如何保存两张图片，允许其中一张图片旋转，缩放并移动

Question

按照我的标题，我有一张2张图片，我将其保存为一张图片。

其中一张照片允许用户进行旋转，缩放和移动等姿势。

我该如何保存用户移动和旋转的图片？

screen shot of the phone         saved image 

下面的代码是从称为How to combine/ merge 2 images into 1

UIImage *image = nil; 

     CGSize newImageSize = CGSizeMake(cropImage.frame.size.width, cropImage.frame.size.height); 
     if (UIGraphicsBeginImageContextWithOptions != NULL) { 
      UIGraphicsBeginImageContextWithOptions(newImageSize, NO, [[UIScreen mainScreen] scale]); 
     } else { 
      UIGraphicsBeginImageContext(newImageSize); 
     } 

    // Draw image1 
    [maskImage.image drawInRect:CGRectMake(0,0, maskImage.frame.size.width,maskImage.frame.size.height)]; 
    // Draw image2 
    [cropImage.image drawInRect:CGRectMake(cropImage.frame.origin.x, cropImage.frame.origin.y, cropImage.frame.size.width, cropImage.frame.size.height)]; 

    image = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 

    return image; 

Answer 1

尝试这段代码

//Hide your views here like save button 
    CGRect screenRect = [[UIScreen mainScreen] bounds]; 
    UIGraphicsBeginImageContext(screenRect.size); 
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; 
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    UIImageWriteToSavedPhotosAlbum(viewImage, self, nil, nil); 
//Show again your hidden views here like save button