CollectionView水平滚动在ios 7中不起作用，但它在ios 8和9中工作正常。有没有解决方案呢？
守则在这里：
UICollectionViewFlowLayout *layout=[[UICollectionViewFlowLayout alloc] init];
layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
layout.itemSize = CGSizeMake(330, 100);
collection = [[UICollectionView alloc] initWithFrame:CGRectMake(0.0, 50.0, 350, 100) collectionViewLayout:layout];
collection.delegate = self;
collection.dataSource = self;
collection.backgroundColor = [UIColor greenColor];
collection.pagingEnabled = YES;
[collection registerClass：[UICollectionViewCell class] forCellWithReuseIdentifier：@“Cell”];
[self.view addSubview:collection];
答案 0 :(得分：0)
它现在符合我的需求，可能对其他人有用，所以这是我的代码： 我在iOS7-8-9中测试过。以下示例适用于默认iPad。您只需要更改目标设置和O.S版本。
<强> https://github.com/philippeauriach/fullyhorizontalcollectionview
请下载它＆amp;让我们知道你的评论。快乐的编码！
如果要在View上添加集合视图，请使用下面的代码。下面的代码我已经以编程方式创建了CL View，它也可以与Autolayout和iOS 7-8-9一起正常工作。请执行以下代码，并告诉我们您的意见。
.H文件
@interface HorizontalCollectionViewController : UIViewController<UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout>{
NSIndexPath *visibleIndexPath;
}
@property (nonatomic, assign) NSInteger selectedCell;
@property (strong, nonatomic) IBOutlet UICollectionView *horizonCLView;
.M文件
#import "HorizontalCollectionViewController.h"
static NSString * const CellIdentifier = @“horizonCell";
@interface HorizontalCollectionViewController ()
@end
@implementation HorizontalCollectionViewController
@synthesize horizonCLView;
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(@"view frame : %@",NSStringFromCGRect(self.view.frame));
[self.view layoutIfNeeded];
[self.view setNeedsLayout];
[self viewDidLayoutSubviews];
UICollectionViewFlowLayout *layout=[[UICollectionViewFlowLayout alloc] init];
layout.itemSize = self.view.frame.size;
[layout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
[layout setMinimumInteritemSpacing:0.f];
[layout setMinimumLineSpacing:0.f];
layout.sectionInset = UIEdgeInsetsMake(0, 0, 0, 0);
horizonCLView = [[UICollectionView alloc] initWithFrame:self.view.frame collectionViewLayout:layout];
horizonCLView.dataSource = self;
horizonCLView.delegate = self;
horizonCLView.backgroundColor = [UIColor lightGrayColor];
horizonCLView.scrollEnabled = YES;
[horizonCLView setBounces:NO];
[horizonCLView setUserInteractionEnabled:YES];
[horizonCLView setPagingEnabled:YES];
[horizonCLView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:CellIdentifier];
[self.view addSubview:horizonCLView];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
-(void)viewWillAppear:(BOOL)animated{
//Select Current Image For Sare In Social Media
// currentImageIndex = selectedCell;
[horizonCLView scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:selectedCell inSection:0] atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];
CGRect visibleRect = (CGRect){.origin = self.horizonCLView.contentOffset, .size = self.horizonCLView.bounds.size};
CGPoint visiblePoint = CGPointMake(CGRectGetMidX(visibleRect), CGRectGetMidY(visibleRect));
visibleIndexPath = [self.horizonCLView indexPathForItemAtPoint:visiblePoint];
// NSLog(@"visibleIndexPath.row in View will appear %ld",(long)visibleIndexPath.row);
//SelectedCell is a selected image from gallary view
NSLog(@"selectedCell in View will appear: %ld",(long)selectedCell);
}
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
return 1;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return [dataAry count];
}
#pragma Here we set the frame of horizontal scrll view
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
// expand cell to fill the entire view
return collectionView.frame.size;
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];
self.title = [[self.dataAry objectAtIndex:indexPath.row] valueForKey:@“dataAryName"];
//imageVI.image = nil;
imageVI = (UIImageView *)[cell.contentView viewWithTag:100];
if (!imageVI){
imageVI = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,self.view.bounds.size.width,self.view.bounds.size.height)];
imageVI.contentMode = UIViewContentModeScaleAspectFill;
imageVI.tag = 100;
imageVI.clipsToBounds = YES;
[cell.contentView addSubview:imageVI];
}
dispatch_async(dispatch_get_main_queue(), ^{
[asSetLib assetForURL:[NSURL URLWithString:[[self.dataAry objectAtIndex:indexPath.row] valueForKey:@"dataAryName"]] resultBlock:^(ALAsset *asset) {
// imageVI.image = [UIImage imageWithCGImage:asset.defaultRepresentation.fullScreenImage];
imageVI.image = [UIImage imageWithCGImage:asset.defaultRepresentation.fullResolutionImage];
NSLog(@"Preview view into album loaded successfully!");
} failureBlock:^(NSError *error) {
NSLog(@"An error occurred while loading image: %@", error.description);
}];
});
return cell;
}
答案 1 :(得分：0)
Sudha，我认为你的代码中的问题不是iOS7问题。 在这里，我查看了你的代码中的两个错误。
1）在这一行中，你给出了集合视图的静态宽度，
collection = [[UICollectionView alloc] initWithFrame:CGRectMake(0.0, 50.0, 350, 100) collectionViewLayout:layout];
而不是看起来像，
collection = [[UICollectionView alloc] initWithFrame:CGRectMake(0.0, 50.0, self.view.bounds.size.width, 100) collectionViewLayout:layout];
确保您的收藏视图宽度尺寸始终与您的视图尺寸一致。
2）确保您的布局项目大小宽度高于集合视图宽度框架。否则滚动不受影响。
layout.itemSize = CGSizeMake(self.view.bounds.size.width+10, 100);
3）小心使用，
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath;
收集视图布局大小方法的委托方法。
4）最后你的代码看起来像，
- (void)viewDidLoad {
[super viewDidLoad];
UICollectionViewFlowLayout *layout=[[UICollectionViewFlowLayout alloc] init];
layout.itemSize = CGSizeMake(self.view.bounds.size.width+10, 100);
[layout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
collection = [[UICollectionView alloc] initWithFrame:CGRectMake(0.0, 50.0, self.view.bounds.size.width, 100) collectionViewLayout:layout];
collection.delegate = self;
collection.dataSource = self;
collection.backgroundColor = [UIColor greenColor];
collection.pagingEnabled = YES;
collection.scrollEnabled = YES;
collection.userInteractionEnabled = YES;
[collection registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"Cell"];
[self.view addSubview:collection];
}
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
return 1;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return 1;
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
return cell;
}
Happy Coding!
答案 2 :(得分：-1)
在视图中添加了collectionView之后我已经使用了一行代码，它在ios 7中工作正常。
在[self addSubview：self.collectionView];
之后添加此代码这里是代码：
[self performSelector：@selector（update）withObject：nil afterDelay：1];