     ///
     ///  - returns: 回调闭包
     private var finishAction:((UIImage?)->Void)?
-    private static var imagePicker: TTImagePicker?
+    private static  var picker: TTImagePicker?
     ///  弹出ImagePicker
     ///
     ///  - parameter viewController: 当前控制器

        if UIImagePickerController.isSourceTypeAvailable(.Camera) {
            sheet.addAction(UIAlertAction(title: "拍照", style: .Default, handler: { (_) in
                let pickerVc = UIImagePickerController()
                pickerVc.delegate = TTImagePicker.imagePicker
                pickerVc.sourceType = .Camera
                pickerVc.allowsEditing = allowsEdited
                viewC.presentViewController(pickerVc, animated: true, completion: nil)

        }
        sheet.addAction(UIAlertAction(title: "从相机中选择", style: .Default, handler: { (_) in
            let pickerVc = UIImagePickerController()
            pickerVc.delegate = TTImagePicker.picker
            pickerVc.allowsEditing = allowsEdited
            viewC.presentViewController(pickerVc, animated: true, completion: nil)
        }))
        sheet.addAction(UIAlertAction(title: "取消", style:.Cancel, handler: { (_) in
            TTImagePicker.picker = nil
        }))
        viewC.presentViewController(sheet, animated: true, completion: nil)
    }
