iOS 新浪微博-5.3 首页微博列表_集成图片浏览器

实际上，我们可以使用李明杰在教程里集成的MJPhotoBrowser，地址：

http://code4app.com/ios/快速集成图片浏览器/525e06116803fa7b0a000001

使用起来也很简单，只需要两步：

引入头文件：

#import "MJPhotoBrowser.h"
#import "MJPhoto.h"

给图片添加手势监听器及显示

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // 预先创建9个图片控件
        for (int i = 0; i<HMStatusPhotosMaxCount; i++) {
            HMStatusPhotoView *photoView = [[HMStatusPhotoView alloc] init];
            photoView.tag = i;
            [self addSubview:photoView];
            
            // 添加手势监听器（一个手势监听器 只能 监听对应的一个view）
            UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] init];
            [recognizer addTarget:self action:@selector(tapPhoto:)];
            [photoView addGestureRecognizer:recognizer];
        }
    }
    return self;
}

/**
 *  监听图片的点击
 */
- (void)tapPhoto:(UITapGestureRecognizer *)recognizer
{
    // 1.创建图片浏览器
    MJPhotoBrowser *browser = [[MJPhotoBrowser alloc] init];
    
    // 2.设置图片浏览器显示的所有图片
    NSMutableArray *photos = [NSMutableArray array];
    int count = self.pic_urls.count;
    for (int i = 0; i<count; i++) {
        HMPhoto *pic = self.pic_urls[i];
        
        MJPhoto *photo = [[MJPhoto alloc] init];
        // 设置图片的路径
        photo.url = [NSURL URLWithString:pic.bmiddle_pic];
        // 设置来源于哪一个UIImageView
        photo.srcImageView = self.subviews[i];
        [photos addObject:photo];
    }
    browser.photos = photos;
    
    // 3.设置默认显示的图片索引
    browser.currentPhotoIndex = recognizer.view.tag;
    
    // 3.显示浏览器
    [browser show];
}

但这个库是2013年的，现在已经停止更新了，当然存在很多BUG.因为，这个项目中，选用另一个集成图片浏览器SDPhotoBrowser，细看了一下，应该是基于李明杰的修改的。

code4app ： http://code4app.com/ios/SDPhotoBrowser/54db1e3f933bf0d44f8b5464

github : https://github.com/gsdios/SDPhotoBrowser

引用到项目中，使用方法和MJPhotoBrowser差不多。

头部引用

#import "SDPhotoBrowser.h"

给每个UIImageView设置手势

        photoView.tag = i;
        // 添加手势监听器（一个手势监听器 只能 监听对应的一个view）
        UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] init];
        [recognizer addTarget:self action:@selector(tapPhoto:)];
        [photoView addGestureRecognizer:recognizer];

实现相关的代码：

- (void)tapPhoto:(UITapGestureRecognizer *)recognizer
{
    SDPhotoBrowser *browser = [[SDPhotoBrowser alloc] init];
    browser.sourceImagesContainerView = self; // 原图的父控件
    browser.imageCount = self.photos.count; // 图片总数
    browser.currentImageIndex = recognizer.view.tag;
    browser.delegate =self; //self.subviews[recognizer.view.tag];
    [browser show];
}

#pragma mark - photobrowser代理方法

// 返回临时占位图片（即原来的小图）
- (UIImage *)photoBrowser:(SDPhotoBrowser *)browser placeholderImageForIndex:(NSInteger)index
{
    return  [(StatusPhotoView *)self.subviews[index] image];
}


// 返回高质量图片的url
- (NSURL *)photoBrowser:(SDPhotoBrowser *)browser highQualityImageURLForIndex:(NSInteger)index
{
    NSString *urlStr = [[self.photos[index] thumbnail_pic] stringByReplacingOccurrencesOfString:@"thumbnail" withString:@"bmiddle"];
    return [NSURL URLWithString:urlStr];
}

完整的代码结构

//
//  StatusPhotosView.m
//  Weibo
//
//  Created by jiangys on 15/10/25.
//  Copyright © 2015年 Jiangys. All rights reserved.
//

#import "StatusPhotosView.h"
#import "StatusPhotoView.h"
#import "Photo.h"
#import "SDPhotoBrowser.h"

#define StatusPhotoWH 70
#define StatusPhotoMargin 10
#define StatusPhotoMaxCol(count) ((count==4)?2:3)

@implementation StatusPhotosView

- (void)setPhotos:(NSArray *)photos
{
    _photos = photos;
    
    NSUInteger photosCount = photos.count;
    
    // 创建足够多的图片控制
    while (self.subviews.count < photosCount) {
        StatusPhotoView *photoView = [[StatusPhotoView alloc] init];
        [self addSubview:photoView];
    }
    
    // 遍历所有的图片控件，设置图片
    for (int i = 0; i < self.subviews.count; i++) {
        StatusPhotoView *photoView = self.subviews[i];
        
        if (i < photosCount) {
            photoView.photo = photos[i];
            photoView.hidden = NO;
        } else{
            photoView.hidden=YES;
        }
        
        photoView.tag = i;
        // 添加手势监听器（一个手势监听器 只能 监听对应的一个view）
        UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] init];
        [recognizer addTarget:self action:@selector(tapPhoto:)];
        [photoView addGestureRecognizer:recognizer];
    }
    
}

- (void)tapPhoto:(UITapGestureRecognizer *)recognizer
{
    SDPhotoBrowser *browser = [[SDPhotoBrowser alloc] init];
    browser.sourceImagesContainerView = self; // 原图的父控件
    browser.imageCount = self.photos.count; // 图片总数
    browser.currentImageIndex = recognizer.view.tag;
    browser.delegate =self; //self.subviews[recognizer.view.tag];
    [browser show];
}

#pragma mark - photobrowser代理方法

// 返回临时占位图片（即原来的小图）
- (UIImage *)photoBrowser:(SDPhotoBrowser *)browser placeholderImageForIndex:(NSInteger)index
{
    return  [(StatusPhotoView *)self.subviews[index] image];
}


// 返回高质量图片的url
- (NSURL *)photoBrowser:(SDPhotoBrowser *)browser highQualityImageURLForIndex:(NSInteger)index
{
    NSString *urlStr = [[self.photos[index] thumbnail_pic] stringByReplacingOccurrencesOfString:@"thumbnail" withString:@"bmiddle"];
    return [NSURL URLWithString:urlStr];
}


- (void)layoutSubviews
{
    [super layoutSubviews];
    
    // 设置图片的尺寸和位置
    NSUInteger photosCount = self.photos.count;
    int maxCol = StatusPhotoMaxCol(photosCount);
    for (int i = 0; i<photosCount; i++) {
        StatusPhotoView *photoView = self.subviews[i];
        
        int col = i % maxCol;
        photoView.x = col * (StatusPhotoWH + StatusPhotoMargin);
        
        int row = i / maxCol;
        photoView.y = row * (StatusPhotoWH + StatusPhotoMargin);
        photoView.width = StatusPhotoWH;
        photoView.height = StatusPhotoWH;
    }
}

+ (CGSize)sizeWithCount:(NSUInteger)count
{
    // 最大列数（一行最多有多少列）
    int maxCols = StatusPhotoMaxCol(count);
    
    NSUInteger cols = (count >= maxCols)? maxCols : count;
    CGFloat photosW = cols * StatusPhotoWH + (cols - 1) * StatusPhotoMargin;
    
    // 行数
    NSUInteger rows = (count + maxCols - 1) / maxCols;
    CGFloat photosH = rows * StatusPhotoWH + (rows - 1) * StatusPhotoMargin;
    
    return CGSizeMake(photosW, photosH);
}
@end

要注意，因为是UIImageView，想点击某个图片能交互，需要给UIImageView开启交互功能。

StatusPhotoView.m -- >initWithFrame

　　　　 // 开启交互
        self.userInteractionEnabled = YES;

最终效果：

章节源代码下载：http://pan.baidu.com/s/1qWtKrMG

新浪微博Github：https://github.com/jiangys/Weibo