ios - IOS 如何截屏

Question

我正在开发需要清晰屏幕截图的 IOS 应用程序，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
    }

但是图像质量不好。请给我一些建议。

Answer 1

换行

UIGraphicsBeginImageContext(rect.size)

到

UIGraphicsBeginImageContextWithOptions(rect.size, false, 0.0);