如何清除屏幕截图IOS

我正在研究 IOS应用程序,其中需要采取清晰的屏幕截图我已经尝试过了

func captureView() -> UIImage {
        //hide controls if needed
        let rect: CGRect = self.imageView.frame
        UIGraphicsBeginImageContext(rect.size)
        let context: CGContextRef = UIGraphicsGetCurrentContext()!
        self.view.layer.renderInContext(context)
        let img: UIImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return img
    }

但是图像的质量并不好.请为我推荐一些东西.

解决方法

换线

UIGraphicsBeginImageContext(rect.size)

至

UIGraphicsBeginImageContextWithOptions(rect.size,false,0.0);