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由于沒有用過collectionview，也是剛開始純代碼布局，所以查了很多資料和問了一些朋友，總算解決問題

在vc里用到了另外的一些分類，如有需要歡迎追問，互相學習。歡迎大神指點

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步驟：

? 1.自定義collectionviewCell類

??2.模型類 ?

? 3. 在一個UIViewController里添加一個collectionView

第一步：自定義cell

在cell的.h 里：

#import#import "LocalWorkModel.h"

NS_ASSUME_NONNULL_BEGIN

@class LocalWorkCell;

typedef void(^CellSelectedHander)(LocalWorkCell * cell,BOOL isSelected);

@interface LocalWorkCell : UICollectionViewCell

/** model */

@property(nonatomic,strong)LocalWorkModel *model;

/** 選中圖片 */

@property(nonatomic,strong)UIImageView *selectedImage;

/// 點擊進行的回調

@property (nonatomic, copy)CellSelectedHander selectedHandler;

/// 表示選中

- (void)didSelected;

@end

在cell的.m 里：

#import "LocalWorkCell.h"

@interface LocalWorkCell ()

//圖片

@property(nonatomic,weak) UIImageView? *imageView;

@end

@implementation LocalWorkCell

//通過純代碼的方式創建此類實例會調用該方法? 在此方法中，添加子控件

- (instancetype)initWithFrame:(CGRect)frame{

if(self = [super initWithFrame:frame]){

UIImageView *imageView = [[UIImageView alloc] init];

[self addSubview:imageView];

self.imageView = imageView;

//選中cell的圖片

UIImageView *selectedImage = [[UIImageView alloc]init];

[self addSubview:selectedImage];

self.selectedImage = selectedImage;

self.selectedImage.hidden = YES;

}

return self;

}

//當子控件發生變化(包括子控件增減和位置大小改變)時,都會調用此方法來重新布局所有子控件

- (void)layoutSubviews{

[super layoutSubviews];

//設置 imageView 的 frame

//? ? CGFloat imageViewX = 10;

//? ? CGFloat imageViewY = 0;

//? ? CGFloat imageViewW = self.cc_w - 2 * imageViewX;

//? ? CGFloat imageViewH = imageViewW;

self.imageView.frame = CGRectMake(0, 0, self.cc_w + 5 , self.cc_h);

self.selectedImage.frame = self.imageView.frame;

}

//設置子控件的內容

-(void)setModel:(LocalWorkModel *)model{

_model = model;

self.imageView.image = [UIImage imageNamed:model.icon];

self.selectedImage.image = [UIImage imageNamed:@"cover_ selected"];

}

-(void)didSelected

{

self.selectedImage.hidden = !self.selectedImage.hidden;

if (self.selectedHandler) {

self.selectedHandler(self,!self.selectedImage.hidden);//已經隱藏表示需要移除

}

}

@end

第二步：模型類

在模型類的.h：

#import@interface LocalWorkModel : NSObject

//名稱

@property(nonatomic,copy)NSString *name;

//圖片

@property(nonatomic,copy)NSString *icon;

//快速創建實例

+ (instancetype)appWithDict:(NSDictionary *)dict;

@end

模型類的.m：

#import "LocalWorkModel.h"

@implementation LocalWorkModel

+ (instancetype)appWithDict:(NSDictionary *)dict{

//這樣寫會通用可以把這個作為代碼塊了

id obj = [[self alloc] init];

[obj setValuesForKeysWithDictionary:dict];

return obj;

}

@end

第三步:在一個UIViewController里添加一個collectionView

在.h里沒有代碼，所以直接.m：

#import "LocalWorkVC.h"

#import "UIBarButtonItem+Extension.h"

#import "LocalWorkCell.h"

#import "LocalWorkModel.h"

#import "PlayLocalVideoVC.h"

static NSString *ID = @"LocalWorkcell";

@interface LocalWorkVC ()@property(nonatomic,strong)UICollectionView *collectionview;

@property(nonatomic,strong)UICollectionViewFlowLayout *flowLayout;

/** 數組 */

@property(nonatomic,strong)NSMutableArray *models;

/** 操作本地數據的VIEW */

@property(nonatomic,strong)UIView *operationDataView;

@property(nonatomic,strong)UIButton *deleteButton;

//選中cell的圖片獲取

/** cell */

@property(nonatomic,strong)LocalWorkCell *selectedCellImage;

/// 表示選中的cache

@property (nonatomic, strong)NSMutableSet * cacheSet;

@end

@implementation LocalWorkVC

- (void)viewDidLoad {

[super viewDidLoad];

[self setupUI];

[self setupnavigation];

}

-(void)setupUI{

//1.創建 UICollectionView 實例

//1.1創建流水布局

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

//? ? layout.itemSize = CGSizeMake(150, 150);

//1.2通過流水布局創建UICollectionView

UICollectionView *collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth, kScreenHeight-64) collectionViewLayout:layout];

//1.3設置UICollectionView的背景色

collectionView.backgroundColor = [UIColor whiteColor];

//1.4設置數據源

collectionView.dataSource = self;

collectionView.delegate = self;

//1.5添加到View中

[self.view addSubview:collectionView];

//1.6設置為全局變量

self.collectionview = collectionView;

//3 注冊cell

[self.collectionview registerClass:[LocalWorkCell class] forCellWithReuseIdentifier:ID];

//彈出底部view

UIWindow *window = [UIApplication sharedApplication].keyWindow;

[window addSubview:self.operationDataView];

[self.operationDataView mas_makeConstraints:^(MASConstraintMaker *make) {

make.left.equalTo(0);

make.right.equalTo(0);

make.bottom.equalTo(0);

make.height.equalTo(44);

}];

self.operationDataView.hidden = YES;

//刪除delete

[self.operationDataView addSubview:self.deleteButton];

[self.deleteButton mas_makeConstraints:^(MASConstraintMaker *make) {

make.top.bottom.right.left.equalTo(0);

}];

//collection

[self.view addSubview:_collectionview];

//初始化模擬數據源

self.cacheSet = [NSMutableSet set];

}

-(void)setupnavigation{ ? ? ?self.title = @"本地作品";? ? self.navigationController.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName : [CCTools stringToColor:@"#333333"]};? ? //導航欄右邊按鈕，系統的不能修改，自己寫個按鈕上去? ? UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"選擇" style:UIBarButtonItemStylePlain target:self action:@selector(navChooseRightButton)];? ? rightButton.tintColor = RGB(51, 51, 51);? ? [rightButton setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont fontWithName:@"" size:17.0], NSForegroundColorAttributeName, nil] forState:UIControlStateNormal];? ? self.navigationItem.rightBarButtonItem = rightButton;}-(void)navChooseRightButton{? ? ? ? if ([self.navigationItem.rightBarButtonItem.title isEqualToString:@"選擇"]) {? ? ? ? [self.navigationItem.rightBarButtonItem setTitle:@"取消"];? ? ? ? self.operationDataView.hidden = NO;? ? }else if ([self.navigationItem.rightBarButtonItem.title isEqualToString:@"取消"]){? ? ? ? [self.navigationItem.rightBarButtonItem setTitle:@"選擇"];? ? ? ? self.operationDataView.hidden = YES;? ? ? ? ? ? }? ? }-(void)deleteEvent{? ? DLog(@"事件");? ? [self p_deleteHandler];? ? _deleteButton.userInteractionEnabled = NO;? ? _deleteButton.alpha = 0.4;}#pragma mark - 進行刪除操作- (void)p_deleteHandler{? ? //如果沒有選擇，return? 這里也可以判斷是否有選中的cell? ? if (self.cacheSet.count == 0) {? return;? }? ? ? //獲得無序序列? ? NSArray * indexPaths = self.cacheSet.allObjects;? ? ? ? //變為有序? ? NSSortDescriptor * descirptor = [NSSortDescriptor sortDescriptorWithKey:@"row" ascending:true];? ? ? ? NSArray* deleteIndexPath = [indexPaths sortedArrayUsingDescriptors:@[descirptor]];

//逆序刪除數據源

for (NSInteger i = deleteIndexPath.count - 1; i >= 0; i--) {

NSInteger row = deleteIndexPath[i].row;

//刪除

[self.models removeObjectAtIndex:row];

}

//刷新collectionView

[self.collectionview deleteItemsAtIndexPaths:deleteIndexPath];

//刪除所有數據

[self.cacheSet removeAllObjects];

//返回

//? ? [self.navigationController popViewControllerAnimated:true];

}

-(void)viewWillAppear:(BOOL)animated{

[super viewWillAppear:animated];

[self.navigationController setNavigationBarHidden:NO];

}

- (void)viewWillDisappear:(BOOL)animated{

[super viewWillDisappear:animated];

[self.navigationController setNavigationBarHidden:YES];

}

#pragma mark -2.實現數據源方法//2.1 返回多少組- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{? ? return 1;}//2.2 返回每組有多少item- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{? ? return self.models.count;}//2.3 返回每個item的cell- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{? ? //獲得可重用cell? ? LocalWorkCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:ID forIndexPath:indexPath];? ? __weak typeof(self) weakSelf = self;? ? //設置交互回調? ? cell.selectedHandler = ^(LocalWorkCell * _Nonnull cell,BOOL isSelected) {? ? ? ? ? ? ? ? /********? 使用回調獲得indexPath? **********/? ? ? ? ? ? ? ? //獲得indexPath? ? ? ? NSIndexPath * index = [weakSelf.collectionview indexPathForCell:cell];? ? ? ? ? ? ? ? if (isSelected) {//表示選中，添加indexPath至Set? ? ? ? ? ? _deleteButton.userInteractionEnabled = YES;? ? ? ? ? ? _deleteButton.alpha = 1.0;? ? ? ? ? ? [weakSelf.cacheSet addObject:index];? ? ? ? }? ? ? ? ? ? ? ? else { //移除? ? ? ? ? ? _deleteButton.userInteractionEnabled = NO;? ? ? ? ? ? _deleteButton.alpha = 0.4;? ? ? ? ? ? [weakSelf.cacheSet removeObject:index];? ? ? ? }? ? };? ? //設置狀態? ? cell.selectedImage.hidden = ![self.cacheSet containsObject:indexPath];? ? //給cell設置數據? ? cell.model = self.models[indexPath.item];? ? //返回cell? ? return cell;}//_deleteButton.userInteractionEnabled = NO;//點擊item（cell）方法- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{? ? DLog(@"indexPath= %ld",indexPath.row);? ? ? if ([self.navigationItem.rightBarButtonItem.title isEqualToString:@"選擇"]) {? ? ? ? PUSH_CONTROL(PlayLocalVideoVC);? ? }? ? if ([self.navigationItem.rightBarButtonItem.title isEqualToString:@"取消"]){? ? ? ? //獲得cell? ? ? ? LocalWorkCell * cell = (LocalWorkCell *)[collectionView cellForItemAtIndexPath:indexPath];? ? ? ? ? ? ? ? [cell didSelected];? ? }}- (void)deleteItemsAtIndexPaths:(NSArray*)indexPaths{

[[[UICollectionView alloc] init] deleteItemsAtIndexPaths:@[[NSIndexPath indexPathForItem:0 inSection:0]]];

}

//返回每一個cell的大小

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{

return CGSizeMake(self.collectionview.cc_w / 3 -5, 150);

}

//設置每個item的UIEdgeInsets? 組內邊距

- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{

return UIEdgeInsetsMake(5, 0, 44, 0);

}

//cover_ selected

//設置最小行間距，也就是前一行與后一行的中間最小間隔? 上下距離

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section{

return 3;

}

// 設置最小列間距，也就是左行與右一行的中間最小間隔? 左右距離

-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {

return 3;

}

#pragma mark -懶加載

-(NSMutableArray *)models{

if (_models == nil) {

//獲得app.plist的路徑

NSString *path = [[NSBundle mainBundle] pathForResource:@"localWork.plist" ofType:nil];

//加載app.plist中的字典為數組

NSArray *arr = [NSArray arrayWithContentsOfFile:path];

NSMutableArray *array = [NSMutableArray array];

//字典轉模型

for(NSDictionary *dict in arr){

LocalWorkModel *model = [LocalWorkModel appWithDict:dict];

[array addObject:model];

}

_models = array;

}

return _models;

}

-(UIView *)operationDataView{

if (_operationDataView == nil) {

_operationDataView = [[UIView alloc]init];

//? ? ? ? _operationDataView.backgroundColor = [UIColor grayColor];

}

return _operationDataView;

}

-(UIButton *)deleteButton{

if (_deleteButton == nil) {

_deleteButton = [[UIButton alloc]init];

_deleteButton.backgroundColor = [UIColor redColor];

[_deleteButton setTitle:@"刪除" forState:UIControlStateNormal];

[_deleteButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];

_deleteButton.layer.cornerRadius = 4.5;? // 設置圓角

[_deleteButton addTarget:self action:@selector(deleteEvent) forControlEvents:UIControlEventTouchUpInside];

_deleteButton.userInteractionEnabled = NO;

_deleteButton.alpha = 0.4;

}

return _deleteButton;

}

@end

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iOS 純代碼自定義collectionview，選中，刪除cell效果

iOS 純代碼自定義collectionview，選中，刪除cell效果

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iOS 純代碼自定義collectionview，選中，刪除cell效果

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三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美国产综合欧美视频