Question

我有一个视图，其中我正在绘制签名，我希望视图的签名部分应转换为UIImage，然后将其显示在UIImageView这里是我从中得到的代码net我用于转换

    UIGraphicsBeginImageContext(signatureView.bounds.size);
   [signatureView.layer renderInContext:UIGraphicsGetCurrentContext()];
   UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
   logoImageView.image=img;
   UIGraphicsEndImageContext();

Answer 1

试试这个希望会对你有帮助。

 - (UIImage *) getUIImageWithmyView:(UImyView *)myView
    {
        UIGraphicsBeginImageContextWithOptions(myView.bounds.size, myView.opaque, 0.0);
        [myView.layer renderInContext:UIGraphicsGetCurrentContext()];

        UIImage * myImage = UIGraphicsGetImageFromCurrentImageContext();

        UIGraphicsEndImageContext();

        return myImage;
    }

Answer 2

使用我的波纹管方法......

- (UIImage *)captureView {

     //hide controls if needed
    CGRect rect = [signetureView bounds];//use your signature view's Rect means Frame;

    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    [self.view.layer renderInContext:context];   
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return img;

}

您可以将此上述方法称为下方...

UIImage *tempImageSave=[self captureView];

Answer 3

试试这个：

  UIGraphicsBeginImageContext(signatureView.bounds.size);
  [signatureView.layer renderInContext:UIGraphicsGetCurrentContext()];
  UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  logoImageView.image=img;

首先是endimagecontext，然后在imageview中设置/使用该图像

如何将UIView的一部分转换为UIImage并在imageView中显示它

3 个答案: