iOS PageView help. Button actions vs. button creation - ios

Question

So I hired someone on freelancer to build me a pageview, and it looked like what I wanted, but now Idk how to configure the code. Can anyone just tell me where the buttons are being built and where the actions to each button are?
ViewController.m
- (ColorViewController *)viewControllerAtIndex:(NSUInteger)index {
if (([colorsArray count] == 0) || (index >= [colorsArray count])) {
return nil;
}
NSArray *arr = [colorsArray objectAtIndex:index];
ColorViewController *dataViewController =[[ColorViewController alloc] initWithColorsArray:arr];
dataViewController.delegate = self;
return dataViewController;
}
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(ColorViewController *)viewController
{
int index = [self indexOfViewController:viewController];
pagecontrol.currentPage = index;
if(index == 0){
return nil;
}
return [self viewControllerAtIndex:index-1];
}
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(ColorViewController *)viewController
{
int index = [self indexOfViewController:viewController];
pagecontrol.currentPage = index;
if(index >= [colorsArray count]-1){
return nil;
}
return [self viewControllerAtIndex:index+1];
}
- (NSUInteger)indexOfViewController:(ColorViewController *)viewController {
return [colorsArray indexOfObject:viewController.colorsArray];
}
-(void) pageChanged:(id) sender
{
}
-(void) setColor:(UIColor *)color
{
[myLabel setTextColor:color];
_fontColorView.hidden = YES;
}
-(void) setupColorViewControllers
{
NSDictionary *options =[NSDictionary dictionaryWithObject:[NSNumber numberWithInteger:UIPageViewControllerSpineLocationMin]
forKey: UIPageViewControllerOptionSpineLocationKey];
pagevc = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:options];
pagevc.view.frame = CGRectMake(0, 414, 320, 200);
pagevc.delegate = self;
pagevc.dataSource = self;
[self.view addSubview:pagevc.view];
NSArray *c1arr = [NSArray arrayWithObjects:[UIColor redColor],
[UIColor blackColor],
[UIColor grayColor],
[UIColor blueColor],
[UIColor redColor],
[UIColor darkGrayColor],
[UIColor yellowColor],
[UIColor purpleColor],
[UIColor greenColor],
nil];
ColorViewController *c1 = [[ColorViewController alloc] initWithColorsArray:c1arr];
c1.delegate = self;
NSArray *c2arr = [NSArray arrayWithObjects:[UIColor whiteColor],
[UIColor redColor],
[UIColor blackColor],
[UIColor grayColor],
[UIColor darkGrayColor],
[UIColor purpleColor],
[UIColor yellowColor],
[UIColor blueColor],
[UIColor greenColor],
nil];
NSArray *c3arr = [NSArray arrayWithObjects:
[UIColor greenColor],
[UIColor blackColor],
[UIColor darkGrayColor],
[UIColor grayColor],
[UIColor whiteColor],
[UIColor purpleColor],
[UIColor yellowColor],
[UIColor blueColor],
[UIColor redColor],
nil];
colorsArray = [NSArray arrayWithObjects:c1arr, c2arr, c3arr, nil];
colorsViewControllers = [NSArray arrayWithObjects:c1, nil];
pagecontrol = [[UIPageControl alloc] initWithFrame:CGRectMake(110, 150, 80, 30)];
pagecontrol.layer.cornerRadius = 4;
[pagecontrol setBackgroundColor:[UIColor colorWithRed:0.8 green:0.8 blue:0.8 alpha:0.8]];
[pagecontrol setPageIndicatorTintColor:[UIColor purpleColor]];
pagecontrol.numberOfPages = 3;
pagecontrol.currentPage = 0;
[pagecontrol addTarget:self action:#selector(pageChanged:) forControlEvents:UIControlEventValueChanged];
[pagevc.view addSubview:pagecontrol];
[pagevc setViewControllers:colorsViewControllers direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:^(BOOL finished) {
;
}];
pagevc.view.hidden = YES;
_fontColorView = pagevc.view;
}
ColorViewController.m
#import "ColorViewController.h"
#interface ColorViewController ()
#end
#implementation ColorViewController
#synthesize colorsArray;
#synthesize delegate;
-(void) setColorsArray:(NSArray*) arr
{
colorsArray = arr;
int min = [arr count] > [buttonsArray count] ? [buttonsArray count] : [arr count];
for(int i = 0; i < min; i++){
UIColor *color = [colorsArray objectAtIndex:i];
UIButton *b = [buttonsArray objectAtIndex:i];
[b setBackgroundColor:color];
}
}
-(id) initWithColorsArray:(NSArray*) arr
{
self = [super init];
if(self){
colorsArray = arr;
}
return self;
}
-(void) color:(id) sender
{
UIButton *b = (UIButton*) sender;
[delegate setColor:b.backgroundColor];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
buttonsArray = [[NSMutableArray alloc] init];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
int x = 10, y = 10;
int size = [colorsArray count] > 10 ? 10 : [colorsArray count];
for(int i = 0; i < size; i++){
UIColor *color = [colorsArray objectAtIndex:i];
UIButton *b = [UIButton buttonWithType:UIButtonTypeCustom];
[b setBackgroundColor:color];
[b addTarget:self action:#selector(color:) forControlEvents:UIControlEventTouchUpInside];
b.frame = CGRectMake(x , y , 50, 50);
x += 60;
if(i == 4){
y += 60;
x = 10;
}
[buttonsArray addObject:b];
[self.view addSubview:b];
}
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
#end

Answer 1

The buttons are being instantiated in ViewDidLoad within the ColorViewController class. A button is created for every color in colorsArray
for(int i = 0; i < size; i++){
UIColor *color = [colorsArray objectAtIndex:i];
UIButton *b = [UIButton buttonWithType:UIButtonTypeCustom];
and then each of the buttons is given the selector "color:" for the touchUpInside event, meaning that when the button is pressed and released, it will call the method "color" within the same class.
[b addTarget:self action:#selector(color:) forControlEvents:UIControlEventTouchUpInside];
The "colors:" method checks which button was pressed and then sets the background color of the delegate class to the background color of the button
UIButton *b = (UIButton*) sender;
[delegate setColor:b.backgroundColor];