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

通过一番查找以后找到一个类UIActivityController,可以调用系统的social.framework中的分享接口。看下面的图就知道了，这个还是挺常见的

微信发布多图

借鉴了CSDN上的一个demo，

里面自定义了一个实现UIActivityItemSource协议的类 ShareItem

//
//  SharedItem.h
//  xingjiang
//
//  Created by 吴德明 on 16/7/14.
//  Copyright © 2016年 吴德明. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>


@interface SharedItem : NSObject<UIActivityItemSource>

-(instancetype)initWithData:(UIImage*)img andFile:(NSURL*)file;

@property (nonatomic, strong) UIImage *img;
@property (nonatomic, strong) NSURL *path;

@end

实现文件

//
//  SharedItem.m
//  xingjiang
//
//  Created by 吴德明 on 16/7/14.
//  Copyright © 2016年 吴德明. All rights reserved.
//

#import "SharedItem.h"

@implementation SharedItem

-(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 @"";
}

实际调用的代码

//
//  ViewController.m
//  ShareItemWX
//
//  Created by 吴德明 on 16/7/14.
//  Copyright © 2016年 吴德明. All rights reserved.
//

#import "ViewController.h"
#import "SharedItem.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    
    UIButton *Button = [UIButton buttonWithType:UIButtonTypeCustom];
    Button.frame = CGRectMake(0, 0, 100, 100);
    Button.center = self.view.center;
    Button.backgroundColor = [UIColor blueColor];
    [Button setTitle:@"分享到微信" forState:UIControlStateNormal];
    [Button addTarget:self action:@selector(shareWX) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:Button];
    
    
    
}

 /** 分享到微信 以九宫格的方式*/
-(void)shareWX{
     /** 图片网址数组*/
    NSArray *array_photo = @[@"http://img.meifajia.com/o1aneipt09eCl5bqQp4ifbQdTHlKIJfq.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneipt2fbZm38Zct4DH92p-ez7-fXt.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneiocd24Y6jK8uQA8-8y-47H6vRe7.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneiocdd94h6ld4kQJh8PcpjGSkORS.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneiocdd94h6ld4kQJh8PcpjGSkORS.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneipt09eCl5bqQp4ifbQdTHlKIJfq.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneioccpacV1LVg2AfG9fbYl8zN1So.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneipt0haf1zwepSkxx9okI0W34t05.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneipt09eCl5bqQp4ifbQdTHlKIJfq.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneipt09eCl5bqQp4ifbQdTHlKIJfq.jpg?imageView2/1/w/360/h/480/q/85",@"http://img.meifajia.com/o1aneipt09eCl5bqQp4ifbQdTHlKIJfq.jpg?imageView2/1/w/360/h/480/q/85"];
    
    
    
    NSMutableArray *array = [[NSMutableArray alloc]init];
    for (int i = 0; i <8 && i<array_photo.count; i++) {
        NSString *URL = array_photo[i];
        NSData * data = [NSData dataWithContentsOfURL:[NSURL URLWithString:URL]];
        UIImage *imagerang = [UIImage imageWithData:data];
        
        NSString *path_sandox = NSHomeDirectory();
        NSString *imagePath = [path_sandox stringByAppendingString:[NSString stringWithFormat:@"/Documents/ShareWX%d.jpg",i]];
        [UIImagePNGRepresentation(imagerang) writeToFile:imagePath atomically:YES];
        
        NSURL *shareobj = [NSURL fileURLWithPath:imagePath];
        
         /** 这里做个解释 imagerang : UIimage 对象  shareobj:NSURL 对象 这个方法的实际作用就是 在调起微信的分享的时候 传递给他 UIimage对象,在分享的时候 实际传递的是 NSURL对象 达到我们分享九宫格的目的 */
        
        SharedItem *item = [[SharedItem alloc] initWithData:imagerang andFile:shareobj];
        
        [array addObject:item];
    }

    
    UIActivityViewController *activityViewController =[[UIActivityViewController alloc] initWithActivityItems:array
                                                                                        applicationActivities:nil];
    
    //尽量不显示其他分享的选项内容
    
    activityViewController.excludedActivityTypes = @[ UIActivityTypePostToFacebook,UIActivityTypePostToTwitter, UIActivityTypePostToWeibo, UIActivityTypeMessage,UIActivityTypeMail,UIActivityTypePrint,UIActivityTypeCopyToPasteboard,UIActivityTypeAssignToContact,UIActivityTypeSaveToCameraRoll,UIActivityTypeAddToReadingList,UIActivityTypePostToFlickr,UIActivityTypePostToVimeo,UIActivityTypePostToTencentWeibo,UIActivityTypeAirDrop,UIActivityTypeOpenInIBooks];
    
    if (activityViewController) {
          [self presentViewController:activityViewController animated:TRUE completion:nil];
    }

   
    

}





@end

最终效果