Combine multiple images into one image on iPhone

Question

I want to combine several images of different sizes and at different points.
I want to combine them all and save in one copy (image).

so how can i transfer images to one image?

Answer 1

I found a solution that is so simple

you can combine multiple images by creating the 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 as follows

 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 combine two UIImageViews into one. The same goes for multiple images. You must combine several images according to your size.