UICollectionViewController简单操作(2)

￡神魔★判官ぃ 2022-08-09 14:59 104阅读 0赞

//
    //  ViewController.m
    //  IOS核心开发手册_第十章_collection简单学习
    //
    //  Created by 麦子 on 15/10/29.
    //  Copyright © 2015年 麦子. All rights reserved.
    //
    
    #import "ViewController.h"
    
    @interface ViewController ()
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        
        UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc]init];
        [flowLayout setScrollDirection:UICollectionViewScrollDirectionVertical];
    
        UICollectionView *collection = [[UICollectionView alloc]initWithFrame:self.view.bounds collectionViewLayout:flowLayout];
        
        collection.backgroundColor = [UIColor whiteColor];
        
        collection.delegate = self;
        collection.dataSource = self;
         
        
        [self.view addSubview:collection];
        
        UINib *nib = [UINib nibWithNibName:@"CollectionCellCollectionViewCell" bundle:nil];
        [collection registerNib:nib forCellWithReuseIdentifier:@"myCollectionCell"];
        
        
    }
    
    #pragma mark  几个区
    - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
    
    
        return 2;
    }
    
    #pragma mark  目前是一个区域一共有10个cell
    - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
    
        return 50;
    }
    
    #pragma mark cell 内容
    - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    
        UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"myCollectionCell" forIndexPath:indexPath];
        
        return cell;
    }
    
    #pragma mark flowLayout   定义item的大小，也就是cell的大小
    - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
    
        return CGSizeMake(80, 80);
    }
    
    #pragma mark UICollectionView 距离4个方向的距离，是这个整体的内容距离
    - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{
    
    
        return UIEdgeInsetsMake(2,2,10,10);
    }
    #pragma mark 
    - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
    
        NSLog(@"---->%ld--->%ld",indexPath.section,indexPath.row);
    }
    
    
    #pragma mark 如果是垂直方向， 这个就用来控制，竖和竖之间距离
    - (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section{
    
    
        return 10.0f;
    }
    
    #pragma mark 如果是垂直方向， 这个就用来控制，行和行之间的距离
    - (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section{
    
        return 20.0f;
    }
    
    #pragma mark  尾部距离
    - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section{
    
        return CGSizeMake(10, 100);
    }
    
    #pragma mark 头部的距离
    - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section{
    
    
        return CGSizeMake(10, 100);
    }
    
    
    
    
    @end