如何在iOS中创建基于节的UICollectionVIew
我正在开发基于节的UICollection视图,类似于基于节的UITableView。但是每个节都有不同数量的数据。但我的问题是,它包含每个部分的相似数据 以下是代码:-如何在iOS中创建基于节的UICollectionVIew,ios,objective-c,iphone,ios7,uicollectionview,Ios,Objective C,Iphone,Ios7,Uicollectionview,我正在开发基于节的UICollection视图,类似于基于节的UITableView。但是每个节都有不同数量的数据。但我的问题是,它包含每个部分的相似数据 以下是代码:- - (void)viewDidLoad{ [super viewDidLoad]; //registering class for cell reusing [self.collectionView registerClass:[CollectionViewCell class] forCellWit
- (void)viewDidLoad{
[super viewDidLoad];
//registering class for cell reusing
[self.collectionView registerClass:[CollectionViewCell class] forCellWithReuseIdentifier:@"CollectionCell"];
//registering class for view reusing
[self.collectionView registerClass:[SupplementaryView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"SupplementaryView"];
NSDictionary *animals = @{@"B" : @[@"Bear", @"Black Swan", @"Buffalo"],
@"C" : @[@"Camel", @"Cockatoo"],
@"D" : @[@"Dog", @"Donkey"],
@"E" : @[@"Emu"],
@"G" : @[@"Giraffe", @"Greater Rhea"],
@"H" : @[@"Hippopotamus", @"Horse"],
@"K" : @[@"Koala"],
@"L" : @[@"Lion", @"Llama"],
@"M" : @[@"Manatus", @"Meerkat"],
@"P" : @[@"Panda", @"Peacock", @"Pig", @"Platypus", @"Polar Bear"],
@"R" : @[@"Rhinoceros"],
@"S" : @[@"Seagull"],
@"T" : @[@"Tasmania Devil"],
@"W" : @[@"Whale", @"Whale Shark", @"Wombat"]};
NSArray* animalSectionTitles = [[animals allKeys] sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CollectionCell" forIndexPath:indexPath];
cell.label.text = @"Hello";
cell.backgroundColor = [UIColor darkGrayColor];
return cell;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return [animals count];
}
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
return [animalSectionTitles count];
}
-(UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{
SupplementaryView *supplementaryView = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:@"SupplementaryView" forIndexPath:indexPath];
if(kind == UICollectionElementKindSectionHeader){
supplementaryView.backgroundColor = [UIColor lightGrayColor];
supplementaryView.label.text = @"Header";
}
else{
}
return supplementaryView;
}
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section{
return CGSizeMake(500, 50);
}
谢谢
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return [animals count];
}
此方法询问一个特定部分中有多少单元格。当您返回此处时,始终会有相同的值,分区中的单元格数量也将始终相同。类似的内容可能会对您有所帮助
- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section {
int i=0;
for (NSDictionary *item in animals) {
if (section==i) {
NSArray *lala=[animals objectForKey:item];
NSLog(@"%d",lala.count);
return lala.count;
}
i++;
}
}
我不想使用,否则它会变成静态的,我想变成动态的。@Rushabh我编辑了这个,使它更全球化。现在也许更好。