使用纯代码定义UICollectionView和自定义UICollectionViewCell

1.自定义UICollectionView

2.实现<UICollectionViewDataSource,UICollectionViewDelegateFlowLayout,UICollectionViewDelegate>协议

 UICollectionViewFlowLayout *flowLayout=[[UICollectionViewFlowLayout alloc] init];

            flowLayout.itemSize=CGSizeMake(60,60);

            [flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];

            

            UICollectionView *collectionView =[[UICollectionView alloc]initWithFrame:CGRectMake(0, 40, self.view.frame.size.width, self.view.frame.size.height) collectionViewLayout:flowLayout];

            

            [collectionView registerClass:[customCollectCell class]

                    forCellWithReuseIdentifier:@"myIdentifier"];

            [collectionView setBackgroundColor:[UIColor whiteColor]];

            collectionView.dataSource=self;

            collectionView.delegate=self;

            

            [myControl addSubview:collectionView];

 

3.自定义cell

　　

-(id)initWithFrame:(CGRect)frame{

    self=[super initWithFrame:frame];

    if (self) {

        UIView *view=[[UIView alloc]init];

        [view setFrame:CGRectMake(5, 0, 60, 60)];

        view.layer.cornerRadius=4;

        view.layer.masksToBounds=YES;
　　　　　//item被选中时的背景色，可以不用设置

        [view setBackgroundColor:[UIColor lightGrayColor]];

        self.selectedBackgroundView=view;

        float offset_x=5;

        float offset_y=0;

        {

            _myimageView=[[UIImageView alloc]initWithFrame:CGRectMake(15, offset_y, 60,60)];

            [_myimageView setContentMode:UIViewContentModeScaleAspectFill];

            [self addSubview:_myimageView];

            _myLabel=[[UILabel alloc]initWithFrame:CGRectMake(offset_x, offset_y+70, 60, 20)];

            [_myLabel setTextAlignment:NSTextAlignmentCenter];

            [_myLabel setFont:[UIFont systemFontOfSize:12]];

            [_myLabel setTextColor:[UIColor redColor]];

            [self addSubview:_myLabel];

            

        }



    }

        return self;

}