我的數據源方法從未因爲某種原因調用

Question

即時通訊使用稱爲RSKImageCropView的小型庫，它有Delegate和DataSource方法。代表呼籲作爲expecterd，但數據源不。

這是我如何配置它：

let someImage = UIImage(data: blob) 

    let controller: RSKImageCropViewController = RSKImageCropViewController(image: someImage!, cropMode: RSKImageCropMode.Circle) 
    controller.delegate = self 
    controller.dataSource = self 
    self.navigationController?.pushViewController(controller, animated: true) 

這裏是委託和數據源的方法：

extension GameViewController: RSKImageCropViewControllerDataSource { 
    func imageCropViewControllerCustomMaskRect(controller: RSKImageCropViewController) -> CGRect { 

     let rect = CGRect(x: 30, y: 30, width: 30, height: 30) 
     return rect 

    } 

    func imageCropViewControllerCustomMovementRect(controller: RSKImageCropViewController) -> CGRect { 
     return controller.maskRect 
    } 

    func imageCropViewControllerCustomMaskPath(controller: RSKImageCropViewController) -> UIBezierPath { 
     let rect = controller.maskRect; 
     let point1 = CGPointMake(CGRectGetMinX(rect), CGRectGetMaxY(rect)); 
     let point2 = CGPointMake(CGRectGetMaxX(rect), CGRectGetMaxY(rect)); 
     let point3 = CGPointMake(CGRectGetMidX(rect), CGRectGetMinY(rect)); 

     let triangle = UIBezierPath() 
     triangle.moveToPoint(point1) 
     triangle.addLineToPoint(point2) 
     triangle.addLineToPoint(point3) 
     triangle.closePath() 
     print("yay") 
     return triangle 
    } 
} 

extension GameViewController: RSKImageCropViewControllerDelegate { 
    func imageCropViewControllerDidCancelCrop(controller: RSKImageCropViewController) { 
     self.navigationController?.popViewControllerAnimated(true) 
    } 

    func imageCropViewController(controller: RSKImageCropViewController, didCropImage croppedImage: UIImage, usingCropRect cropRect: CGRect, rotationAngle: CGFloat) { 
     NSNotificationCenter.defaultCenter().postNotificationName("choseImage", object: croppedImage) 
     self.navigationController?.popViewControllerAnimated(true) 
    } 
} 

Answer 1

我相信你需要設置控制器cropMode到Custom像imageCropViewControllerCustomMaskPath方法被稱爲，所以請嘗試更改您的實例化類似於：

let controller: RSKImageCropViewController = RSKImageCropViewController(image: someImage!, cropMode: RSKImageCropMode.Custom)