How can I store a UIImage in an NSDictionary?
How can I store a UIImage in an NSDictionary? ...
uiimage
How do I implement the protocols for the Three20 framework?
I've been trying to implement the Three20 framework in my iPhone SDK app. I'm a bit confused as to implementing the proper methods. Is there any guide as to what to implement in order to make the TTPhotoViewController work? I know how to implement protocols, but the code is very difficult to read. Anyone know any guides with this speci...
Stop Images Disappearing when scrolling UITableView
I have a UI Table View Controller. Each Cell Loads an image from my webserver. If I scroll the TableView so that a particular cell scrolls out of view and then scroll back again the image for that cell has vanished and I have to wait for it to reload. I'm guessing this is some performance/ memory management thing build into iphone? How...
iPhone, modify UIImage to a target average color
Hi, I need for a project to modify UIImage. Here are steps I have to follow - I extract the average color of the image by taking several points in the image and calculating the average R, G and B - The next step is to modify the image in order to have a new average R, G and B for the modified image. This new R, G and B is given, the thi...
How Do I Take a Screen Shot of a UIView?
I am wondering how my iPhone app can take a screen shot of a specific UIView as a UIImage. I tried this code but all I get is a blank image. UIGraphicsBeginImageContext(CGSizeMake(320,480)); CGContextRef context = UIGraphicsGetCurrentContext(); [myUIView.layer drawInContext:context]; UIImage *screenShot = UIGraphicsGetImageFromCurrentI...
UIImage: strange issue with size
Hey, Im trying to download "profile_image_url" images (.jpg) from twitter and display them in my app. Im trying to resize any images that are not what I'm expecting them to be. In the process of debugging an issue, I ran into this strange behavior. Code: NSLog(@"%d %d %d %d",48,image.size.width,image.size.height,48); Prints: 2...
select part of image (clipping)
This is probably not as hard as I think it is, but how can I select part of an image? Consider the following example: The grey area is an image in the PNG or JPG Format, now I want to select the red 80x80 px area from it. The red area should be displayed, the rest not. I have tried numerous approaches: Make ckipsToBounds of UIImageV...
How Does IB Load a UIImage: imagedNamed vs imageWithData?
After reading the memory management for UIImage, I'm worried about how interface builder loads an UIImage. Does it use UIImage:imagedNamed or UIImage:imageWithData? ...
UIImage created from CGImageRef fails with UIImagePNGRepresentation
I'm using the following code to crop and create a new UIImage out of a bigger one. I've isolated the issue to be with the function CGImageCreateWithImageInRect() which seem to not set some CGImage property the way I want. :-) The problem is that a call to function UIImagePNGRepresentation() fails returning a nil. CGImageRef origRef = [s...
NSData to UIImage
I'm trying to save a UIIMage and then retrieve it and display it. I've been successful by saving an image in the bundle, retrieving it from there and displaying. My problem comes from when I try to save an image to disk (converting it to NSData), then retrieving it. I convert the image to NSData like so... NSData* topImageData = UIImag...
Add Text to the Image
HI Im currently developing an application where i have to add the text over the image at any position in the image(not subview) and the output should be the single image file with the original image and the text embedded in it,any help will be appreciable. eg : water mark on the image Thanks sivasankar ...
modify pixels of an CGImageRef
Hi, I am using the following code to modify pixels of an image. The issue I have is the color of the images are icorrect. Do you have any idea of the issue? CGImageRef inImage = img.CGImage; CGContextRef ctx; CFDataRef m_DataRef; m_DataRef = CGDataProviderCopyData(CGImageGetDataProvider(inImage)); UInt8 * m_Pix...
difference between CGContextDrawImage et UIImage drawInRect
Hello, I was wondering which method is the best when there is a need to scale images? Do you have benchmarks on this? Thanks in advance. Regards, ...
UIImage Saving image with file name on the iPhone
How can I save an image (like using UIImageWriteToSavedPhotosAlbum() method) with a filename of my choice to the private/var folder? ...
A big, green UIImage anyone?
According to this post, there is a stretchable UIButton image that is red. Does anyone have a green one? (My Photoshop skills are very poor.) ...
How do I add an outer glow to a UIImage or UIImageView or UIView
I want to add a FADED shadow/outer glow to a UIImage/UIImageView/UIView but I know no Core Graphics at all. Edit: Please Help!! ...
UIImage setting value from filename in database
Hi All I have a SQLite database containing several items of data and in there i have included a column with the file names of the images i want to use in my app. I know how to pull this data out but i dont know the correct syntax to use to set that filename to the uiimage. Here is an example of what i thought it would look like. UIIma...
scale image of size 1600*1200
hi, I am developing image size based iphone application. selecting two photos of size 1600*1200 from photo library and merging of both to single image and save to same library. Again if i check the image size it shows 600* 800. How to get original size(1600*1200) of created New photo(600*800). Thanks in advance. ...
Assigning random image with arc4random?
Ok, I'm going to try to make this more clear because my last question was extremely confusing. I've included a picture this time. Each one of these circles is a UIImageView and they are each assigned a random image which is one of 7 colors. So each circle could be one of 7 colors. I want to make it so that the user has to hit the cir...
Image Context produces artifacts when compositing UIImages.
I'm trying to overlay a custom semi-transparent image over a base image. The overlay image is stretchable and created like this: [[UIImage imageNamed:@"overlay.png"] stretchableImageWithLeftCapWidth:5.0 topCapHeight:5.0] Then I pass that off to a method that overlays it onto the background image for a button: - (void)overlayImage:(U...