// // SDPhotoBrowser.m // photobrowser // // Created by aier on 15-2-3. // Copyright (c) 2015年 aier. All rights reserved. // #import "SDPhotoBrowser.h" #import "UIImageView+WebCache.h" #import "SDBrowserImageView.h" // ============在这里方便配置样式相关设置=========== // || // || // || // \\// // \/ #import "SDPhotoBrowserConfig.h" // ============================================= @implementation SDPhotoBrowser { UIScrollView *_scrollView; BOOL _hasShowedFistView; UILabel *_indexLabel; UIButton *_saveButton; UIActivityIndicatorView *_indicatorView; BOOL _willDisappear; } - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { self.backgroundColor = SDPhotoBrowserBackgrounColor; } return self; } - (void)didMoveToSuperview { [self setupScrollView]; [self setupToolbars]; } - (void)dealloc { [[UIApplication sharedApplication].keyWindow removeObserver:self forKeyPath:@"frame"]; } - (void)setupToolbars { // 1. 序标 UILabel *indexLabel = [[UILabel alloc] init]; indexLabel.bounds = CGRectMake(0, 0, 80, 30); indexLabel.textAlignment = NSTextAlignmentCenter; indexLabel.textColor = [UIColor whiteColor]; indexLabel.font = [UIFont boldSystemFontOfSize:20]; indexLabel.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.5]; indexLabel.layer.cornerRadius = indexLabel.bounds.size.height * 0.5; indexLabel.clipsToBounds = YES; if (self.imageCount > 1) { indexLabel.text = [NSString stringWithFormat:@"1/%ld", (long)self.imageCount]; } _indexLabel = indexLabel; [self addSubview:indexLabel]; // 2.保存按钮 UIButton *saveButton = [[UIButton alloc] init]; [saveButton setTitle:@"保存" forState:UIControlStateNormal]; [saveButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; saveButton.backgroundColor = [UIColor colorWithRed:0.1f green:0.1f blue:0.1f alpha:0.90f]; saveButton.layer.cornerRadius = 5; saveButton.clipsToBounds = YES; [saveButton addTarget:self action:@selector(saveImage) forControlEvents:UIControlEventTouchUpInside]; _saveButton = saveButton; [self addSubview:saveButton]; } - (void)saveImage { int index = _scrollView.contentOffset.x / _scrollView.bounds.size.width; UIImageView *currentImageView = _scrollView.subviews[index]; UIImageWriteToSavedPhotosAlbum(currentImageView.image, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL); UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] init]; indicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge; indicator.center = self.center; _indicatorView = indicator; [[UIApplication sharedApplication].keyWindow addSubview:indicator]; [indicator startAnimating]; } - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo; { [_indicatorView removeFromSuperview]; UILabel *label = [[UILabel alloc] init]; label.textColor = [UIColor whiteColor]; label.backgroundColor = [UIColor colorWithRed:0.1f green:0.1f blue:0.1f alpha:0.90f]; label.layer.cornerRadius = 5; label.clipsToBounds = YES; label.bounds = CGRectMake(0, 0, 150, 30); label.center = self.center; label.textAlignment = NSTextAlignmentCenter; label.font = [UIFont boldSystemFontOfSize:17]; [[UIApplication sharedApplication].keyWindow addSubview:label]; [[UIApplication sharedApplication].keyWindow bringSubviewToFront:label]; if (error) { label.text = SDPhotoBrowserSaveImageFailText; } else { label.text = SDPhotoBrowserSaveImageSuccessText; } [label performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:1.0]; } - (void)setupScrollView { _scrollView = [[UIScrollView alloc] init]; _scrollView.delegate = self; _scrollView.showsHorizontalScrollIndicator = NO; _scrollView.showsVerticalScrollIndicator = NO; _scrollView.pagingEnabled = YES; [self addSubview:_scrollView]; for (int i = 0; i < self.imageCount; i++) { SDBrowserImageView *imageView = [[SDBrowserImageView alloc] init]; imageView.tag = i; // 单击图片 UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(photoClick:)]; // 双击放大图片 UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imageViewDoubleTaped:)]; doubleTap.numberOfTapsRequired = 2; [self addGestureRecognizer:doubleTap]; [singleTap requireGestureRecognizerToFail:doubleTap]; [imageView addGestureRecognizer:singleTap]; [imageView addGestureRecognizer:doubleTap]; [_scrollView addSubview:imageView]; } [self setupImageOfImageViewForIndex:self.currentImageIndex]; } // 加载图片 - (void)setupImageOfImageViewForIndex:(NSInteger)index { SDBrowserImageView *imageView = _scrollView.subviews[index]; self.currentImageIndex = index; if (imageView.hasLoadedImage) return; if ([self highQualityImageURLForIndex:index]) { [imageView setImageWithURL:[self highQualityImageURLForIndex:index] placeholderImage:[self placeholderImageForIndex:index]]; } else { imageView.image = [self placeholderImageForIndex:index]; } imageView.hasLoadedImage = YES; } - (void)photoClick:(UITapGestureRecognizer *)recognizer { _scrollView.hidden = YES; _willDisappear = YES; SDBrowserImageView *currentImageView = (SDBrowserImageView *)recognizer.view; NSInteger currentIndex = currentImageView.tag; UIView *sourceView = self.sourceImagesContainerView.subviews[currentIndex]; CGRect targetTemp = [self.sourceImagesContainerView convertRect:sourceView.frame toView:self]; UIImageView *tempView = [[UIImageView alloc] init]; tempView.contentMode = sourceView.contentMode; tempView.clipsToBounds = YES; tempView.image = currentImageView.image; CGFloat h = (self.bounds.size.width / currentImageView.image.size.width) * currentImageView.image.size.height; if (!currentImageView.image) { // 防止 因imageview的image加载失败 导致 崩溃 h = self.bounds.size.height; } tempView.bounds = CGRectMake(0, 0, self.bounds.size.width, h); tempView.center = self.center; [self addSubview:tempView]; _saveButton.hidden = YES; [UIView animateWithDuration:SDPhotoBrowserHideImageAnimationDuration animations:^{ tempView.frame = targetTemp; self.backgroundColor = [UIColor clearColor]; _indexLabel.alpha = 0.1; } completion:^(BOOL finished) { [self removeFromSuperview]; }]; } - (void)imageViewDoubleTaped:(UITapGestureRecognizer *)recognizer { SDBrowserImageView *imageView = (SDBrowserImageView *)recognizer.view; CGFloat scale; if (imageView.isScaled) { scale = 1.0; } else { scale = 2.0; } SDBrowserImageView *view = (SDBrowserImageView *)recognizer.view; [view doubleTapToZommWithScale:scale]; } - (void)layoutSubviews { [super layoutSubviews]; CGRect rect = self.bounds; rect.size.width += SDPhotoBrowserImageViewMargin * 2; _scrollView.bounds = rect; _scrollView.center = self.center; CGFloat y = 0; CGFloat w = _scrollView.frame.size.width - SDPhotoBrowserImageViewMargin * 2; CGFloat h = _scrollView.frame.size.height; [_scrollView.subviews enumerateObjectsUsingBlock:^(SDBrowserImageView *obj, NSUInteger idx, BOOL *stop) { CGFloat x = SDPhotoBrowserImageViewMargin + idx * (SDPhotoBrowserImageViewMargin * 2 + w); obj.frame = CGRectMake(x, y, w, h); }]; _scrollView.contentSize = CGSizeMake(_scrollView.subviews.count * _scrollView.frame.size.width, 0); _scrollView.contentOffset = CGPointMake(self.currentImageIndex * _scrollView.frame.size.width, 0); if (!_hasShowedFistView) { [self showFirstImage]; } _indexLabel.center = CGPointMake(self.bounds.size.width * 0.5, 35); _saveButton.frame = CGRectMake(30, self.bounds.size.height - 70, 50, 25); } - (void)show { UIWindow *window = [UIApplication sharedApplication].keyWindow; self.frame = window.bounds; [window addObserver:self forKeyPath:@"frame" options:0 context:nil]; [window addSubview:self]; } - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(UIView *)object change:(NSDictionary *)change context:(void *)context { if ([keyPath isEqualToString:@"frame"]) { self.frame = object.bounds; SDBrowserImageView *currentImageView = _scrollView.subviews[_currentImageIndex]; if ([currentImageView isKindOfClass:[SDBrowserImageView class]]) { [currentImageView clear]; } } } - (void)showFirstImage { UIView *sourceView = self.sourceImagesContainerView.subviews[self.currentImageIndex]; CGRect rect = [self.sourceImagesContainerView convertRect:sourceView.frame toView:self]; UIImageView *tempView = [[UIImageView alloc] init]; tempView.image = [self placeholderImageForIndex:self.currentImageIndex]; [self addSubview:tempView]; CGRect targetTemp = [_scrollView.subviews[self.currentImageIndex] bounds]; tempView.frame = rect; tempView.contentMode = [_scrollView.subviews[self.currentImageIndex] contentMode]; _scrollView.hidden = YES; [UIView animateWithDuration:SDPhotoBrowserShowImageAnimationDuration animations:^{ tempView.center = self.center; tempView.bounds = (CGRect){CGPointZero, targetTemp.size}; } completion:^(BOOL finished) { _hasShowedFistView = YES; [tempView removeFromSuperview]; _scrollView.hidden = NO; }]; } - (UIImage *)placeholderImageForIndex:(NSInteger)index { if ([self.delegate respondsToSelector:@selector(photoBrowser:placeholderImageForIndex:)]) { return [self.delegate photoBrowser:self placeholderImageForIndex:index]; } return nil; } - (NSURL *)highQualityImageURLForIndex:(NSInteger)index { if ([self.delegate respondsToSelector:@selector(photoBrowser:highQualityImageURLForIndex:)]) { return [self.delegate photoBrowser:self highQualityImageURLForIndex:index]; } return nil; } #pragma mark - scrollview代理方法 - (void)scrollViewDidScroll:(UIScrollView *)scrollView { int index = (scrollView.contentOffset.x + _scrollView.bounds.size.width * 0.5) / _scrollView.bounds.size.width; // 有过缩放的图片在拖动一定距离后清除缩放 CGFloat margin = 150; CGFloat x = scrollView.contentOffset.x; if ((x - index * self.bounds.size.width) > margin || (x - index * self.bounds.size.width) < - margin) { SDBrowserImageView *imageView = _scrollView.subviews[index]; if (imageView.isScaled) { [UIView animateWithDuration:0.5 animations:^{ imageView.transform = CGAffineTransformIdentity; } completion:^(BOOL finished) { [imageView eliminateScale]; }]; } } if (!_willDisappear) { _indexLabel.text = [NSString stringWithFormat:@"%d/%ld", index + 1, (long)self.imageCount]; } [self setupImageOfImageViewForIndex:index]; } @end // 版权属于原作者 // http://code4app.com (cn) http://code4app.net (en) // 发布代码于最专业的源码分享网站: Code4App.com