如何在iphone应用程序开发中添加两个uiimageview并将其保存到iphone照片库？ [英] How can i add two uiimageview and save it to iphone photo gallery in iphone application development?

问题描述

我直截了当地说，我的问题是，我有一个uiview控制器，它带有3个按钮和一个uiimage视图。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默认照片库中拍摄图像并放置在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按钮它将从照片库中拍摄另一张图像并放置在上一张图像上。

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

现在，当我按第三个按钮时，这两个图像将添加并使其成为一个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.

我已完成第1步和第2步但我该如何处理第3步？ ？

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

编辑

假设图片中没有胡子的男人（图片1）但我正在添加另一个胡须图像（image2）来制作一个他看起来像胡子男人的图像（image3）。我想在相册中保存图像3。

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.

在此先感谢您的帮助..

Thanks In Advance for any help..

推荐答案

我自己也遇到了同样的问题我以前用这种方式解决了

myself also having same issue previously i solved this way

尝试这个类别代码....

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

我的设计将是视图（命名为combinedView），其中包含两个图像视图，一个只是源图像[即没有胡子的男人]在该图像的顶部我有胡须图像...

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...

然后我通过这种方式制作图像....

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

UIImage *myMaskedImage=[UIImage imageFromView:combinedView ];

将此保存到相册使用此...

for saving this to album use this...

 UIImageWriteToSavedPhotosAlbum(myMaskedImage, self, nil, nil);

尝试这个想法....

try this idea....

新更新：
您需要维护此结构，并且 theView 的背景颜色为清晰颜色

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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