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+//
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+// NewPhotoPreviewController.m
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+// RA Image
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+//
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+// Created by Jack on 2017/6/14.
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+// Copyright © 2017年 USAI. All rights reserved.
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+//
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+
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+#import "ContentPreviewController.h"
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+#import "PhotoPreviewCell.h"
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+#import "VideoPreviewCell.h"
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+
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+#import "iSalesDB.h"
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+#import "AppDelegate.h"
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+
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+
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+@interface ContentPreviewController ()<UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout>
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+
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+@property (strong, nonatomic) IBOutlet UILabel *indicator;
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+@property (strong, nonatomic) IBOutlet UICollectionView *previewContainer;
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+
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+@property (nonatomic,strong) NSArray *photos;
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+
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+@property (nonatomic,strong) UIScrollView *mask;
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+
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+@property (nonatomic,assign) BOOL hideNavigationBar;
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+
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+@end
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+
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+@implementation ContentPreviewController
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+
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+- (void)viewDidLoad {
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+ [super viewDidLoad];
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+ // Do any additional setup after loading the view.
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+// self.automaticallyAdjustsScrollViewInsets = NO;
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+// self.navigationController.navigationBar.translucent = NO;
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+// self.edgesForExtendedLayout = UIRectEdgeNone;
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+
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+ UIView *v = [UIView new];
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+ [self.view insertSubview:v atIndex:0];
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+
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+ NSMutableArray *tmpArr = [NSMutableArray array];
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+ int count = [[self.content objectForKey:@"count"] intValue];
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+ for (int i = 0; i < count; i++) {
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+ NSDictionary *item = [self.content objectForKey:[NSString stringWithFormat:@"item_%d",i]];
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+ [tmpArr addObject:item];
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+ }
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+ self.photos = [tmpArr copy];
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+
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+ self.indicator.layer.cornerRadius = 20;
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+ self.indicator.layer.masksToBounds = YES;
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+
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+ self.previewContainer.pagingEnabled = YES;
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+ NSString *offset = [NSString stringWithFormat:@"%lu / %lu",(unsigned long)self.currentIndex + 1,(unsigned long)self.photos.count];
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+ self.indicator.text = offset;
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+
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+
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+ self.hideNavigationBar = self.navigationController.isNavigationBarHidden;
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+
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+ self.navigationController.navigationBarHidden = YES;
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+
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+}
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+
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+- (void)viewDidLayoutSubviews {
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+ [super viewDidLayoutSubviews];
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+
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+
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+ if (self.currentIndex > 0) {
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+ [self.previewContainer scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:self.currentIndex inSection:0] atScrollPosition:16 animated:YES];
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+ }
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+
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+}
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+
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+- (void)viewDidAppear:(BOOL)animated {
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+ [super viewDidAppear:animated];
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+}
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+
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+- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
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+
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+ // 重新布局 Item 大小
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+ [self.previewContainer.collectionViewLayout invalidateLayout];
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+
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+ // 重新布局Item位置
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+ [self.previewContainer scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:self.currentIndex inSection:0] atScrollPosition:32 animated:NO];
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+
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+}
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+
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+- (void)didReceiveMemoryWarning {
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+ [super didReceiveMemoryWarning];
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+ // Dispose of any resources that can be recreated.
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+}
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+
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+
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+#pragma mark - Setter
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+
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+- (void)setCurrentIndex:(NSUInteger)currentIndex {
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+ _currentIndex = currentIndex;
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+ NSString *offset = [NSString stringWithFormat:@"%lu / %lu",(unsigned long)self.currentIndex + 1,(unsigned long)self.photos.count];
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+ self.indicator.text = offset;
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+}
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+
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+#pragma mark - FlowLayout Delegate
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+
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+- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
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+ return collectionView.bounds.size;
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+}
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+
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+- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section {
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+ return 0;
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+}
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+
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+- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {
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+ return 0;
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+}
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+
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+- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
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+ return UIEdgeInsetsZero;
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+}
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+
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+#pragma mark - CollectionView Delegate
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+
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+- (void)collectionView:(UICollectionView *)collectionView willDisplayCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath {
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+
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+
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+ NSDictionary *item = [self.photos objectAtIndex:indexPath.row];
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+ NSString *type = [item objectForKey:@"type"];
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+
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+ if ([type isEqualToString:@"image"]) {
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+ PhotoPreviewCell *preCell = (PhotoPreviewCell *)cell;
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+
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+ [self photoCell:preCell loadImage:item];
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+
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+// preCell.scrollView.backgroundColor = [UIColor colorWithRed:(rand() % 255) / 255.0 green:(rand() % 255) / 255.0 blue:(rand() % 255) / 255.0 alpha:1];
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+
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+ } else if ([type isEqualToString:@"video"]) {
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+
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+ VideoPreviewCell *videoCell = (VideoPreviewCell *)cell;
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+ videoCell.item = item;
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+// videoCell.playerView.webView.backgroundColor = [UIColor colorWithRed:(rand() % 255) / 255.0 green:(rand() % 255) / 255.0 blue:(rand() % 255) / 255.0 alpha:1];
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+
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+ }
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+}
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+
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+- (void)collectionView:(UICollectionView *)collectionView didEndDisplayingCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath {
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+
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+ NSDictionary *item = [self.photos objectAtIndex:indexPath.row];
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+ NSString *type = [item objectForKey:@"type"];
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+
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+ if ([type isEqualToString:@"image"]) {
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+ PhotoPreviewCell *preCell = (PhotoPreviewCell *)cell;
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+ UIScrollView *sc = preCell.scrollView;
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+ sc.zoomScale = 1;
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+ sc.contentSize = CGSizeZero;
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+ sc.contentOffset = CGPointZero;
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+ } else if ([type isEqualToString:@"video"]) {
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+
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+ VideoPreviewCell *videoCell = (VideoPreviewCell *)cell;
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+
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+ [videoCell.playerView pauseVideo];
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+ }
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+}
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+
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+
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+#pragma mark - CollectionView DataSource
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+
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+- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
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+ return self.photos.count;
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+}
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+
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+- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
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+
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+ NSDictionary *item = [self.photos objectAtIndex:indexPath.row];
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+ NSString *type = [item objectForKey:@"type"];
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+
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+ if ([type isEqualToString:@"image"]) {
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+
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+ PhotoPreviewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"PhotoPreviewCell" forIndexPath:indexPath];
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+ cell.scrollView.delegate = self;
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+ return cell;
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+
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+ } else if ([type isEqualToString:@"video"]) {
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+
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+ VideoPreviewCell *videoCell = [collectionView dequeueReusableCellWithReuseIdentifier:@"VideoPreviewCell" forIndexPath:indexPath];
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+ videoCell.playerView.webView.backgroundColor = [UIColor blackColor];
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+ return videoCell;
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+ }
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+
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+ return nil;
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+}
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+
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+#pragma mark - ScrollView Delegate
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+
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+- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
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+ if (scrollView == self.previewContainer) {
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+ CGFloat x = scrollView.contentOffset.x / scrollView.frame.size.width;
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+ int idx = (int)x;
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+ if (idx == x) {
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+ if (self.currentIndex != idx) {
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+ self.currentIndex = idx;
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+ }
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+ }
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+ }
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+}
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+
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+- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
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+ if (scrollView != self.previewContainer) {
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+ return scrollView.subviews.firstObject;
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+ }
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+ return nil;
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+}
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+
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+- (void)scrollViewDidZoom:(UIScrollView *)scrollView {
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+
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+ if (self.previewContainer != scrollView) {
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+
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+
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+ }
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+}
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+
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+#pragma mark - Private
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+
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+
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+- (void) photoCell:(PhotoPreviewCell *)cell loadImage:(NSDictionary *)item_json {
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+
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+ AppDelegate *appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
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+
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+ NSString* img_url = [item_json valueForKey:@"s"];
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+ NSString* type = item_json[@"type"];
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+
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+ NSString* file_name=[img_url lastPathComponent];
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+ NSData* img_data=nil;
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+
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+ // 加载Image
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+ if([type isEqualToString:@"video"])
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+ {
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+ img_data = UIImagePNGRepresentation([UIImage imageNamed:@"play"]);
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+ }
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+ else
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+ {
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+ if([item_json[@"is_localfile"] boolValue])
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+ img_data = [NSData dataWithContentsOfFile:img_url];
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+ else
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+ [iSalesDB load_cached_img:file_name loadFrom:img_url];
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+ }
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+
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+ // 设置Image
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+ if(img_data!=nil)
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+ {
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+ dispatch_async(dispatch_get_main_queue(), ^{
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+ UIImage * img =[UIImage imageWithData:img_data];
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+
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+ [cell setPhoto:img];
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+
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+ });
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+ }
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+ else
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+ {
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+ NSData* downloadimg_data = nil;
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+ if (!appDelegate.offline_mode) {
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+ downloadimg_data = [NSData dataWithContentsOfURL:[NSURL URLWithString:img_url]];
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+ }
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+ dispatch_async(dispatch_get_main_queue(), ^{
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+
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+
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+
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+ if(downloadimg_data!=nil)
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+ {
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+
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+ [iSalesDB cache_img:downloadimg_data filename:file_name saveTo:img_url];
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+
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+ UIImage * img =[UIImage imageWithData:downloadimg_data];
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+ [cell setPhoto:img];
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+
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+
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+ }
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+ else
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+ {
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+
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+
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+ UIImage * img =[UIImage imageNamed:@"notfound_l"];
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+ [cell setPhoto:img];
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+
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+
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+ }
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+
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+ });
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+ }
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+
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+}
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+
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+- (IBAction)closeBtnClick:(UIButton *)sender {
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+
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+ self.navigationController.navigationBarHidden = self.hideNavigationBar;
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+ [self.navigationController popViewControllerAnimated:YES];
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+
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+}
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+
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+
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+@end
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Pen Li