
My Question:
How can I implement a scroll view into the app delegate .m since there is obviously no ViewDidLoad feature. Do I just make the IBOutlet in the .H file but what to do in the .M file to get the "scrollview ScrollEnable:YES" and the CGSize parameters in without causing a massive error?

Answer 1

Hi Tom, and welcome to the Dev Forums!
tomgoodenough wrote:
sorry for noob question but i am very new
This forum is for developers of all levels, including future developers and has-beens. Beginners are especially welcome.
i want to use window based app so i can use the window setHidden piece of code instead of messing around with view controllers.
I don't know why you'd want to hide your main window, but in any case, a view controller wouldn't prevent you from doing that. View controllers do all kinds of good things behind the scenes and catch lots of useful messages, which is why they're almost always recommended for any full-screen view--even in the simplest possible project (see [Overview|http://developer.apple.com/library/ios/#documentation/UIKit/Reference /UIViewControllerClass/Reference/Reference.html%23//appleref/occ/cl/UIViewController] in the UIViewController Class Reference). That said, making iOS apps without any view controllers will be an excellent way for you to learn what they do for you, so onward and upward!
How can I implement a scroll view into the app delegate .m ... Do I just make the IBOutlet in the .H file but what to do in the .M file to get the "scrollview ScrollEnable:YES" and the CGSize parameters ...?
Yes, assuming a UIScrollView object has been added to MainWindow.xib, make an IBOutlet ivar and @property for your scroll view in the @interface (MyAppDelegate.h) of your app delegate, and connect that outlet to the scroll view in IB. Then add the scroll view to the window and set its properties in the [applicationDidFinishLaunching:|http://developer.apple.com/library/ios/#documen tation/UIKit/Reference/UIApplicationDelegateProtocol/Reference/Reference.html%23//appleref/doc/uid/TP40006786] method of the @implementation (MyAppDelegate.m). Don't forget to set the [contentSize|http://developer.apple.com/library/ios/#documentation/UIKit/Refere nce/UIScrollViewClass/Reference/UIScrollView.html%23//appleref/doc/uid/TP40006922] property of the scroll view to the size of the view it will scroll. The view won't scroll unless contentSize is higher and/or wider than the scroll view frame.
... there is obviously no ViewDidLoad feature. ...
There's no reason your app delegate class needs to be a direct subclass of NSObject. It can just as easily be a subclass of UIViewController. In that case you could override viewDidLoad, or any of the other useful view controller methods in the app delegate @implementation. Just change the superclass from NSObject to UIViewController in the first line of the @interface, and connect the 'view' outlet of the app delegate to the scroll view object in IB.
\- Ray