IOS多选单选相册图片

之前做项目让实现多选相册的图片,自己写了一个demo一直保存在电脑上,今天下午发现电脑128G的容量已经快没有了,准备清理电脑,所以把之前做的一些demo放在博客上,以后方便用。

1.首先准备3个图片

2.定义单元格PhoCollectionViewCell

#import <UIKit/UIKit.h>typedef void(^SelectBtnClickBlock) (BOOL isSelect);@interface PhoCollectionViewCell : UICollectionViewCell@property (weak ,nonatomic)  IBOutlet  UIImageView *  imageView;@property (weak ,nonatomic)  IBOutlet  UIImageView *  selectImageView;@property (nonatomic,copy) SelectBtnClickBlock selectBtnClickBlock;- (IBAction)selectBtnClick:(id)sender;@property (weak, nonatomic) IBOutlet UIButton *selectBtn;@end

#import "PhoCollectionViewCell.h"@implementation PhoCollectionViewCell- (void)awakeFromNib {// Initialization code
    
}- (IBAction)selectBtnClick:(id)sender {UIButton *btn=(UIButton *)sender;btn.selected=!btn.selected;NSLog(@"%@",@"aaaa");_selectBtnClickBlock(btn.selected);
}
@end

3.创建相片Model

#import <Foundation/Foundation.h>
#import <AssetsLibrary/ALAssetsLibrary.h>@interface PhoModel : NSObject@property(nonatomic,strong) ALAsset *asset;
@property (nonatomic,assign) BOOL isSelected;
@end

#import "PhoModel.h"@implementation PhoModel@end

4.获取相册图片显示图片

#import "ViewController.h"
#import <AssetsLibrary/AssetsLibrary.h>#import "AppDelegate.h"
#import "PhoModel.h"
#import "PhoCollectionViewCell.h"#define ApplicationDelegate ((AppDelegate *)[UIApplication sharedApplication].delegate)static NSInteger count = 0;@interface ViewController ()
{NSMutableArray *mutableAssets;
}
@property (weak, nonatomic) IBOutlet UICollectionView *collectionView;@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];//获取相册中的全部照片
    [self getAllPictures];[_collectionView registerNib: [UINib nibWithNibName:@"PhoCollectionViewCell" bundle:nil] forCellWithReuseIdentifier:@"CollectionViewCell"];
}//获取相册中的全部照片
-(void)getAllPictures {mutableAssets = [[NSMutableArray alloc]init];NSMutableArray *assetURLDictionaries = [[NSMutableArray alloc] init];NSMutableArray *assetGroups = [[NSMutableArray alloc] init];__block NSMutableArray *tempMutableAssets = mutableAssets;__block ViewController *tempSelf = self;__block NSMutableArray *tempAssetGroups = assetGroups;[ApplicationDelegate.library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop){if (group != nil) {count = [group numberOfAssets];__block int groupNum = 0;[group enumerateAssetsUsingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop){if(asset != nil) {++ groupNum;if([[asset valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {[assetURLDictionaries addObject:[asset valueForProperty:ALAssetPropertyURLs]];NSURL *url= (NSURL*) [[asset defaultRepresentation]url];NSLog(@"%@,%@",[asset valueForProperty:ALAssetPropertyDate],url);//                        [UIImage imageWithCGImage:[[result defaultRepresentation] fullScreenImage]];//图片
//                        [UIImage imageWithCGImage:[result thumbnail]];    //缩略图
                        PhoModel *phoModel=[[PhoModel alloc]init];phoModel.asset=asset;phoModel.isSelected=NO;[tempMutableAssets addObject:phoModel];if (tempMutableAssets.count == groupNum) {[tempSelf allPhotosCollected:tempMutableAssets];}}}}];[tempAssetGroups addObject:group];}}failureBlock:^(NSError *error){NSLog(@"There is an error");}];
}//所有asset
-(void)allPhotosCollected:(NSMutableArray *)mutableAsset{[self.collectionView reloadData];
}#pragma mark -- UICollectionViewDataSource- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {CGSize itemSize = CGSizeMake(([UIScreen mainScreen].bounds.size.width-15)/4.0, ([UIScreen mainScreen].bounds.size.width-30)/4.0);return itemSize;
}//定义展示的UICollectionViewCell的个数
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{return mutableAssets.count+1;
}
//每个UICollectionView展示的内容
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{static NSString * CellIdentifier = @"CollectionViewCell";PhoCollectionViewCell * cell = [collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];if (indexPath.row==0) {cell.imageView.image = [UIImage imageNamed:@"0.png"];cell.selectImageView.hidden=YES;cell.selectBtnClickBlock=^(BOOL isSelect){NSLog(@"cell1 block");};return cell;}PhoModel *phoModel = mutableAssets[indexPath.row-1];cell.imageView.image = [UIImage imageWithCGImage:[phoModel.asset thumbnail]];if (phoModel.isSelected) {cell.selectImageView.image=[UIImage imageNamed:@"2.png"];}else{cell.selectImageView.image=[UIImage imageNamed:@"1.png"];}cell.selectImageView.hidden=NO;cell.selectBtn.selected=phoModel.isSelected;cell.selectBtnClickBlock=^(BOOL isSelect){//单选多选标记 false 单选 true 多选BOOL issangal=false;if (issangal) {for (PhoModel *tmpPhotoModel in mutableAssets) {tmpPhotoModel.isSelected = NO;}}phoModel.isSelected=isSelect;[_collectionView reloadData];};return cell;
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {NSLog(@"%ld",indexPath.row);
}- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}@end