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POUIView and UIViewController practice for inheritance
 

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    <p>I was just wondering if this approach looks like a good practice for apps with a lot of custom views, for nested PNG graphics and animations that may change based on user interaction. I created a BaseView class that extends UIView</p> <pre><code>@interface BaseView : UIView { @protected BaseViewController *controller; } @property (retain) BaseViewController *controller; @end </code></pre> <p>and a corresponding controller class which is the primary location which I am putting code to manipulate the view</p> <pre><code>@interface BaseViewController : UIViewController { @protected CGRect drawArea; } - (void) drawArea:(CGRect) _drawArea; - (CGRect) drawArea; - (void) linkSubviewController: (BaseViewController *) _subviewController; @end </code></pre> <p>where "drawArea" is the CGRect used to pass to the view as a frame.</p> <p>"linkSubviewController" allows you to nest a controller and view as follows :</p> <pre><code>- (void) linkSubviewController: (BaseViewController *) _subviewController { [self.view addSubview:[_subviewController view]]; } </code></pre> <p>In addition I layered another custom pair called "ImageView" and "ImageViewController" which extend BaseView but also store a UIImage and an x,y,w,h</p> <p>In the "drawRect" drawing methods on views I can check to see if any vars in the self.controller vars have been changed, or assign images, for example :</p> <pre><code>UIImage *image = [(ImageViewController *)self.controller image]; CGContextDrawImage( ... ) etc </code></pre> <p>I write most of the loadView methods something like this</p> <pre><code>- (void)loadView { ImageView *v = [[ImageView new] initWithFrame:drawArea]; v.controller = self; self.view = v; } </code></pre> <p>The base "initWithFrame" routine contains</p> <pre><code> self.backgroundColor = [UIColor clearColor]; self.opaque = NO; </code></pre> <p>So I can load a variety of images with transparent backgrounds without having to assign that each time.</p> <p>I've been able to use this code throughout my app and it seems to make it easy to write a top level class which assembles the layout of custom items. For animations I've been putting them in the controllers and manipulating self.view.layer.</p> <p>Basically I am looking for feedback, I am new with Objective-C and the IPhone SDK</p>
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