现在 OP 想要集合视图的水平滚动方向。所以我再次为此创建了一个小示例项目。我在水平滚动方向放置了 13 个图像。它在集合视图的水平方向上成功滚动。
为什么我在这里发布水平滚动collectionView是每个人都可以理解答案并轻松获得解决方案。我添加了额外的图像，我的意思是正好13张图片（op希望13张图片进入collection view）。这个答案肯定对你有帮助。
HorizontalScrollableCollectionView
这里我在CustomImageFlowLayout.m文件中将scrollDirection设置为Horizontal
CustomImageFlowLayout.h
#import <UIKit/UIKit.h>
@interface CustomImageFlowLayout : UICollectionViewFlowLayout
@end
CustomImageFlowLayout.m
#import "CustomImageFlowLayout.h"
@implementation CustomImageFlowLayout
- (instancetype)init
{
self = [super init];
if (self)
{
self.minimumLineSpacing = 1.0f;
self.minimumInteritemSpacing = 1.0f;
self.scrollDirection = UICollectionViewScrollDirectionHorizontal;
}
return self;
}
- (CGSize)itemSize
{
NSInteger numberOfColumns;
if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
numberOfColumns = 3;
else{
if([UIApplication sharedApplication].statusBarOrientation==UIInterfaceOrientationPortrait)
numberOfColumns = 4;
else if([UIApplication sharedApplication].statusBarOrientation == UIDeviceOrientationLandscapeRight || [UIApplication sharedApplication].statusBarOrientation == UIDeviceOrientationLandscapeLeft)
numberOfColumns = 4;
}
NSLog(@"The collection view frame is - %@",NSStringFromCGRect(self.collectionView.frame));
CGFloat itemWidth = (CGRectGetWidth(self.collectionView.frame) - (numberOfColumns - 1)) / numberOfColumns;
NSLog(@"The item width is - %f",itemWidth);
return CGSizeMake(itemWidth, itemWidth);
}
@end
然后是 UICollectionViewCell 的 CustomCell
CustomCell.xib
CustomCell.h
#import <UIKit/UIKit.h>
@interface CustomCell : UICollectionViewCell
@property (strong, nonatomic) IBOutlet UIImageView *img;
@property (strong, nonatomic) IBOutlet UILabel *lblCollection;
@end
CustomCell.m
#import "CustomCell.h"
@implementation CustomCell
- (void)awakeFromNib {
[super awakeFromNib];
// Initialization code
}
@end
现在故事板设计开始
我的集合视图名称在这里是collectionviewVerticalHorizontalFlowLayout
ViewController.h
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController<UICollectionViewDelegate,UICollectionViewDataSource>
@property (strong, nonatomic) IBOutlet UICollectionView *collectionviewVerticalHorizontalFlowLayout;
@end
ViewController.m
#import "ViewController.h"
#import "CustomCell.h"
#import "CustomImageFlowLayout.h"
@interface ViewController (){
NSMutableArray *arrayImages;
NSMutableArray *arrayTitles;
CustomCell *cell;
}
@end
@implementation ViewController
@synthesize collectionviewVerticalHorizontalFlowLayout;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
collectionviewVerticalHorizontalFlowLayout.collectionViewLayout = [[CustomImageFlowLayout alloc] init];
collectionviewVerticalHorizontalFlowLayout.backgroundColor = [UIColor clearColor];
arrayImages = [[NSMutableArray alloc]initWithObjects:@"iPhone.png", @"android.png", @"windows.png", @"blackberry.png", @"lenovovibek5note.png", @"redmi.png", @"moto.png", @"sony.png", @"samsung.png", @"oneplus.png",@"redminote4.png",@"oppo.png",@"vivo.png",nil];
arrayTitles = [[NSMutableArray alloc]initWithObjects:@"iPhone", @"Android", @"Windows", @"Blackberry", @"LenovaVikeK5Note", @"Redmi", @"MotoG", @"Sony", @"Samsung", @"OnePlus", @"RedMiNote4",@"Oppo",@"Vivo",nil];
UINib *cellNib = [UINib nibWithNibName:@"CustomCell" bundle:nil];
[collectionviewVerticalHorizontalFlowLayout registerNib:cellNib forCellWithReuseIdentifier:@"cell"];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//UICollectionView Data Source Methods
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
return 1;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return arrayImages.count;
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"cell";
cell = (CustomCell *)[collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath];
if(cell==nil){
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomCell" owner:self options:nil];
cell = nib[0];
}
cell.img.image = [UIImage imageNamed:(NSString*)[arrayImages objectAtIndex:indexPath.row]];
NSLog(@"The collection view label text is - %@",[NSString stringWithFormat:@"%@",arrayTitles[indexPath.row]]);
cell.lblCollection.text = arrayTitles[indexPath.row];
cell.lblCollection.textColor = [UIColor blackColor];
return cell;
}
//UICollectionView Delegate Method
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"the clicked indexPath.row is - %ld",(long)indexPath.row);
}
@end
最后的截图
首先显示
然后如果我在集合视图中水平滚动它会显示