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collectionView--编辑全选删除

collectionView--编辑全选删除

作者: Hyman0819 | 来源:发表于2016-11-17 11:55 被阅读386次
    //
    //  ViewController.m
    //  collectionViewDemo
    //
    //  Created by qianfeng on 16/11/16.
    //  Copyright © 2016年 qianfeng. All rights reserved.
    //
    
    #import "ViewController.h"
    #import "Cell.h"
    #import "Item.h"
    
    @interface ViewController ()<UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout>
    {
        BOOL isBtnEditing;
        BOOL isBtnSelected;
    }
    @property(strong,nonatomic) UICollectionView *collectionView;
    @property(strong,nonatomic) NSMutableArray *dataSource;
    @property(strong,nonatomic) UIButton *editBtn;
    @property(strong,nonatomic) UIButton *selectBtn;
    
    
    @end
    
    @implementation ViewController
    
    -(NSMutableArray *)dataSource
    {
        if (!_dataSource) {
            _dataSource = [NSMutableArray array];
        }
        return _dataSource;
    }
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        isBtnEditing = NO;
        isBtnSelected = NO;
        
        
        UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc]init];
        layout.minimumLineSpacing = 1;
        layout.minimumInteritemSpacing = 1;
        layout.itemSize = CGSizeMake(100, 150);
        
        self.collectionView = [[UICollectionView alloc]initWithFrame:self.view.bounds collectionViewLayout:layout];
        self.collectionView.delegate = self;
        self.collectionView.dataSource = self;
        self.collectionView.backgroundColor = [UIColor whiteColor];
        [self.view addSubview:self.collectionView];
        //注册
        [self.collectionView registerClass:[Cell class] forCellWithReuseIdentifier:@"Cell"];
        
        
        
        //编辑
        _editBtn = [UIButton buttonWithType:UIButtonTypeSystem];
        [_editBtn addTarget:self action:@selector(editBtnClick:) forControlEvents:UIControlEventTouchUpInside];
        _editBtn.frame = CGRectMake(0, 0, 80, 30);
        [_editBtn setTitle:@"编辑" forState:UIControlStateNormal];
        [_editBtn setTitle:@"取消编辑" forState:UIControlStateSelected];
        UIBarButtonItem *rightEditItem =  [[UIBarButtonItem alloc]initWithCustomView:_editBtn];
        //全选
        _selectBtn = [UIButton buttonWithType:UIButtonTypeSystem];
        [_selectBtn addTarget:self action:@selector(selectBtnClick:) forControlEvents:UIControlEventTouchUpInside];
        _selectBtn.frame = CGRectMake(0, 0, 80, 30);
        [_selectBtn setTitle:@"全选" forState:UIControlStateNormal];
        [_selectBtn setTitle:@"取消全选" forState:UIControlStateSelected];
        UIBarButtonItem *rightSelectItem =  [[UIBarButtonItem alloc]initWithCustomView:_selectBtn];
        self.navigationItem.rightBarButtonItems = @[rightEditItem,rightSelectItem];
        //删除
        UIBarButtonItem *deleteBtn =  [[UIBarButtonItem alloc]initWithTitle:@"删除" style:UIBarButtonItemStylePlain target:self action:@selector(deleteBtnClick:)];
        self.navigationItem.leftBarButtonItem = deleteBtn;
        
        
        
        for (NSInteger i = 0; i < 30; i ++) {
            
            Item *item = [[Item alloc]init];
            
            [self.dataSource addObject:item];
        }
    }
    
    
    
    -(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
    {
        return self.dataSource.count;
    }
    -(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
    {
        Cell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
        
        Item *item = self.dataSource[indexPath.item];
        
        cell.item = item;
        
        return cell;
    }
    -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
    {
        NSLog(@"点击了第几个:%li",indexPath.item + 1);
        
        Item *item = self.dataSource[indexPath.item];
        
        item.isSelected = YES;
        
        [self.collectionView reloadItemsAtIndexPaths:@[indexPath]];
    }
    
    
    
    
    
    -(void)editBtnClick:(UIButton *)sender
    {
        isBtnEditing = !isBtnEditing;
        if (isBtnEditing) {
            for (NSInteger i = 0; i < self.dataSource.count; i ++) {
                Item *item = self.dataSource[i];
                item.isEditing = YES;
            }
        }else{
            for (NSInteger i = 0; i < self.dataSource.count; i ++) {
                Item *item = self.dataSource[i];
                item.isEditing = NO;
            }
        }
        [self.collectionView reloadData];
    }
    
    
    -(void)selectBtnClick:(UIButton *)sender
    {
        isBtnSelected = !isBtnSelected;
        if (isBtnSelected) {
            for (NSInteger i = 0; i < self.dataSource.count; i ++) {
                Item *item = self.dataSource[i];
                item.isSelected = YES;
            }
        }else{
            for (NSInteger i = 0; i < self.dataSource.count; i ++) {
                Item *item = self.dataSource[i];
                item.isSelected = NO;
            }
        }
        [self.collectionView reloadData];
    }
    
    
    
    -(void)deleteBtnClick:(UIButton *)sender
    {
        NSMutableIndexSet *indexSet = [NSMutableIndexSet indexSet];
        
            for (NSInteger i = 0; i < self.dataSource.count; i ++) {
                
                Item *item = self.dataSource[i];
                
                if (item.isSelected == YES) {
                    
                    [indexSet addIndex:i];
                    
                    NSLog(@"删除第几个:%li",i);
                }
            }
        [self.dataSource removeObjectsAtIndexes:indexSet];
        
        [self.collectionView reloadData];
    }
    
    @end
    
    

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