UICollectionViewController简单操作

本是古典何须时尚 2022-08-01 12:20 168阅读 0赞

//
    //  MyCollectionViewCell.h
    //  AppUI组件学习
    //
    //  Created by 麦子 on 15/6/24.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    
    @interface MyCollectionViewCell : UICollectionViewCell
    
    @property(nonatomic,strong)UILabel *label;
    
    @end

//
    //  MyCollectionViewCell.m
    //  AppUI组件学习
    //
    //  Created by 麦子 on 15/6/24.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import "MyCollectionViewCell.h"
    
    @implementation MyCollectionViewCell
    
    @synthesize label;
    
    - (instancetype)initWithFrame:(CGRect)frameA{
        self = [super initWithFrame:frameA];
        if (self) {
            self.backgroundColor = [UIColor orangeColor];
            label = [[UILabel alloc] init];
            label.frame = CGRectMake(25, 35, 50, 30);
            label.backgroundColor = [UIColor purpleColor];
            [self addSubview:label];
        }
        return self;
        
    
    }
    
    
    @end

//
    //  MyCollectionViewController.m
    //  AppUI组件学习
    //
    //  Created by 麦子 on 15/6/24.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import "MyCollectionViewController.h"
    #import "MyCollectionViewCell.h"
    
    @interface MyCollectionViewController ()
    
    @end
    
    @implementation MyCollectionViewController
    
    static NSString * const reuseIdentifier = @"Cell";
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        self.view.backgroundColor = [UIColor whiteColor];
        self.title = @"集合视图";
        // Uncomment the following line to preserve selection between presentations
        // self.clearsSelectionOnViewWillAppear = NO;
        
        //  注册这个
        [self.collectionView registerClass:[MyCollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];
        
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        
    }
    
    #pragma mark <UICollectionViewDataSource>
    
    // 分区
    - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
         return 1;
    }
    
    // 一个区有多少行
    - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
         return 10;
    }
    
    - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
        MyCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
        cell.label.text = [NSString stringWithFormat:@"%ld",indexPath.row];
        cell.label.textColor = [UIColor redColor];
        cell.label.textAlignment = NSTextAlignmentCenter;
        
        
        return cell;
    }
    
    #pragma mark <UICollectionViewDelegate>
    
    /*
    // Uncomment this method to specify if the specified item should be highlighted during tracking
    - (BOOL)collectionView:(UICollectionView *)collectionView shouldHighlightItemAtIndexPath:(NSIndexPath *)indexPath {
    	return YES;
    }
    */
    
    /*
    // Uncomment this method to specify if the specified item should be selected
    - (BOOL)collectionView:(UICollectionView *)collectionView shouldSelectItemAtIndexPath:(NSIndexPath *)indexPath {
        return YES;
    }
    */
    
    /*
    // Uncomment these methods to specify if an action menu should be displayed for the specified item, and react to actions performed on the item
    - (BOOL)collectionView:(UICollectionView *)collectionView shouldShowMenuForItemAtIndexPath:(NSIndexPath *)indexPath {
    	return NO;
    }
    
    - (BOOL)collectionView:(UICollectionView *)collectionView canPerformAction:(SEL)action forItemAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender {
    	return NO;
    }
    
    - (void)collectionView:(UICollectionView *)collectionView performAction:(SEL)action forItemAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender {
    	
    }
    */
    
    @end

// 集合视图
        // 创建流逝布局
        UICollectionViewFlowLayout *flow = [[UICollectionViewFlowLayout alloc] init];
        // 单元格大小
        flow.itemSize = CGSizeMake(100, 100);
        // 滚动的方向
        flow.scrollDirection = UICollectionViewScrollDirectionVertical;
        // 设置边界
        flow.sectionInset = UIEdgeInsetsMake(40, 0, 0, 0);
        
        MyCollectionViewController *collectionDemo = [[MyCollectionViewController alloc] initWithCollectionViewLayout:flow];