         return sv
         }()
     /// 图像视图
-    lazy var imageView : UIImageView = {
+    private lazy var imageView : UIImageView = {
         let iv = UIImageView()
         return iv
         }()

/// 触发dismiss的Scale大小
private var dismissScale : CGFloat = 1.0
/// 图片占位图
private var placeHolderName : String = "placeHolder"
            largeURL = photo?.largeURL
        }
    }
    private lazy var activity : ActivityView = {
        let activity = ActivityView(frame: CGRectMake(0, 0, 44, 44))
        activity.layer.cornerRadius = 22
        activity.layer.masksToBounds = true
        activity.backgroundColor = activityBackgroundColor
        activity.lineWidth = activityLineWidth
        activity.lineColor = activityLineColor
        activity.center = CGPointMake(UIScreen.mainScreen().bounds.width * 0.5, UIScreen.mainScreen().bounds.height * 0.5)
        
        self.view.addSubview(activity)
        return activity
    }()
    /// 滚动视图
    private lazy var scrollView : UIScrollView = {
        let sv = UIScrollView(frame: UIScreen.mainScreen().bounds)
        // 设置代理
        sv.delegate = self
