iOS:第三方框架MJPhotoBrowser图片浏览器的使用
介绍：MJPhotoBrowser这个第三方库是MJ老师封装的一套用来浏览图片的浏览器，可是是本地图片、网络图片、gif图片等，其也依赖了SDWebImage、SVProgressHUD、YLGIFImage这些三方库，因为高度封装，所以集成起来比较简单，貌似已经停止更新并卸下了。下面看一些几个重要的类：
MJPhotoBrowser框架：http://files.cnblogs.com/files/XYQ-208910/MJPhotoBrowser.zip
图片模型类MJPhoto
MJPhoto.h
#import <UIKit/UIKit.h> #import <Foundation/Foundation.h> #import <QuartzCore/QuartzCore.h> #import <YLGIFImage/YLImageView.h> #import <YLGIFImage/YLGIFImage.h> #import <SDWebImage/UIImageView+WebCache.h> #import <SVProgressHUD/SVProgressHUD.h> @interface MJPhoto : NSObject @property (nonatomic, strong) NSURL *url; //图片链接 @property (nonatomic, strong) UIImage *image; // 完整的图片 @property (nonatomic, strong) UIImageView *srcImageView; // 来源view @property (nonatomic, strong, readonly) UIImage *placeholder; //占位图片 @property (nonatomic, strong, readonly) UIImage *capture; //截图 // 是否已经保存到相册 @property (nonatomic, assign) BOOL save; @property (nonatomic, assign) int index; // 索引 @end
MJPhoto.m
#import "MJPhoto.h" @implementation MJPhoto #pragma mark - 截图 - (UIImage *)capture:(UIView *)view { UIGraphicsBeginImageContextWithOptions(view.bounds.size, YES, 0.0); [view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return img; } - (void)setSrcImageView:(UIImageView *)srcImageView { _srcImageView = srcImageView; _placeholder = srcImageView.image; if (srcImageView.clipsToBounds) { _capture = [self capture:srcImageView]; } } @end
预览器类MJPhotoBrowser
MJPhotoBrowser.h
#import "MJPhoto.h" @protocol MJPhotoBrowserDelegate; @interface MJPhotoBrowser : NSObject <UIScrollViewDelegate> // 所有的图片对象 @property (nonatomic, strong) NSArray *photos; // 当前展示的图片索引 @property (nonatomic, assign) NSUInteger currentPhotoIndex; // 保存按钮 @property (nonatomic, assign) NSUInteger showSaveBtn; // 显示图片 - (void)show; @end
集成过来使用的方法：
1.本地图片
-(void)addImage:(UIImage *)image { [self.photos addObject:image]; UIImageView *imageView = [[UIImageView alloc]initWithImage:image]; imageView.contentMode = UIViewContentModeScaleToFill; imageView.userInteractionEnabled = YES; [imageView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(photoTap:)]]; [self addSubview:imageView]; } //点击预览图片 - (void)photoTap:(UITapGestureRecognizer *)recognizer { //1.创建图片浏览器 NSMutableArray *kjphotos = [NSMutableArray array]; MJPhotoBrowser *brower = [[MJPhotoBrowser alloc] init]; //2.告诉图片浏览器显示所有的图片 for (int i = 0 ; i < self.photos.count; i++) { //传递数据给浏览器 MJPhoto *photo = [[MJPhoto alloc] init]; photo.image = self.photos[i]; photo.srcImageView = self.subviews[i]; //设置来源哪一个UIImageView [kjphotos addObject:photo]; } brower.photos = kjphotos; //3.设置默认显示的图片索引 brower.currentPhotoIndex = recognizer.view.tag; //4.显示浏览器 [brower show]; }
2.网络图片
//监听图片的点击 - (void)tapPhoto:(UITapGestureRecognizer *)recognizer { //1.创建图片浏览器 MJPhotoBrowser *brower = [[MJPhotoBrowser alloc] init]; //2.告诉图片浏览器显示所有的图片 NSMutableArray *photos = [NSMutableArray array]; for (int i = 0 ; i < self.photos.count; i++) { Photo *pic = self.photos[i]; //传递数据给浏览器 MJPhoto *photo = [[MJPhoto alloc] init]; photo.url = [NSURL URLWithString:pic.bmiddle_pic]; photo.srcImageView = self.subviews[i]; //设置来源哪一个UIImageView [photos addObject:photo]; } brower.photos = photos; //3.设置默认显示的图片索引 brower.currentPhotoIndex = recognizer.view.tag; //4.显示浏览器 [brower show]; }
程序猿神奇的手，每时每刻，这双手都在改变着世界的交互方式！
本文转自当天真遇到现实博客园博客，原文链接：http://www.cnblogs.com/XYQ-208910/p/5283103.html
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