Iphone 如何将UIImage和UILabel组合成一个图像并保存

我有2个UILabel和2个图像，需要合并到一个UIImage中保存

我知道我可以用屏幕截图来做，但是我的主图像是圆形的，所以如果我把它弄直，它仍然会显示出锐利的边缘

我可以这样做来组合图像：

//CGSize newImageSize = CGSizeMake(cropImage.frame.size.width, cropImage.frame.size.height);
CGSize newImageSize = CGSizeMake(480, 320);
NSLog(@"CGSize %@",NSStringFromCGSize(newImageSize));

UIGraphicsBeginImageContextWithOptions(newImageSize, NO, 0.0); //retina res
[self.viewForImg.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

NSData *imgData =  UIImageJPEGRepresentation(image, 0.9); //UIImagePNGRepresentation ( image ); // get JPEG representation
UIImage * imagePNG = [UIImage imageWithData:imgData]; // wrap UIImage around PNG representation

UIGraphicsEndImageContext();
return imagePNG;

但不确定如何添加UILabel

---

非常感谢您的回复。

使用

[myLabel.layer renderInContext:UIGraphicsGetCurrentContext（）]以在当前上下文中绘制

例如：-

    UIGraphicsBeginImageContextWithOptions(newImageSize, NO, 0.0); //retina res
    [self.viewForImg.layer renderInContext:UIGraphicsGetCurrentContext()];
    [myLabel.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

根据你的评论，如果你想在一个特定的框架中画这个，请按如下方式做：

[myLabel drawTextInRect:CGRectMake(0.0f, 0.0f, 100.0f, 50.0f)];

如果你想给背景上色，试试这个

CGRect drawRect = CGRectMake(rect.origin.x, rect.origin.y,rect.size.width, rect.size.height); 
CGContextSetRGBFillColor(context, 100.0f/255.0f, 100.0f/255.0f, 100.0f/255.0f, 1.0f); 
CGContextFillRect(context, drawRect);

或者你可以检查这个问题

试试这个
 谢谢ACB的回复，但是这些并不能回答我的问题。我使用了[myLabel drawTextInRect:CGRectMake（14,35,220,40）]@德斯蒙德，是的，这也是一个选择。我还想加上这个，然后决定不加，因为这应该足以画出标签。如果问题是从一个特定的rect中提取，这是正确的，但在问题中看不到。不用担心，我认为我的问题不够清楚。谢谢：）顺便问一下，您知道如何从CurrentImageContext更改UIGraphicsGetImageFromCurrentImageContext的背景色吗？当我保存图像时，背景是白色的；CGContextSetRGBFillColor（上下文，100.0f/255.0f，100.0f/255.0f，100.0f/255.0f，1.0f）；CGContextFillRect（上下文，drawRect）或检查此项，
 UIGraphicsBeginImageContextWithOptions(newImageSize, NO, scale); //retina res
        [COGI.layer renderInContext:UIGraphicsGetCurrentContext()];
        [COGI.image drawInRect:CGRectMake(0, 0, 248, 290)];
        [iconI.image drawInRect:CGRectMake(4, 20, 240, 240)];
        [stampI.image drawInRect:CGRectMake(0, -5, 248, 290)];
        [headerL drawTextInRect:CGRectMake(14, 35, 220, 40)];
        [detailL drawTextInRect:CGRectMake(16, 200, 215, 65)];

        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
        [[UIColor redColor] set]; 
        NSData *imgData =  UIImageJPEGRepresentation(image, 1.0); //UIImagePNGRepresentation ( image ); // get JPEG representation
        UIImage * imagePNG = [UIImage imageWithData:imgData]; // wrap UIImage around PNG representation

        UIGraphicsEndImageContext();
        return imagePNG;

UIEdgeInsets insets = UIEdgeInsetsMake(1, 1, 1, 1);
CGSize imageSizeWithBorder = CGSizeMake(view.frame.size.width + insets.left + insets.right, view.frame.size.height + insets.top + insets.bottom);
UIGraphicsBeginImageContextWithOptions(imageSizeWithBorder, UIEdgeInsetsEqualToEdgeInsets(insets, UIEdgeInsetsZero), 0);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextClipToRect(context, (CGRect){{insets.left, insets.top}, view.frame.size});
CGContextTranslateCTM(context, -view.frame.origin.x + insets.left, -view.frame.origin.y + insets.top);
[view.layer renderInContext:context];
UIImage *viewCopy = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();