I'd like to combine two UIImages, one stretchable and one "normal" one. The problem is that if I merge the Images using the UIGraphicsImageContext, the scond image is also stretched (it is on top of the first one as it should be, but stretched). Does anybody know how to avoid this?
Thanks a lot!
calls from my ViewController:
UIImage *stretchImage = [[UIImage imageNamed:#"stretchableLeft.png"] stretchableImageWithLeftCapWidth:0.0 topCapHeight:16.0];
stretchImage = [self imageWithImage:stretchImage scaledToSize:CGSizeMake(64.0, 64.0)];
stretchImage = [self mergeImageWithImage:stretchImage secondImage:[UIImage imageNamed:#"topImage.png"]]; // only 40x40 Px
the two methods are:
- (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize
{
UIGraphicsBeginImageContext( newSize );
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
- (UIImage*)mergeImageWithImage:(UIImage *)image secondImage:(UIImage *)image2
{
UIGraphicsBeginImageContext(image.size);
[image drawInRect:CGRectMake(0,0,image.size.width,image.size.height)];
[image2 drawInRect:CGRectMake(10,10,image.size.width,image.size.height) blendMode:kCGBlendModeNormal alpha:1.0];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
I think the issue is that you're asking both images to draw in the full rectangle. That is causing your second image to stretch.
Try using the image2.size for image2 when merging the images. You'll have to adjust the placement using the x/y coordinate when drawing the rectangle.
- (UIImage*)mergeImageWithImage:(UIImage *)image secondImage:(UIImage *)image2
{
UIGraphicsBeginImageContext(image.size);
[image drawInRect:CGRectMake(0,0,image.size.width,image.size.height)];
[image2 drawInRect:CGRectMake(10,10,image2.size.width,image2.size.height) blendMode:kCGBlendModeNormal alpha:1.0];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
Related
I have a view in which i am drawing the signature i want that the signature part of the view should be converted as UIImage and then display it in UIImageView here is the code which i got from net i am using for converting
UIGraphicsBeginImageContext(signatureView.bounds.size);
[signatureView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
logoImageView.image=img;
UIGraphicsEndImageContext();
Try this hope will help you.
- (UIImage *) getUIImageWithmyView:(UImyView *)myView
{
UIGraphicsBeginImageContextWithOptions(myView.bounds.size, myView.opaque, 0.0);
[myView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage * myImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return myImage;
}
use my bellow method...
- (UIImage *)captureView {
//hide controls if needed
CGRect rect = [signetureView bounds];//use your signature view's Rect means Frame;
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[self.view.layer renderInContext:context];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return img;
}
you can call this above method like bellow...
UIImage *tempImageSave=[self captureView];
try this:
UIGraphicsBeginImageContext(signatureView.bounds.size);
[signatureView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
logoImageView.image=img;
first endimagecontext and after that set/use that image in imageview
I'm trying to merge two images in one, and save that image onto the camera roll. But it just show a blank image. Can anyone help?
My code:
-(void)SaveFinalImage{
UIGraphicsBeginImageContext(self.view.bounds.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *savedImg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(savedImg, nil, nil, nil);
}
I have used this in my app.
UIImage *bottomImage = [UIImage imageNamed:#"bottom.png"]; //background image
UIImage *image = [UIImage imageNamed:#"top.png"]; //foreground image
CGSize newSize = CGSizeMake(width, height);
UIGraphicsBeginImageContext( newSize );
// Use existing opacity as is
[bottomImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
// Apply supplied opacity if applicable
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height) blendMode:kCGBlendModeNormal alpha:0.8];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
for more see my related answer on the same subject. iOS - Merging two images of different size
I am a Fresher Developer in iPhone .
I want Merge Two Images and Get Only One Image In UIImageView without set alpha.
This is my code. This code is working using alpha,
but I want set without set alpha.
MYCODE:-
-(UIImage *)maskingImage:(UIImage *)image
{
CGSize sizeR = CGSizeMake(200, 220);
// UIImage *textureImage = [UIImage imageNamed:#"tt.png"];
UIImage *textureImage =imgView2.image;
UIGraphicsBeginImageContextWithOptions(sizeR, YES, textureImage.scale);
[textureImage drawInRect:CGRectMake(0.0, 0.0, 200, 220)];
UIImage *bottomImage = UIGraphicsGetImageFromCurrentImageContext();
UIImage *upperImage = image;
CGSize newSize = sizeR ;
UIGraphicsBeginImageContext(newSize);
[bottomImage drawInRect:CGRectMake(0.0, 0.0, 200, 220)];
[upperImage drawInRect:CGRectMake(0.0, 0.0, 200, 220) blendMode:kCGBlendModeNormal alpha:0.5];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
Thanks in advance.
UIGraphicsBeginImageContext(YOUR SIZE);
//FIRST IMAGE
[FIRST_IMAGE drawInRect:CGRectMake(0, 0, YOUR_SIZE_WIDTH/2, YOUR_SIZE_HEIGHT)];
//SECOND IMAGE
[SECOND_IMAGE drawInRect:CGRectMake(YOUR_SIZE_WIDTH/2, 0, YOUR_SIZE_WIDTH/2, YOUR_SIZE_HEIGHT)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
use this function
- (UIImage * ) mergeImage: (UIImage *) imageA
withImage: (UIImage *) imageB
strength: (float) strength X:(float )x Y:(float)y{
UIGraphicsBeginImageContextWithOptions(CGSizeMake([imageA size].width,[imageA size].height), NO, 0.0);
[imageA drawAtPoint: CGPointMake(0,0)];
[imageB drawAtPoint: CGPointMake(x,y)
blendMode: kCGBlendModeNormal // you can play with this
alpha: strength]; // 0 - 1
UIImage *mergedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return mergedImage;}
here x and y is the placemnt where you want to show second image
i just faced the same problem , now i got the solution for my problem
CGSize newSize = CGSizeMake(320, 377);
UIGraphicsBeginImageContext( newSize );
// Use existing opacity as is
[ image1 drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
// Apply supplied opacity
[image2 drawInRect:CGRectMake(0,0,newSize.width,newSize.height) blendMode:kCGBlendModeNormal alpha:0.8];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
Try this ,its work like a charm for me , i hope you will also get the solution.
you can use like --
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height) blendMode:kCGBlendModeNormal alpha:0.0];
I want to get the following result with two images.
Please help me.
To combine two images on an image view try this
UIImage *bottomImage = [UIImage imageNamed:#"bottom.png"]; //background image
UIImage *image = [UIImage imageNamed:#"top.png"]; //foreground image
CGSize newSize = CGSizeMake(width, height);
UIGraphicsBeginImageContext( newSize );
// Use existing opacity as is
[bottomImage drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
// Apply supplied opacity if applicable
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height) blendMode:kCGBlendModeNormal alpha:0.8];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
Add newImage to UIImageView
After #Sumanth's code for combine two images you need to mask final image like how-to-mask-an-image link
I want to crop a UIImage that the size of the UIImage is 640*960 and i want to crop it and it will be 640*640.
I try to use this method:
CGImageRef imageRef = CGImageCreateWithImageInRect([largeImage CGImage], cropRect);
// or use the UIImage wherever you like
[UIImageView setImage:[UIImage imageWithCGImage:imageRef]];
CGImageRelease(imageRef);]]
and this CGRect : (0,0,640,640)
but it give me UIImage that is not 640*640 from the original UIImage
use the following function
UIImage *newImage = [self imageWithImage:mainDelegate.starImage scaledToSize:CGSizeMake(640, 640)];
- (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize {
UIGraphicsBeginImageContext(newSize);
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
This will return the image with size (newSize.width,newSize.height)