eric e. dolecki

#import "ClickThroughViewController.h"
#import <quartzcore/quartzcore.h>

@implementation ClickThroughViewController
@synthesize imageView, imageViewTop, aboutView, aboutButton, advanceButton, backButton, label;

- (void)updateLabel {
NSString *c = [[NSString alloc] initWithFormat:@"%i", count];
label.text = c;
[c release];
}

/*
You need to make sure the prototype images that you use are JPGs
and use the "image_" convention, otherwise the total count will
be off and your application will bork.
*/
- (void)viewDidLoad {
UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image_1.jpg" ofType:nil]];
UIImage *img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image_6.jpg" ofType:nil]];
imageView.image = img2;
imageViewTop.image = img;
imageView.hidden = YES;
totalCount = 0;
aboutShowing = NO;

NSArray *d = [[NSBundle mainBundle] pathsForResourcesOfType:@"jpg" inDirectory:nil];
for(NSString *s in d){
 if([[s lastPathComponent] hasPrefix:@"image_"]){
  totalCount++;
 }
}
count = 1;
prev = totalCount;
label.alpha = 0;
[self updateLabel];
   [super viewDidLoad];
}

- (void)didReceiveMemoryWarning {
   [super didReceiveMemoryWarning];
}

- (void)dealloc {
[imageView release];
[backButton release];
[advanceButton release];
   [super dealloc];
}

// #pragma isn't very cool in my opinion, so...
//MARK: Custom Code

- (IBAction)advanceImage:(id)sender {
count++;
if( count > totalCount ){
 count = 1;
}
if( count == 1 ){
 prev = totalCount;
} else {
 prev = count - 1;
}
[self updateLabel];

NSString *tmp = [[NSString alloc] initWithFormat:@"image_%i", count];
NSString *old = [[NSString alloc] initWithFormat:@"image_%i", prev];
UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:tmp ofType:@"jpg"]];
UIImage *img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:old ofType:@"jpg"]];

imageView.image = img2;
imageViewTop.image = img;
label.alpha = 1;

CGContextRef context = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft forView:[self imageViewTop] cache:YES];
[UIView setAnimationDuration:0.5];
[UIView commitAnimations];

CGContextRef context2 = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context2];
[UIView setAnimationDuration:1.0];
label.alpha = 0;
[UIView commitAnimations];
}

- (IBAction)aboutChange:(id)sender {
if( !aboutShowing ){
 aboutShowing = YES;
 aboutView.hidden = NO;
 aboutView.frame = CGRectMake(0, -50, 320, 480);
 aboutView.alpha = 0.0;
 CGContextRef context = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context];
 [UIView setAnimationDuration:1.0];
 aboutView.frame = CGRectMake(0, 0, 320, 480);
 aboutView.alpha = 1.0;
 [UIView commitAnimations];

} else {
 aboutShowing = NO; 
 CGContextRef context2 = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context2];
 [UIView setAnimationDuration:1.0];
 aboutView.frame = CGRectMake(0, -50, 320, 480);
 aboutView.alpha = 0.0;
 [UIView commitAnimations];
}
}

- (IBAction)backImage:(id)sender {
 count--;
 if( count < 1 ){
  count = totalCount;
 }
 if( count == 1 ){
  prev = totalCount;
 } else {
  prev = count + 1;
 }
 [self updateLabel];
 NSString *tmp = [[NSString alloc] initWithFormat:@"image_%i", count];
 NSString *old = [[NSString alloc] initWithFormat:@"image_%i", prev];
 UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:tmp ofType:@"jpg"]];
 UIImage *img2 = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:old ofType:@"jpg"]];
 imageView.image = img2;
 imageViewTop.image = img;
 label.alpha = 1;
 
 CGContextRef context = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context];
 [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:[self imageViewTop] cache:YES];
 [UIView setAnimationDuration:0.5];
 [UIView commitAnimations];
 
 CGContextRef context2 = UIGraphicsGetCurrentContext();
 [UIView beginAnimations:nil context:context2];
 [UIView setAnimationDuration:1.0];
 label.alpha = 0;
 [UIView commitAnimations];
}

@end

Labels: iPhone, Objective-C, Xcode