/* |
File: MyViewController.m |
Abstract: A controller for a single page of content. For this application, pages simply display text on a colored background. The colors are retrieved from a static color list. |
Version: 1.3 |
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*/ |
#import "MyViewController.h" |
static NSArray *__pageControlColorList = nil; |
@implementation MyViewController |
@synthesize pageNumberLabel; |
// Creates the color list the first time this method is invoked. Returns one color object from the list. |
+ (UIColor *)pageControlColorWithIndex:(NSUInteger)index { |
if (__pageControlColorList == nil) { |
__pageControlColorList = [[NSArray alloc] initWithObjects:[UIColor redColor], [UIColor greenColor], [UIColor magentaColor], |
[UIColor blueColor], [UIColor orangeColor], [UIColor brownColor], [UIColor grayColor], nil]; |
} |
// Mod the index by the list length to ensure access remains in bounds. |
return [__pageControlColorList objectAtIndex:index % [__pageControlColorList count]]; |
} |
// Load the view nib and initialize the pageNumber ivar. |
- (id)initWithPageNumber:(int)page { |
if (self = [super initWithNibName:@"MyView" bundle:nil]) { |
pageNumber = page; |
} |
return self; |
} |
- (void)dealloc { |
[pageNumberLabel release]; |
[super dealloc]; |
} |
// Set the label and background color when the view has finished loading. |
- (void)viewDidLoad { |
pageNumberLabel.text = [NSString stringWithFormat:@"Page %d", pageNumber + 1]; |
self.view.backgroundColor = [MyViewController pageControlColorWithIndex:pageNumber]; |
} |
@end |
Last updated: 2010-06-23