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iOS UIActivityViewController原生多图

iOS UIActivityViewController原生多图

作者: 离离离离 | 来源:发表于2017-04-11 20:04 被阅读2582次

    前言:

    微信分享,友盟分享,sharesdk分享等等分享时,都只能一张图片带文字,做不到多图分享,这时候百度了一下资料就发现了iOS有一个原生控件UIActivityViewController,可以实现多图分享,在多图分享时不能带文字分享,微信分享扩展限制了。
    PS:如果分享的时候发现按钮只剩更多时,那就是你的图片有问题,图片不存在就会出现这种情况。
    记录一下代码,与大家共勉。

    效果图如下:

    分享一.jpeg 分享二.jpeg

    一、支持类型

    各个activity可以支持的数据类型


    支持的数据类型.png

    各个activity可以支持的数据类型名称

    UIKIT_EXTERN NSString *const UIActivityTypePostToFacebook     NS_AVAILABLE_IOS(6_0);  
    UIKIT_EXTERN NSString *const UIActivityTypePostToTwitter      NS_AVAILABLE_IOS(6_0);  
    UIKIT_EXTERN NSString *const UIActivityTypePostToWeibo        NS_AVAILABLE_IOS(6_0);    // SinaWeibo  
    UIKIT_EXTERN NSString *const UIActivityTypeMessage            NS_AVAILABLE_IOS(6_0);  
    UIKIT_EXTERN NSString *const UIActivityTypeMail               NS_AVAILABLE_IOS(6_0);  
    UIKIT_EXTERN NSString *const UIActivityTypePrint              NS_AVAILABLE_IOS(6_0);  
    UIKIT_EXTERN NSString *const UIActivityTypeCopyToPasteboard   NS_AVAILABLE_IOS(6_0);  
    UIKIT_EXTERN NSString *const UIActivityTypeAssignToContact    NS_AVAILABLE_IOS(6_0);  
    UIKIT_EXTERN NSString *const UIActivityTypeSaveToCameraRoll   NS_AVAILABLE_IOS(6_0);  
    UIKIT_EXTERN NSString *const UIActivityTypeAddToReadingList   NS_AVAILABLE_IOS(7_0);  
    UIKIT_EXTERN NSString *const UIActivityTypePostToFlickr       NS_AVAILABLE_IOS(7_0);  
    UIKIT_EXTERN NSString *const UIActivityTypePostToVimeo        NS_AVAILABLE_IOS(7_0);  
    UIKIT_EXTERN NSString *const UIActivityTypePostToTencentWeibo NS_AVAILABLE_IOS(7_0);  
    UIKIT_EXTERN NSString *const UIActivityTypeAirDrop            NS_AVAILABLE_IOS(7_0);  
    

    二、分享注意

    UIActivityViewController的功能非常简单,几行代码就可以实现分享。

    这个是最基础的文字带图片分享,适用于微博,但是有一些activity是不支持图片文字的分享,比如微信。
    NSString *textToShare = @"欢迎关注我!";
    UIImage *imageToShare = [UIImage imageNamed:@"wang.png"];
    NSArray *activityItems = @[urlToShare,textToShare,imageToShare];
    UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:_downImgsArr applicationActivities:nil];
    [self presentViewController:activityViewController animated:YES completion:nil];
    

    接下来就讲多图分享

    做多图分享的时候,分享的图片大小特别要注意,不能太大,一旦图片太大,就不能分享成功,所以有2种解决方式。
    (1)分享的类型为UIImage,很有可能会出现分享不成功的形式:当为UIImage时,图片一定不能太大,如果一定要用图片直接分享,先把图片压缩再进行分享。
    (2)第二种分享也是我推荐的方法,分享的类型为NSUrl:一定要先把图片下载后缓存到本地,把缓存的Url数组进行分享。但是这种方式需要自定义ActivitySource,不然也有可能出现分享不成功的情况。

    三、分享步骤

    第一种,分享类型为UIImage
    UIImage *imageToShare = [UIImage imageNamed:@"111.jpg"];
    UIImage *imageToShare1 = [UIImage imageNamed:@"222.jpg"];
    UIImage *imageToShare2= [UIImage imageNamed:@"333.jpg"];
    NSArray *itemArr = @[imageToShare,imageToShare1,imageToShare2];
    UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems: itemArr applicationActivities:nil];
     //去除特定的分享功能,excludedActivityTypes 去除哪些类型,这里把部分activity都给去除掉,只剩下相册和微信
    activityVC.excludedActivityTypes = @[UIActivityTypePostToFacebook,UIActivityTypePostToTwitter, UIActivityTypePostToWeibo,UIActivityTypeMessage,UIActivityTypeMail,UIActivityTypePrint,UIActivityTypeCopyToPasteboard,UIActivityTypeAssignToContact,UIActivityTypeSaveToCameraRoll,UIActivityTypeAddToReadingList,UIActivityTypePostToFlickr,UIActivityTypePostToVimeo,UIActivityTypePostToTencentWeibo,UIActivityTypeAirDrop,UIActivityTypeOpenInIBooks];
    [self presentViewController: activityVC animated:YES completion:nil];
    

    附:
    图片压缩代码http://blog.csdn.net/u014220518/article/details/53465631

    第二种,分享类型为NSUrl

    把图片写进缓存,把本机图片地址写进数组中

    1.activityItems这里是UIImage集合
    UIImage *imageToShare = [UIImage imageNamed:@"111.jpg"];
        UIImage *imageToShare1 = [UIImage imageNamed:@"222.jpg"];
        UIImage *imageToShare2= [UIImage imageNamed:@"333.jpg"];
        NSArray *activityItems = @[imageToShare,imageToShare1,imageToShare2];
        
        NSMutableArray *items = [NSMutableArray array];
        NSString *docPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
    
        for (int i = 0; i < activityItems.count; i++) {
            //图片缓存的地址,自己进行替换
            NSString *imagePath = [docPath stringByAppendingString:[NSString stringWithFormat:@"/ShareWX%d.jpg",i]];
            //把图片写进缓存,一定要先写入本地,不然会分享出错
            [UIImageJPEGRepresentation(activityItems[i], .5) writeToFile:imagePath atomically:YES];
            //把缓存图片的地址转成NSUrl格式
            NSURL *shareobj = [NSURL fileURLWithPath:imagePath];
            //这个部分是自定义ActivitySource
            ShareItem *item = [[ShareItem alloc] initWithData:activityItems[i] andFile:shareobj];
            //分享的数组
            [items addObject:item];
        }
    
    2.activityItems这里是地址链接集合
    /**
         图片数组为url的本机缓存地址
         url必须是图片的地址,不是网页的地址
    */
        NSArray *activityItems = @[
                                 @"http://img3.duitang.com/uploads/item/201604/24/20160424132044_ZzhuX.jpeg",
                                 @"http://v1.qzone.cc/avatar/201408/03/23/44/53de58e5da74c247.jpg%21200x200.jpg",
                                 @"http://img4.imgtn.bdimg.com/it/u=1483569741,1992390913&fm=214&gp=0.jpg"];
        NSMutableArray *items = [NSMutableArray array];
        NSString *docPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
        for (int i = 0; i < activityItems.count; i++) {
            //地址转码,取出地址
            NSString *URL = [activityItems[i] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
            //把图片转成NSData类型
             NSData * data = [NSData dataWithContentsOfURL:[NSURL URLWithString:URL]];
            //写入图片中
            UIImage *imagerang = [UIImage imageWithData:data];
            //图片缓存的地址,自己进行替换
            NSString *imagePath = [docPath stringByAppendingString:[NSString stringWithFormat:@"/ShareWX%d.jpg",i]];
            //把图片写进缓存,一定要先写入本地,不然会分享出错
            [UIImageJPEGRepresentation(imagerang, .5) writeToFile:imagePath atomically:YES];
            //把缓存图片的地址转成NSUrl格式
            NSURL *shareobj = [NSURL fileURLWithPath:imagePath];
            //这个部分是自定义ActivitySource
            ShareItem *item = [[ShareItem alloc] initWithData: imagerang andFile:shareobj];
            //分享的数组
            [items addObject:item];
        }
    
    3.通过UIActivityViewController进行分享
    UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems: items applicationActivities:nil];
     //去除特定的分享功能,excludedActivityTypes 去除哪些类型,这里把部分activity都给去除掉,只剩下相册和微信
    activityVC.excludedActivityTypes = @[UIActivityTypePostToFacebook,UIActivityTypePostToTwitter, UIActivityTypePostToWeibo,UIActivityTypeMessage,UIActivityTypeMail,UIActivityTypePrint,UIActivityTypeCopyToPasteboard,UIActivityTypeAssignToContact,UIActivityTypeSaveToCameraRoll,UIActivityTypeAddToReadingList,UIActivityTypePostToFlickr,UIActivityTypePostToVimeo,UIActivityTypePostToTencentWeibo,UIActivityTypeAirDrop,UIActivityTypeOpenInIBooks];
    [self presentViewController: activityVC animated:YES completion:nil];
    
    4.这个是自定义UIActivityItemSource对象

    ShareItem.h

    #import <Foundation/Foundation.h>
    
    @interface ShareItem : NSObject<UIActivityItemSource>
    
    -(instancetype)initWithData:(UIImage *)img andFile:(NSURL *)file;
    
    @property (nonatomic, strong) UIImage *img;
    @property (nonatomic, strong) NSURL *path;
    
    @end
    

    ShareItem.m

    #import "ShareItem.h"
    
    @implementation ShareItem
    
    -(instancetype)initWithData:(UIImage *)img andFile:(NSURL *)file
    {
        self = [super init];
        if (self) {
            _img = img;
            _path = file;
        }
        return self;
    }
    
    -(instancetype)init
    {
        //不期望这种初始化方式,所以返回nil了。
        return nil;
    }
    
    #pragma mark - UIActivityItemSource
    -(id)activityViewControllerPlaceholderItem:(UIActivityViewController *)activityViewController
    {
        return _img;
    }
    
    -(id)activityViewController:(UIActivityViewController *)activityViewController itemForActivityType:(NSString *)activityType
    {
        return _path;
    }
    
    -(NSString*)activityViewController:(UIActivityViewController *)activityViewController subjectForActivityType:(NSString *)activityType
    {
        // 这里对我这分享图好像没啥用....   是的 没啥用....
        return @"";
    }
    
    @end
    

    代码下载:http://code.cocoachina.com/view/134762

    感谢以下文章

    利用UIActivityController调用ios 系统自带的分享功能,实现微信发布多图的功能
    UIActivityViewController 调用微信分享的问题

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