Question

可能重复：Saving two Overlapping UIImage

在UIScrollView中，我添加了我的UIImageView，它上面有一个 frame Layer 。我想在所有编辑后将最终图像保存在屏幕上。对上述问题给出的答案是有效的，但是当它绘制框架时，会导致<强烈的图像质量下降，所以我正在寻找一种能让我的图像保持良好分辨率的解决方案。请提前帮助我，谢谢！

Answer 1

尝试使用此代码：

  //merge two images for this code

 UIImage *bottomImage =imgview.image; //background image ////1st image
 UIImage *image       = imgProfile.image; //foreground image///2nd image

 CGSize newSize = CGSizeMake(270, 330); // set your image rect
 UIGraphicsBeginImageContext( newSize );

 // Use existing opacity as is
 [bottomImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];///1st image set frame

 // Apply supplied opacity if applicable

 [image drawInRect:CGRectMake(81,218,97,78) blendMode:kCGBlendModeNormal alpha:1]; //2nd image set frame on bottom image with alpha value

 UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();

 UIGraphicsEndImageContext();
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
 NSString *documentsDirectory = [paths objectAtIndex:0];
 NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];
 NSData *imageData = UIImagePNGRepresentation(newImage);
 [imageData writeToFile:savedImagePath atomically:NO];

您可以在应用程序的文档目录中看到新创建的图像。

将两个重叠的图像保存在一个iOS中

1 个答案: