在iPhone中将多个图像合并为一个图像

我想合并多个不同大小和不同点的图像。
我想合并它们并保存在一个副本（图像）。

那么我怎样才能将图像合成为一个图像呢？

Answer 1

我find了这么简单的解决scheme

您可以通过创build以下方法合并多个图像

- (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; } } 

现在按照以下方式调用这个方法

 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

你可以使用CIImage这个，

 -(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

你可以使用这个代码：

  - (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; } 

这是2个图像合并成一个UIImageViews。 这同样适用于多个图像。 您必须根据您的尺寸合并多个图像。