问题描述

我直奔主题，我的问题是，我有一个带有 3 个按钮和一个 uiimage 视图的 uiview 控制器.现在，

I am going straight to the point,my problem is, I have a uiview controller which is taking 3 buttons and a uiimage view.Now,

1. 当我按下第一个按钮时，我正在从 iphone 默认照片库中获取图像并放置在 uiimageview 上.

1. When i am pressing first button i am taking image from iphone default photo gallery and placing on uiimageview.

当我按下第二个按钮时，它将从照片库中获取另一张图片并放置在上一张图片上.

When i am pressing second button it will take another image from photo gallery and placing on previous image.

现在当我按下第三个按钮时，这两个图像将添加并使其成为一张图像并保存在相册中.

Now when i will press third button those two image will add and make it one image and save in the photo album.

我已经完成了第 1 步和第 2 步，但我该怎么做第 3 步??

i have done step 1 and step 2 but how can i do step 3??

编辑

假设图片中有一个没有胡须的人 (image1)，但我要添加另一个胡须图片 (image2) 来制作一个看起来像胡须男人的图片 (image3).我想将图片 3 保存在相册中.

suppose a man without beard in a picture(image1) but i am adding another beard image(image2) to make an image where he will look like beard man(image3). i want to save image 3 in photo album.

提前感谢您的帮助..

推荐答案

我自己也有同样的问题，以前我是这样解决的

myself also having same issue previously i solved this way

试试这个类别代码....

try this category code....

.h 文件:

#import <UIKit/UIKit.h>

@interface UIImage (MyImage)


+ (UIImage*)imageFromView:(UIView*)view;
+ (UIImage*)imageFromView:(UIView*)view scaledToSize:(CGSize)newSize;
+ (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize;
+ (void)beginImageContextWithSize:(CGSize)size;
+ (UIImage *)croppedImage:(UIImage *)myImage :(CGRect)bounds;

//masking the image ....

+ (UIImage*) maskImage:(UIImage *)image withMask:(UIImage *)maskImage;

@end

.m 文件:

#import "UIImage+MyImage.h"

@implementation UIImage (MyImage)

+ (void)beginImageContextWithSize:(CGSize)size
{
    if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
        if ([[UIScreen mainScreen] scale] == 2.0) {
            UIGraphicsBeginImageContextWithOptions(size, YES, 2.0);
        } else {
            UIGraphicsBeginImageContext(size);
        }
    } else {
        UIGraphicsBeginImageContext(size);
    }
}

+ (void)endImageContext
{
    UIGraphicsEndImageContext();
}

+ (UIImage*)imageFromView:(UIView*)view
{
    [self beginImageContextWithSize:[view bounds].size];
    BOOL hidden = [view isHidden];
    [view setHidden:NO];
    [[view layer] renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    [self endImageContext];
    [view setHidden:hidden];
    return image;
}

+ (UIImage*)imageFromView:(UIView*)view scaledToSize:(CGSize)newSize
{
    UIImage *image = [self imageFromView:view];
    if ([view bounds].size.width != newSize.width ||
        [view bounds].size.height != newSize.height) {
        image = [self imageWithImage:image scaledToSize:newSize];
    }
    return image;
}

+ (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize
{
    [self beginImageContextWithSize:newSize];
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    [self endImageContext];
    return newImage;
}


+ (UIImage *)croppedImage:(UIImage *)myImage :(CGRect)bounds {
    CGImageRef imageRef = CGImageCreateWithImageInRect(myImage.CGImage, bounds);
    UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
    CGImageRelease(imageRef);
    CGSize asd =  croppedImage.size;
    return croppedImage;
}




+ (UIImage*) maskImage:(UIImage *)image withMask:(UIImage *)maskImage {

    CGImageRef maskRef = maskImage.CGImage; 

    CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef),
                                        CGImageGetHeight(maskRef),
                                        CGImageGetBitsPerComponent(maskRef),
                                        CGImageGetBitsPerPixel(maskRef),
                                        CGImageGetBytesPerRow(maskRef),
                                        CGImageGetDataProvider(maskRef), NULL, false);

    CGImageRef masked = CGImageCreateWithMask([image CGImage], mask);

    CGImageRelease(mask);
    CGImageRelease(maskRef);
    return [UIImage imageWithCGImage:masked];

}



@end

我的设计将是包含两个图像视图的视图(命名为组合视图)，其中一个只是源图像[即没有胡须的人]在该图像顶部我有胡须图像...

my design will be view(named as combinedView) that contains two image view one is just the source image[i.e man without beard] on the top of that image i am having beard image...

然后我用这种方式制作图像......

then i make the image by this way....

UIImage *myMaskedImage=[UIImage imageFromView:combinedView ];

要保存到相册使用这个...

for saving this to album use this...

 UIImageWriteToSavedPhotosAlbum(myMaskedImage, self, nil, nil);

试试这个想法....

新更新:这个结构你需要维护，并且 theView 的背景颜色也是清晰的颜色

New Update: this structure you need to maintain and also theView's background color as clear color

              +theView ---
                 |
                 ->imageview1(person)
                 |
                 ->imageView2(beard alone)

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