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