Merge multiple images into one image in iPhone [closed] - ios

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I want to merge multiple images which are of different size & at different points.
I want to merge them all and save it in one copy(image).
so how can i mearge images into one image?

Answer 1

I found the solution which is so simple
you can merge multiple images by creating following method
- (BOOL) mergedImageOnMainImage:(UIImage *)mainImg WithImageArray:(NSArray *)imgArray AndImagePointArray:(NSArray *)imgPointArray
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
UIGraphicsBeginImageContext(mainImg.size);
[mainImg drawInRect:CGRectMake(0, 0, mainImg.size.width, mainImg.size.height)];
int i = 0;
for (UIImage *img in imgArray) {
[img drawInRect:CGRectMake([[imgPointArray objectAtIndex:i] floatValue],
[[imgPointArray objectAtIndex:i+1] floatValue],
img.size.width,
img.size.height)];
i+=2;
}
CGImageRef NewMergeImg = CGImageCreateWithImageInRect(UIGraphicsGetImageFromCurrentImageContext().CGImage,
CGRectMake(0, 0, mainImg.size.width, mainImg.size.height));
UIGraphicsEndImageContext();
[pool release];
if (NewMergeImg == nil) {
return NO;
}
else {
UIImageWriteToSavedPhotosAlbum([UIImage imageWithCGImage:NewMergeImg], self, nil, nil);
return YES;
}
}
now call this method in follwing way
NSArray *imgArray = [[NSArray alloc] initWithObjects:
[UIImage imageNamed:#"image06.png"],
[UIImage imageNamed:#"image07.png"],
[UIImage imageNamed:#"image08.png"],
[UIImage imageNamed:#"image09.png"],
[UIImage imageNamed:#"BackBtn.png"],
[UIImage imageNamed:#"Facebook.png"], nil];
NSArray *imgPointArray = [[NSArray alloc] initWithObjects:
#"10", #"10",
#"10", #"25",
#"30", #"15",
#"30", #"50",
#"20", #"80",
#"25", #"100", nil];
BOOL suc = [self mergedImageOnMainImage:[UIImage imageNamed:#"img001.png"] WithImageArray:imgArray AndImagePointArray:imgPointArray];
if (suc == YES) {
NSLog(#"Images Successfully Mearged & Saved to Album");
}
else {
NSLog(#"Images not Mearged & not Saved to Album");
}

Answer 2

You can use CIImage for this,
-(UIImage *)mergeTwoImage:(UIImage*)image1 andImage2:(UIImage *)image2
{
CIImage *topImage = [[CIImage alloc]initWithImage:image1];
CIImage *backgroundImage = [[CIImage alloc]initWithImage:image2];
CIFilter *darkenFilter = [CIFilter filterWithName:#"CIDarkenBlendMode" keysAndValues:kCIInputImageKey,topImage,
#"inputBackgroundImage",backgroundImage,nil];
CIImage *resultOfFilter = darkenFilter.outputImage;
CIContext *ctx = [CIContext contextWithOptions:nil];
CGImageRef imageToReturn = [ctx createCGImage:resultOfFilter fromRect:resultOfFilter.extent];
UIImage *outputImage = [UIImage imageWithCGImage:imageToReturn];
CGImageRelease(imageToReturn);
imageToReturn = nil;
return outputImage;
}

Answer 3

You can use this code : -
- (IBAction) mergeImage:(id)sender
{
UIImage *framedImage = firstImageView.image;
CGSize size = CGSizeMake(firstImageView.frame.size.width, firstImageView.frame.size.height);
UIGraphicsBeginImageContextWithOptions(size, self.view.alpha, 0.0);
UIImage *imageToPlace = secondImageView.image;
[framedImage drawInRect:CGRectMake(0, 0, firstImageView.frame.size.width, firstImageView.frame.size.height)];
[imageToPlace drawInRect:CGRectMake(18, 25, 242, 243)];
UIImage *imageC = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageView *newImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, framedImage.size.width,framedImage.size.height)];
newImageView.image = imageC;
newImageView.contentMode = UIViewContentModeScaleAspectFill;
}
This is for 2 images they merge two UIImageViews into one. Same this for multiple images. You have to merge multiple images according to your size.