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

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