How to Limit UICollectionViewCell to 10 or 20? If UICollectionViewCell load so many cell from API.
-(NSInteger) numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
-(NSInteger) collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return self.items.count;
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
static NSString *identifier = #"Cell";
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
eventisi* list = [_items objectAtIndex:indexPath.row];
UIImageView *iconEvent = (UIImageView*)[cell viewWithTag:1];
NSURL *url = [NSURL URLWithString:list.EVENT_IMAGE];
[iconEvent setImageWithURL:url usingActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
iconEvent.clipsToBounds = YES;
// Configure the cell
UILabel *judul = (UILabel *)[cell viewWithTag:2];
judul.text = list.EVENT_NAME;
judul.numberOfLines =2;
judul.lineBreakMode = NSLineBreakByWordWrapping;
judul.font = [UIFont systemFontOfSize:10];
return cell;
}
Limit the elements in self.items. The amount of cells displayed by a UICollectionView depends on the collectionView:numberOfItemsInSection: method, which entirely depends on the number of elements in self.items.
If you want to display a maximum of 20 UICollectionViewCells (depending on the number of items in self.items ) :
-(NSInteger) collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
if(self.items.count >= 20) {
return 20;
}
return self.items.count;
}
Related
I have a tableview which have 4 row. then i want to insert a collectionview into tableview cell and each collectionview have different cell. But i can't do that. can any one help me out or any suggesition?
You can give different CellIdentifiers for every TableViewCell and createa different rows in InterfaceBuilder or inside
cellForRowAtIndexPath
Dont forget to provide dataSource and delegate for every collectionView that you will create for TableViewCell
Pseudocode:
YN Means YourNamespace
YNDataSourceDelegate1* data1;
YNDataSourceDelegate2* data2;
YNDataSourceDelegate3* data3;
YNDataSourceDelegate4* data4;
const NSInteger COLLECTION_VIEW_TAG = 1001;
NSArray* providers=#[data1,data2,data3,data4];
NSArray* rowIds=#[#"row1",#"row2",#"row3",#"row4"];
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:rowIds[indexPath.row]];
UICollectionView * collectionView = (UICollectionView*)[cell viewWithTag:COLLECTION_VIEW_TAG];
collectionView.dataSource = providers[indexPath.row];
return cell;
}
This code will help you
yourViewController.h
#interface testingvc : UIViewController
<
UITableViewDelegate,
UITableViewDataSource,
UICollectionViewDelegate,
UICollectionViewDataSource
>
{
IBOutlet UITableView *tbleeView;
}
yourViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
tbleeView.delegate=self;
tbleeView.dataSource=self;
tbleeView.pagingEnabled=YES;
}
yourTableViewCell.h(UITableViewCell)
#property(strong,nonatomic)IBOutlet UICollectionView *clview;
yourViewController.m
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
//#warning Incomplete implementation, return the number of sections
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
//#warning Incomplete implementation, return the number of rows
return 10;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath
{
static NSString *identifierDriver = #"abcdefgh";
yourTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifierDriver forIndexPath:indexPath];
//testing table cell is a UITableViewCell
if (cell == nil)
{
cell = [[testingTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifierDriver];
}
cell.backgroundColor=[UIColor yellowColor];
//#property(strong,nonatomic)IBOutlet UICollectionView *clview;-this method is implement in UITableViewCell
// call collection view delegate method in table view cell.
cell.clview.delegate=self;
cell.clview.dataSource=self;
cell.clview.parentIndexpath = indexPath;
cell.clview.backgroundColor=[UIColor magentaColor];
cell.clview.pagingEnabled=YES;//optional
return cell;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
NSArray *collectionViewArray = [_arrayProducts [[(IndexedCollectionView *)collectionView parentIndexpath].row]objectForKey:#"inventory"];//arrProducts is an array where i get all the data from webservice
return [collectionViewArray count];
}
- (NSIndexPath *)indexPathForRowAtPoint:(CGPoint)point
{
return 0;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
yourColloectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"abcdef" forIndexPath:indexPath];
NSArray *Products = [_arrayProducts[[(yourCollectionView *)collectionView parentIndexpath].row]objectForKey:#"inventory"];//arrProducts is an array where i get all the data from webservice
NSLog(#"object ibde xis ----%ld",[Products count]);
if (indexPath.row>[Products count]-1 )
{
NSLog(#"index not found");
}
else
{
NSDictionary *dictdata = [Products objectAtIndex:indexPath.row];
NSLog(#"dictdata is =====%#",dictdata);
//do your code here
}
if (indexPath.row % 2)
{
cell.backgroundColor=[UIColor brownColor];;
}
else
cell.backgroundColor=[UIColor redColor];;
return cell;
}
- (CGFloat)collectionView:(UICollectionView *)collectionView
layout:(UICollectionViewLayout *)collectionViewLayout
minimumLineSpacingForSectionAtIndex:(NSInteger)section
{
return 0;
}
- (void)collectionView:(IndexedCollectionView *)collectionView
didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
NSInteger tableindex = collectionView.parentIndexpath.row;
NSLog(#"collection path row is ----%ld",tableindex);
NSLog(#"collection path row is ----%ld",indexPath.row);
//you can get all that index path number . Enjoy :)
}
I've created image in NSArray as follow in viewDidLoad.
menuImgs = #[#"image1", #"image2", #"image3", #"image4"];
And apply above images in UICollectionView as follow.
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"HomeCell" forIndexPath:indexPath];
UIImage *iconImg = [UIImage imageNamed:menuImgs[arrayCountChecker]];
UIImageView *cellImage = [[UIImageView alloc]initWithImage:[UIImage imageNamed:menuImgs[arrayCountChecker]]];
cellImage.frame = CGRectMake(cellWidth/2-iconImg.size.width,cellHeight/2-iconImg.size.height, iconImg.size.width, iconImg.size.height);
[cell addSubview:cellImage];
return cell;
}
What I want is I want to change image color when tapped on specific UICollectionViewCell in this function.
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
If you just want to change background color of selected cell then use cell.selectedBackgroundView otherwise,
intialize one array and store selected index in that array. And when collectionview load data check index from array and change image color according. When someone select new cell remove old index from array and store new and and reload colloectionview. Here is code example.
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
CollectionViewCustomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"Cell" forIndexPath:indexPath];
cell.lblFilter.text = filterTitles[indexPath.row];
cell.imgvFilter.image = filterImages[indexPath.row];
if([indexPath isEqual:selectedIndexPath])
{
cell.imgvFilter.superview.layer.borderColor = [UIColor lightBlue].CGColor;
cell.lblFilter.textColor = [UIColor lightBlue];
}
else
{
cell.lblFilter.textColor = [UIColor textGray];
cell.imgvFilter.superview.layer.borderColor = [UIColor borderGray].CGColor;
}
return cell;
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
[collvFilter scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionNone animated:YES];
if (![indexPath isEqual:selectedIndexPath])
{
NSIndexPath *indexPathToReload = selectedIndexPath;
selectedIndexPath = indexPath;
[collvFilter reloadItemsAtIndexPaths:#[indexPathToReload, indexPath]];
}
}
I create one UICollectionView sticky header section with this : sticky header section but when my UICollectionViewCell is 0 number header section in hide like this picture :
in my picture show me one header section (index:2) and other header section is hidden. please guide me !!! I want other show like index 2.
this is my code:
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
Flow *layout=[[Flow alloc] init];
//layout.sectionInset = UIEdgeInsetsMake(20,0,40,0);
//layout.itemSize = CGSizeMake(100,100);
_collect=[[UICollectionView alloc] initWithFrame:self.view.frame collectionViewLayout:layout];
_collect.backgroundColor = [UIColor clearColor];
[_collect setDataSource:self];
[_collect setDelegate:self];
[_collect registerClass:[HeaderView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:#"HeaderView"];
[_collect registerClass:[CollectionViewCell class] forCellWithReuseIdentifier:#"cellIdentifier"];
[self.view addSubview:_collect];
//NSLog(#"%#",self.array);
}
- (NSMutableArray*)array {
if (!_array) {
_array = [NSMutableArray array];
for (NSInteger i=0; i<SectionNum; i++) {
//NSMutableArray *inner = [NSMutableArray arrayWithObject:#"0"];
[_array addObject:#"0"];
}
}
return _array;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return SectionNum;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
if (section == 2) {
return 10;
} else
return 0;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
static NSString *identifier = #"cellIdentifier";
CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
return cell;
}
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
UICollectionReusableView *reusableview = nil;
if (kind == UICollectionElementKindSectionHeader) {
HeaderView *header = [_collect dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:#"HeaderView" forIndexPath:indexPath];
header.backgroundColor = [UIColor colorWithWhite:0.75 alpha:.9];
header.titleLabel.font = [UIFont systemFontOfSize:24];
header.titleLabel.textAlignment = NSTextAlignmentCenter;
header.titleLabel.text = [NSString stringWithFormat:#"%ld",indexPath.section];
reusableview = header;
}
if (kind == UICollectionElementKindSectionFooter) {
UICollectionReusableView *footerview = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:#"FooterView" forIndexPath:indexPath];
reusableview = footerview;
}
return reusableview;
}
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
return CGSizeMake(100,100);
}
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section {
CGSize headerSize = CGSizeMake(320, 50);
return headerSize;
}
i have multiple image in uicollectionview like grid view. i want select multiple image at a time but not working this code.please any one give idea about this code.
i have already tried this code but not working.
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath: (NSIndexPath *)indexPath
{
NSMutableArray *indexPaths = [NSMutableArray arrayWithObject:indexPath];
if (self.selectedItemIndexPath)
{
// if we had a previously selected cell
if ([indexPath compare:self.selectedItemIndexPath] == NSOrderedSame)
{
// if it's the same as the one we just tapped on, then we're unselecting it
self.selectedItemIndexPath = nil;
}
else
{
// if it's different, then add that old one to our list of cells to reload, and
// save the currently selected indexPath
[indexPaths addObject:self.selectedItemIndexPath];
self.selectedItemIndexPath = indexPath;
}
}
else
{
// else, we didn't have previously selected cell, so we only need to save this indexPath for future reference
self.selectedItemIndexPath = indexPath;
}
// and now only reload only the cells that need updating
[self.collectionView reloadItemsAtIndexPaths:indexPaths];
}
// I Have Drag the UICollectionView Controller in storyboard
static NSString * const reuseIdentifier = #"Cell";
- (void)viewDidLoad
{
[super viewDidLoad];
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];
arrImage = [[NSMutableArray alloc]initWithObjects:#"1.jpeg",#"2.jpeg",#"3.jpeg",#"4.jpeg",#"5.jpeg",#"6.jpeg",#"7.jpeg",#"8.jpeg",#"9.jpeg",#"10.jpeg",#"flower.jpeg",#"flower1.jpeg", nil];
[self.collectionView setAllowsMultipleSelection:YES];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark <UICollectionViewDataSource>
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return [arrImage count];
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image = [UIImage imageNamed:[arrImage objectAtIndex:indexPath.row]];
[self.view addSubview:recipeImageView];
cell.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:[arrImage objectAtIndex:indexPath.row]]];
return cell;
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell* cell=[self.collectionView cellForItemAtIndexPath:indexPath];
cell.contentView.backgroundColor = [[UIColor yellowColor] colorWithAlphaComponent:0.15];
}
- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell* cell=[self.collectionView cellForItemAtIndexPath:indexPath];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image = [UIImage imageNamed:[arrImage objectAtIndex:indexPath.row]];
}
I am new in iphone. I have a collection view in my app and it work fine but now I want to select an image and that image I want in next viewcontroller in another imageview. - (NSInteger)collectionView:
I use the following code:
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return recipeImages.count;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
static NSString *identifier = #"Cell";
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image = [UIImage imageNamed:[recipeImages objectAtIndex:indexPath.row]];
return cell;
}
Implement collectionView:didSelectItemAtIndexPath::
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
UIImage *image = [UIImage imageNamed:[recipeImages objectAtIndex:indexPath.item]];
// go on...
}