Multiple UICollectionView in one view update second UICollectionView data - ios

Question

I want to design as like image. I use two UICollectionView to design. But I can't update second UICollectionView data after click fast on UICollectionview row. I never think this is the correct way to do this. Any suggestion please. I need to do with Objective-C.
My Code:
- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section
{
if (view.tag == 1) {
return 20;//SelfiThemeIm;age.count
} else {
return 15;
}
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
if (cv.tag == 0) {
TopCell *cell = [cv dequeueReusableCellWithReuseIdentifier:#"TopCell" forIndexPath:indexPath];
NSData * imageData = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString: SelfiThemeImage[indexPath.row]]];
cell.imageView.image = [UIImage imageWithData: imageData];
return cell;
} else {
BottomCell *cell = [cv dequeueReusableCellWithReuseIdentifier:#"BottomCell" forIndexPath:indexPath];
NSData * imageData = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString: SelfiThemePhysicalFileName[indexPath.row]]];
cell.imageView.image = [UIImage imageWithData: imageData];
return cell;
}
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
NSString *ThemeURL;
if (collectionView.tag == 1) {
ThemeURL = #"http://wap.shabox.mobi/sticker_app_server/content.aspx?catid=";
ThemeURL =[ThemeURL stringByAppendingString:[SelfiThemeImageContentCode objectAtIndex:indexPath.row]];
BottomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"BottomCell" forIndexPath:indexPath];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:ThemeURL
parameters:nil
success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSString *array= [responseObject objectForKey:#"stickers"];
self.selfidata = array;
// NSLog(#"JSON responce Selfi: %#", self.selfidata);
for(int i=0; i<=self.selfidata.count-1; i++){
NSString *PhysicalFileName = #"http://wap.shabox.mobi/CMS/content/graphics/Stickers/D200x200/";
PhysicalFileName =[PhysicalFileName stringByAppendingString:[[self.selfidata objectAtIndex:i]objectForKey:#"PhysicalFileName"]];
PhysicalFileName =[PhysicalFileName stringByAppendingString:#".png"];
[SelfiThemePhysicalFileName addObject:[NSString stringWithFormat:PhysicalFileName]];
NSLog(#"PhysicalFileName Array - %#", PhysicalFileName);
}
NSLog(#"SelfiThemePhysicalFileName Array - %#", SelfiThemePhysicalFileName);
NSData * imageData = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString: SelfiThemePhysicalFileName[indexPath.row]]];
cell.imageView.image = [UIImage imageWithData: imageData];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
}else{
}
}

Answer 1

- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section
{
if (view.tag == 1) {
return SelfiThemeImage.count;
} else {
return SelfiThemePhysicalFileName.count;
}
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
if (cv.tag == 0) {
TopCell *cell = [cv dequeueReusableCellWithReuseIdentifier:#"TopCell" forIndexPath:indexPath];
NSData * imageData = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString: SelfiThemeImage[indexPath.row]]];
cell.imageView.image = [UIImage imageWithData: imageData];
return cell;
} else {
BottomCell *cell = [cv dequeueReusableCellWithReuseIdentifier:#"BottomCell" forIndexPath:indexPath];
NSData * imageData = [[NSData alloc] initWithContentsOfURL: [NSURL URLWithString: SelfiThemePhysicalFileName[indexPath.row]]];
cell.imageView.image = [UIImage imageWithData: imageData];
return cell;
}
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
NSString *ThemeURL;
if (collectionView.tag == 1) {
ThemeURL = #"http://wap.shabox.mobi/sticker_app_server/content.aspx?catid=";
ThemeURL =[ThemeURL stringByAppendingString:[SelfiThemeImageContentCode objectAtIndex:indexPath.row]];
BottomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"BottomCell" forIndexPath:indexPath];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:ThemeURL
parameters:nil
success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSString *array= [responseObject objectForKey:#"stickers"];
self.selfidata = array;
// NSLog(#"JSON responce Selfi: %#", self.selfidata);
for(int i=0; i<=self.selfidata.count-1; i++){
NSString *PhysicalFileName = #"http://wap.shabox.mobi/CMS/content/graphics/Stickers/D200x200/";
PhysicalFileName =[PhysicalFileName stringByAppendingString:[[self.selfidata objectAtIndex:i]objectForKey:#"PhysicalFileName"]];
PhysicalFileName =[PhysicalFileName stringByAppendingString:#".png"];
[SelfiThemePhysicalFileName addObject:[NSString stringWithFormat:PhysicalFileName]];
NSLog(#"PhysicalFileName Array - %#", PhysicalFileName);
}
NSLog(#"SelfiThemePhysicalFileName Array - %#", SelfiThemePhysicalFileName);
[self.myCollectionView reloadData];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];
}else{
}
}
I made changes in your code that just replace it with your code .
Happy Coding. give vote and approve it
Thank You.

Answer 2

You need have 2 objects referring CollectioView lets say _collectionView1 and _collectionView1.
Now make sure delegate for these 2 is set to self
in -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath check
if ([collectionView isEqualTo:_collectionView1]) {
_collectionView2DataSource = ;//Do your calculation and setting
[_collectionView2 reloadData] ;
}
I am considering you have populated initial value and you are aware of all collection-view datasource and delegate functioning.

Answer 3

If you have the 2nd collectionview in storyboard/xib file, create the IBOUTLET for that collectionview and name it "what_ever_name_you_want"
if you have created this programatically, make the collectionview a global variable in the class
in didSelect method reload the collection view by calling ["what_ever_name_you_gave" reloadData];

Answer 4

you need to change this line because this line create new cell instance .
BottomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"BottomCell" forIndexPath:indexPath];
change with :
BottomCell *cell = [collectionView cellForItemAtIndexPath:indexPath];