// // TFPhotoBrowser.m // TFPhotoBrowser // // Created by zhengwenming on 2018/1/2. // Copyright © 2018年 zhengwenming. All rights reserved. // #import "TFPhotoBrowser.h" #import "TFPhotoBrowserCell.h" #import "TFCollectionViewFlowLayout.h" @interface TFPhotoBrowser () @property(nonatomic ,assign) BOOL isHideNaviBar; @property(nonatomic ,strong) UICollectionView *collectionView; @property(nonatomic ,strong) UIPageControl *pageControl; @end @implementation TFPhotoBrowser - (BOOL)fullScreenGestureShouldBegin { return NO; } // 是否支持自动转屏 - (BOOL)shouldAutorotate { return NO; } // 支持哪些屏幕方向 - (UIInterfaceOrientationMask)supportedInterfaceOrientations { return UIInterfaceOrientationMaskAllButUpsideDown; } // 默认的屏幕方向（当前ViewController必须是通过模态出来的UIViewController（模态带导航的无效）方式展现出来的，才会调用这个方法） - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation { return UIInterfaceOrientationPortrait; } - (instancetype)init { if (self = [super init]) { if (@available(ios 11.0,*)) { // UIScrollView.appearance.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever; // UITableView.appearance.estimatedRowHeight = 0; // UITableView.appearance.estimatedSectionFooterHeight = 0; // UITableView.appearance.estimatedSectionHeaderHeight = 0; } else { if ([self respondsToSelector:@selector(automaticallyAdjustsScrollViewInsets)]) { self.automaticallyAdjustsScrollViewInsets = NO; } } } return self; } - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; [self.navigationController setNavigationBarHidden:NO animated:YES]; } - (void)deleteTheImage:(UIBarButtonItem *)sender { if (self.dataSource.count == 1) { [self.dataSource removeObjectAtIndex:self.currentPhotoIndex]; [self.navigationController popViewControllerAnimated:YES]; } else { [self.dataSource removeObjectAtIndex:self.currentPhotoIndex]; self.title = [NSString stringWithFormat:@"%@/%@", [TFUtilsHelper formatStringWithInteger:self.currentPhotoIndex + 1], [TFUtilsHelper formatStringWithInteger:self.dataSource.count]]; [self.collectionView reloadData]; } __weak typeof(self) weakSelf = self; if (self.deleteBlock) { self.deleteBlock(weakSelf.dataSource, weakSelf.currentPhotoIndex, weakSelf.collectionView); } } - (UICollectionView *)collectionView { if (_collectionView == nil) { TFCollectionViewFlowLayout *layout = [[TFCollectionViewFlowLayout alloc] init]; layout.imgaeGap = 20; _collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) collectionViewLayout:layout]; _collectionView.backgroundColor = [UIColor blackColor]; _collectionView.dataSource = self; _collectionView.delegate = self; _collectionView.pagingEnabled = YES; _collectionView.scrollsToTop = NO; [_collectionView registerClass:[TFPhotoBrowserCell class] forCellWithReuseIdentifier:@"TFPhotoBrowserCell"]; _collectionView.showsHorizontalScrollIndicator = NO; _collectionView.contentOffset = CGPointMake(0, 0); _collectionView.contentSize = CGSizeMake(self.view.frame.size.width * self.dataSource.count, self.view.frame.size.height); } return _collectionView; } // 视图发生了大小改变的时候会调用此方法 大小改变 == 横竖切换 - (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id)coordinator { if ([UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeLeft || [UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeRight) { self.collectionView.frame = CGRectMake(0, 0, size.width, size.height); self.pageControl.frame = CGRectMake(0, size.height - 30, size.width, 30); self.pageControl.centerX = self.view.centerX; } else { self.collectionView.frame = CGRectMake(0, 0, size.width, size.height); self.pageControl.frame = CGRectMake(0, size.height - 30, size.width, 30); self.pageControl.centerX = self.view.centerX; } } - (void)viewDidLoad { [super viewDidLoad]; if (self.downLoadNeeded) { UIButton *saveImageBtn = [UIButton buttonWithType:UIButtonTypeCustom]; saveImageBtn.frame = CGRectMake(0, 0, 40, 40); saveImageBtn.autoresizingMask = UIViewAutoresizingFlexibleHeight; [saveImageBtn setImage:[UIImage imageNamed:@"savePicture"] forState:UIControlStateNormal]; [saveImageBtn setImage:[UIImage imageNamed:@"savePicture"] forState:UIControlStateHighlighted]; [saveImageBtn addTarget:self action:@selector(saveImage) forControlEvents:UIControlEventTouchUpInside]; self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:saveImageBtn]; } else if(self.deleteNeeded) { self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemTrash target:self action:@selector(deleteTheImage:)]; } self.title = self.title ? self.title : [NSString stringWithFormat:@"%@/%@", [TFUtilsHelper formatStringWithInteger:self.currentPhotoIndex + 1], [TFUtilsHelper formatStringWithInteger:self.dataSource.count]]; self.view.backgroundColor = [UIColor blackColor]; self.isHideNaviBar = NO; [self.view addSubview:self.collectionView]; if (self.dataSource.count) { [self.collectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForRow:(self.currentPhotoIndex) inSection:0] atScrollPosition:UICollectionViewScrollPositionLeft animated:NO]; } [self.view addSubview:self.pageControl]; self.pageControl.numberOfPages = self.dataSource.count; self.pageControl.currentPage = self.currentPhotoIndex; } - (UIPageControl *)pageControl { if (!_pageControl) { _pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height-30, self.view.frame.size.width, 30)]; _pageControl.numberOfPages = 5; _pageControl.pageIndicatorTintColor = [UIColor darkGrayColor]; _pageControl.currentPageIndicatorTintColor = [UIColor whiteColor]; _pageControl.backgroundColor = [UIColor clearColor]; } return _pageControl; } - (void)saveImage { dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ NSIndexPath *indexPath = [NSIndexPath indexPathForItem:self.currentPhotoIndex inSection:0]; dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ TFPhotoBrowserCell *currentCell = (TFPhotoBrowserCell *)[self.collectionView cellForItemAtIndexPath:indexPath]; UIImageWriteToSavedPhotosAlbum(currentCell.imageView.image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil); }); }); } - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { if (error) { [TFPromptManager showPromptViewWithStatus:TFPromptStatusError promptTitle:TFLocalizedString(@"保存失败")]; } else { [TFPromptManager showPromptViewWithStatus:TFPromptStatusSuccess promptTitle:TFLocalizedString(@"保存成功")]; } __weak typeof(self) weakSelf = self; if (self.downLoadBlock) { self.downLoadBlock(weakSelf.dataSource,image,error); } } #pragma mark - UIScrollViewDelegate - (void)scrollViewDidScroll:(UIScrollView *)scrollView { // if (self.currentPhotoIndex==0) { // scrollView.bounces = NO; // }else{ // scrollView.bounces = YES; // } } - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { if ([self.title isEqualToString:TFLocalizedString(@"图片预览")]) { } else { CGPoint offSet = scrollView.contentOffset; self.currentPhotoIndex = offSet.x / self.view.width; self.title = [NSString stringWithFormat:@"%@/%@", [TFUtilsHelper formatStringWithInteger:self.currentPhotoIndex + 1], [TFUtilsHelper formatStringWithInteger:self.dataSource.count]]; self.pageControl.currentPage = self.currentPhotoIndex; } } - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section { return self.dataSource.count; } - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { TFPhotoBrowserCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"TFPhotoBrowserCell" forIndexPath:indexPath]; cell.model = self.dataSource[indexPath.row]; WS(weakSelf) if (!cell.singleTapGestureBlock) { cell.singleTapGestureBlock = ^(){ if (weakSelf.isHideNaviBar == YES) { [weakSelf.navigationController setNavigationBarHidden:NO animated:YES]; } else { [weakSelf.navigationController setNavigationBarHidden:YES animated:YES]; } weakSelf.isHideNaviBar = !weakSelf.isHideNaviBar; [weakSelf dismissViewControllerAnimated:YES completion:^{ }]; }; } if (!cell.longPressGestureBlock) { __weak typeof(self) weakSelf = self; cell.longPressGestureBlock = ^(TFPhotoBrowserCell *cell) { UIAlertController *actionSheet = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet]; if (is_iPad) { UIPopoverPresentationController *popover = actionSheet.popoverPresentationController; if (popover) { popover.sourceView = weakSelf.view; popover.sourceRect = weakSelf.view.bounds; popover.permittedArrowDirections = UIPopoverArrowDirectionDown; } } [actionSheet addAction:[UIAlertAction actionWithTitle:TFLocalizedString(@"保存到相册") style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) { UIImageWriteToSavedPhotosAlbum(cell.imageView.image, weakSelf, @selector(image:didFinishSavingWithError:contextInfo:), nil); }]]; [actionSheet addAction:[UIAlertAction actionWithTitle:TFLocalizedString(@"取消") style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) { NSLog(@"取消"); }]]; [weakSelf presentViewController:actionSheet animated:YES completion:nil]; }; } cell.currentIndexPath = indexPath; self.title = [NSString stringWithFormat:@"%@/%@", [TFUtilsHelper formatStringWithInteger:self.currentPhotoIndex + 1], [TFUtilsHelper formatStringWithInteger:self.dataSource.count]]; return cell; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } @end