- 仿造连接https://www.cnblogs.com/yang-guang-girl/p/7883117.html
效果
- PhotoViewCell
@interface PhotoViewCell : UICollectionViewCell
@property(nonatomic,strong)UIImageView *photoImageView;
@property(nonatomic,strong)UIButton *delBtn;
@end
@implementation PhotoViewCell
-(instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.contentView.backgroundColor = [UIColor blueColor];
_photoImageView = [[UIImageView alloc] init];
[self.contentView addSubview:_photoImageView];
_delBtn = [UIButton buttonWithType:UIButtonTypeCustom];
_delBtn.hidden = YES;
[_delBtn setBackgroundImage:[UIImage imageNamed:@"delete"] forState:UIControlStateNormal];
[self.contentView addSubview:_delBtn];
}
return self;
}
-(void)layoutSubviews
{
[super layoutSubviews];
_photoImageView.frame = CGRectMake(0.0f, 0.0f, self.frame.size.width, self.frame.size.height);
_delBtn.frame = CGRectMake(self.frame.size.width - 10.0f, -10.0f, 20.0f, 20.0f);
}
// 删除按钮超出区域响应
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
UIView *view = [super hitTest:point withEvent:event];
CGPoint tempPoint = [_delBtn convertPoint:point fromView:self];
if ([_delBtn pointInside:tempPoint withEvent:event]) {
return _delBtn;
}
return view;
}
- ViewController
@interface ViewController ()
@property(nonatomic,strong)UICollectionViewFlowLayout *layout;
@property(nonatomic,strong)UICollectionView *collectionView;
@property(nonatomic,strong)UIImagePickerController *imagePickerController;
@property(nonatomic,copy)NSArray *data;
@property(nonatomic,copy)NSMutableArray *tempArray;
@property(nonatomic,assign)NSInteger deleteIndex;
@property(nonatomic,assign)BOOL edit; // 编辑状态
@end
- (void)viewDidLoad {
[super viewDidLoad];
_edit = NO;
[self tempArray];
[self data];
[self imagePickerController];
[self layout];
[self collectionView];
[_collectionView registerClass:[PhotoViewCell class] forCellWithReuseIdentifier:@"PhotoCellIdentifier"];
}
- 懒加载
#pragma mark - lazy method
-(NSMutableArray *)tempArray
{
if (!_tempArray) {
_tempArray = [[NSMutableArray alloc] init];
}
return _tempArray;
}
-(NSArray *)data
{
if (!_data) {
[_tempArray addObject:[UIImage imageNamed:@"add"]];
_data = [_tempArray mutableCopy];
[_tempArray removeAllObjects];
}
return _data;
}
-(UICollectionViewFlowLayout *)layout
{
if (!_layout) {
_layout = [[UICollectionViewFlowLayout alloc] init];
_layout.minimumLineSpacing = 10.0f; // item 纵间距
_layout.minimumInteritemSpacing = 10.0f; // item之间 行间距
}
return _layout;
}
-(UICollectionView *)collectionView
{
if (!_collectionView) {
_collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(10.0f, 64.0f, self.view.frame.size.width - 20.0f,200.0f) collectionViewLayout:_layout];
_collectionView.backgroundColor = [UIColor orangeColor];
_collectionView.delegate = self;
_collectionView.dataSource = self;
[self.view addSubview:_collectionView];
}
return _collectionView;
}
-(UIImagePickerController *)imagePickerController
{
if (!_imagePickerController) {
_imagePickerController = [[UIImagePickerController alloc] init];
}
return _imagePickerController;
}
#pragma mark - UICollectionViewDelegateFlowLayout
// 每个item的宽高
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
return CGSizeMake(60.0f, 60.0f);
}
//设置每个item的UIEdgeInsets
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
{
return UIEdgeInsetsMake(15.0f, 15.0f, 15.0f, 15.0f);
}
#pragma mark - UICollectionViewDataSource
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return _data.count;
}
- (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
PhotoViewCell *cell = (PhotoViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:@"PhotoCellIdentifier" forIndexPath:indexPath];
cell.tag = indexPath.row;
cell.photoImageView.image = _data[indexPath.row];
[cell.delBtn addTarget:self action:@selector(deleteClickAction:) forControlEvents:UIControlEventTouchUpInside];
if (indexPath.row == _data.count - 1) {
// 长按删除
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc ] initWithTarget:self action:@selector(longPressedAction)];
[cell.contentView addGestureRecognizer:longPress];
}
return cell;
}
#pragma mark - UICollectionViewDelegate
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
if (_edit) {
NSLog(@"indexPath - %ld",(long)indexPath.row);
} else {
if (indexPath.row == _data.count - 1) {
[self openPhotoLibrary];
// UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"选择图片" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
// UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
// NSLog(@"取消");
// }];
// UIAlertAction *albumAction = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
// NSLog(@"相册");
// }];
// UIAlertAction *photoAction = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
// NSLog(@"拍照");
// }];
// [alertController addAction:cancelAction];
// [alertController addAction:albumAction];
// [alertController addAction:photoAction];
// [self presentViewController:alertController animated:YES completion:nil];
}
}
}
// 打开相册
- (void)openPhotoLibrary
{
_imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
_imagePickerController.allowsEditing = YES;
_imagePickerController.delegate = self;
[self presentViewController:_imagePickerController animated:YES completion:NULL];
}
#pragma mark - UIImagePickerControllerDelegate
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
[_imagePickerController dismissViewControllerAnimated:YES completion:NULL];
// 判断获取类型：图片
if ([mediaType isEqualToString:@"public.image"]){
UIImage *theImage = nil;
// 判断，图片是否允许修改
if ([picker allowsEditing]){
//获取用户编辑之后的图像
theImage = [info objectForKey:UIImagePickerControllerEditedImage];
} else {
// 照片的元数据参数
theImage = [info objectForKey:UIImagePickerControllerOriginalImage] ;
}
_tempArray = [_data mutableCopy];
NSUInteger index = _tempArray.count - 1;
[_tempArray insertObject:theImage atIndex:index];
_data = [_tempArray mutableCopy];
[_tempArray removeAllObjects];
[_collectionView reloadData];
}
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[picker dismissViewControllerAnimated:YES completion:NULL];
}
//长按删除
-(void)longPressedAction
{
if (_data.count != 1) {
_edit = YES;
NSArray *array = [_collectionView visibleCells];
for (NSUInteger i = 0; i < array.count; i++) {
PhotoViewCell *cell = array[i];
if (cell.tag != (_data.count - 1)) {
cell.delBtn.hidden = NO;
// 晃动动画
[self animationViewCell:cell];
}
}
}
}
// 图片删除完成操作
-(void)cancelEdit
{
_edit = NO;
NSArray *array = [_collectionView subviews];
for (int i = 0; i < array.count; i ++) {
if ([array[i] isKindOfClass:[PhotoViewCell class]]) {
PhotoViewCell *cell = array[i];
cell.delBtn.hidden = YES;
// 晃动动画
[self animationViewCell:cell];
}
}
}
// 晃动动画
-(void)animationViewCell:(PhotoViewCell *)cell
{
//摇摆
if (_edit){
cell.transform = CGAffineTransformMakeRotation(-0.1);
[UIView animateWithDuration:0.8f delay:0.02f options:UIViewAnimationOptionRepeat|UIViewAnimationOptionAutoreverse|UIViewAnimationOptionAllowUserInteraction|UIViewAnimationOptionCurveLinear animations:^{
cell.transform = CGAffineTransformMakeRotation(0.1);
} completion:NULL];
} else {
[UIView animateWithDuration:0.25
delay:0.0
options:UIViewAnimationOptionAllowUserInteraction|UIViewAnimationOptionBeginFromCurrentState|UIViewAnimationOptionCurveEaseOut
animations:^{
cell.transform = CGAffineTransformIdentity;
} completion:nil];
}
}
-(void)deleteClickAction:(UIButton *)button
{
UIView *contentView = [button superview];
PhotoViewCell *cell = (PhotoViewCell *)[contentView superview];
NSIndexPath *indexPath = [_collectionView indexPathForCell:cell];
_tempArray = [_data mutableCopy];
[_tempArray removeObjectAtIndex:indexPath.row];
_data = [_tempArray mutableCopy];
[_tempArray removeAllObjects];
[_collectionView reloadData];
[self cancelEdit];
}