Load array of images into slider in IOS - ios

Question

I have used a slider from this in my project.
In this slider they are using static images to pass to the slider and these images are visible in slider. But i have array of images coming from service, i passed this array to the slider, the slider works fine but it does not show images in the slider. I'm confused that why it is not displaying it. My code for slider is,
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
NSArray *arrayOfImages = [userDefaults objectForKey:#"property_images"];
NSLog(#"GGG %#",arrayOfImages);
//self.imagesData=[[NSArray alloc]init];
self.imagesData = arrayOfImages; //[_Image1 mutableCopy]; //#[#"image1.jpg", #"image2.jpg", #"image3.jpg"];
NSLog(#"Image Array is %#",_imagesData);
for(int i=0; i<self.imagesData.count;i++){
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(CGRectGetWidth(self.view.frame) * i, 0, CGRectGetWidth(self.view.frame), CGRectGetHeight(self.scrollView.frame))];
imageView.contentMode = UIViewContentModeScaleAspectFill;
imageView.image = [UIImage imageNamed:[self.imagesData objectAtIndex:i]];
[self.scrollView addSubview:imageView];
}
self.scrollView.delegate = self;
index=0;
// Progammatically init a TAPageControl with a custom dot view.
self.customPageControl2 = [[TAPageControl alloc] initWithFrame:CGRectMake(20,self.scrollView.frame.origin.y+self.scrollView.frame.size.height,self.scrollView.frame.size.width,40)];//CGRectMake(0, CGRectGetMaxY(self.scrollView.frame) - 100, CGRectGetWidth(self.scrollView.frame), 40)
// Example for touch bullet event
self.customPageControl2.delegate = self;
self.customPageControl2.numberOfPages = self.imagesData.count;
self.customPageControl2.dotSize = CGSizeMake(20, 20);
self.scrollView.contentSize = CGSizeMake(CGRectGetWidth(self.view.frame) * self.imagesData.count, CGRectGetHeight(self.scrollView.frame));
[self.view addSubview:self.customPageControl2];
and further functions of slider are this,
-(void)viewDidAppear:(BOOL)animated{
timer=[NSTimer scheduledTimerWithTimeInterval:3 target:self selector:#selector(runImages) userInfo:nil repeats:YES];
}
-(void)viewDidDisappear:(BOOL)animated{
if (timer) {
[timer invalidate];
timer=nil;
}
}
-(void)runImages{
self.customPageControl2.currentPage=index;
if (index==self.imagesData.count-1) {
index=0;
}else{
index++;
}
[self TAPageControl:self.customPageControl2 didSelectPageAtIndex:index];
}
- (void)viewDidLayoutSubviews
{
[super viewDidLayoutSubviews];
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
NSInteger pageIndex = scrollView.contentOffset.x / CGRectGetWidth(scrollView.frame);
self.customPageControl2.currentPage = pageIndex;
index=pageIndex;
}
// Example of use of delegate for second scroll view to respond to bullet touch event
- (void)TAPageControl:(TAPageControl *)pageControl didSelectPageAtIndex:
(NSInteger)currentIndex
{
index=currentIndex;
[self.scrollView scrollRectToVisible:CGRectMake(CGRectGetWidth(self.view.frame) * currentIndex, 0, CGRectGetWidth(self.view.frame), CGRectGetHeight(self.scrollView.frame)) animated:YES];
}

Answer 1

Try SDWebImage Library for download image from server.
Objective-C:
#import "UIImageView+WebCache.h"
// imageView.image = [UIImage imageNamed:[self.imagesData objectAtIndex:i]]; comment this line and replace with bottom line
[imageView sd_setImageWithURL:[NSURL URLWithString:[self.imagesData objectAtIndex:i]
placeholderImage:[UIImage imageNamed:#"placeholder.png"]];
Whole code
for(int i=0; i<self.imagesData.count;i++){
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(CGRectGetWidth(self.view.frame) * i, 0, CGRectGetWidth(self.view.frame), CGRectGetHeight(self.scrollView.frame))];
imageView.contentMode = UIViewContentModeScaleAspectFill;
[imageView sd_setImageWithURL:[NSURL URLWithString:[self.imagesData objectAtIndex:i]
placeholderImage:[UIImage imageNamed:#"placeholder.png"]];
[self.scrollView addSubview:imageView];
}
SDWebImage Source

Answer 2

This is your basic setup for the scrollView:
//data
NSArray * imageArray = #[#"a.jpg",#"b.jpg",#"c.jpg"];
//view
UIScrollView * scrollView = [UIScrollView new];
scrollView.frame = CGRectMake(0, 0, 320, 200);
[self.view addSubview:scrollView];
//add in
float x = 0;
float imageWidth = 320;
for (int n = 0; n < imageArray.count; n++){
UIImageView * iv = [UIImageView new];
iv.frame = CGRectMake(x, 0, imageWidth, 200);
iv.image = [UIImage imageNamed:imageArray[n]];
iv.contentMode = UIViewContentModeScaleAspectFill;
iv.clipsToBounds = true;
[scrollView addSubview:iv];
x+=imageWidth;
}
//update content size
scrollView.contentSize = CGSizeMake(x, 200);