UMeng将当前页面转为图片然后分享

// iphone 截屏方法

- (UIImage *)imageFromView:(UIView *)theView
{
    UIGraphicsBeginImageContext(theView.frame.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    [theView.layer renderInContext: context];
    UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return theImage;
}

当需要将当前界面转化为image时，调用上述方法

//如果需要分享回调，请将delegate对象设置self，并实现下面的回调方法

- (void)shareUM
{ 
    [UMSocialData defaultData].extConfig.title = @"分享的title";
    [UMSocialData defaultData].extConfig.qqData.url = @"http://baidu.com";
    [UMSocialSnsService presentSnsIconSheetView:self
                                     appKey:@"507fcab25270157b37000010"
                                  shareText:@"友盟社会化分享让您快速实现分享等社会化功能，http://umeng.com/social"
                                 shareImage:[self imageFromView:self.view];
                            shareToSnsNames:@[UMShareToWechatSession,UMShareToWechatTimeline,UMShareToSina,UMShareToQQ,UMShareToQzone]
                                   delegate:self]; 
}