IOS系统自带社交分享

 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    // 首先判断新浪分享是否可用
    if (![SLComposeViewController isAvailableForServiceType:SLServiceTypeSinaWeibo]) {
        return;
    }
    // 创建控制器，并设置ServiceType
    SLComposeViewController *composeVC = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeSinaWeibo];
    // 添加要分享的图片
    [composeVC addImage:[UIImage imageNamed:@"Snip20150429_9"]];
    // 添加要分享的文字
    [composeVC setInitialText:@"share my CSDN Blog"];
    // 添加要分享的url
    [composeVC addURL:[NSURL URLWithString:@"http://blog.csdn.net/u011058732"]];
    // 弹出分享控制器
    [self presentViewController:composeVC animated:YES completion:nil];
    // 监听用户点击事件
    composeVC.completionHandler = ^(SLComposeViewControllerResult result){
        if (result == SLComposeViewControllerResultDone) {
            NSLog(@"点击了发送");
        }
        else if (result == SLComposeViewControllerResultCancelled)
        {
            NSLog(@"点击了取消");
        }
    };
}