I am wanting to press a button and alternate between two images with one UIImageView.
Right now when I run it, I press the button, the image changes but will not change back. What do I need to change in this action code to make it alternate?
- (IBAction)Change:(id)sender {
image.image = [UIImage imageNamed:#"car.png"];
}
Try following code :
- (IBAction)Change:(id)sender {
if ([sender isSelected])
{
imageView.image = [UIImage imageNamed:#"car.png"];
[sender setSelected:NO];
}
else
{
imageView.image = [UIImage imageNamed:#"bike.png"];
[sender setSelected:YES];
}
}
To Display sequence image on button click.
.h file :
int counter;
.m file :
in viewDidLoad initialize counter = 0
Then
- (IBAction)Change:(id)sender {
counter++;
imgView.image = [UIImage imageNamed:[NSString stringWithFormat:#"%d.png",counter]];
}
And give your image name like 1.png, 2.png, 3.png and so on...
You have to maintain a flag.
In Somewhere before tapping the button, assign the flag
BOOL isFirstImageShown=YES;
Then on your button action
- (IBAction)Change:(id)sender {
if(isFirstImageShown)
{
isFirstImageShown=NO;
yourImageView.image = [UIImage imageNamed:#"yourSecondImage.png"];
}
else
{
isFirstImageShown=YES;
yourImageView.image = [UIImage imageNamed:#"yourFirstImage.png"];
}
}
You want that on button click you need another image you have to first set the image when you load the view and then on button click.
I want to change the image in image view on button click but it does not changing. I am using JPG image to load in image View
- (IBAction) changeImage:(id)sender
{
UIButton *tappedButton = (UIButton*) sender;
NSInteger selectedIndex = [tappedButton tag];
if (selectedIndex==0)
{
UIImage *modelimage = [UIImage imageNamed:#"compositone.jpg"];
modelImagewView.image=modelimage;
}
else
{
UIImage *modelimage = [UIImage imageNamed:#"composittwo.jpg"];
modelImagewView.image=modelimage;
}
}
Try this format - modelImagewView.image = [UIImage imageNamed:#"composittwo.jpg"];
Also, make sure you have set tag numbers properly so that selectedIndex is not always 0. At the same time check if you have linked this IBAction to the appropriate button.
Try This Code
- (IBAction) changeImage:(id)sender
{
UIButton *tappedButton = (UIButton*) sender;
if (tappedButton.tag==0)
{
modelImageView.image=[UIImage imageNamed:#"compositone.jpg"];
}
else
{
modelImageView.image=[UIImage imageNamed:#"composittwo.jpg"];
}
}
I am having trouble with my UITableView in the NavigationController.
When I add data to the table I use another class to download images to display in that table, while all that works great but if in the middle of images being download I swtich back to the previous view in the navigationcontroller app crashed.
Here is my code to explain further
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
// Set appIcon and clear temporary data/image
UIImage *image = [[UIImage alloc] initWithData:self.activeDownload];
UIImage *appIcon;
if (image.size.width != kAppIconHeight && image.size.height != kAppIconHeight)
{
CGSize itemSize = CGSizeMake(125, 85);
UIGraphicsBeginImageContext(itemSize);
CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height);
[image drawInRect:imageRect];
appIcon = UIGraphicsGetImageFromCurrentImageContext();
///UIGraphicsEndImageContext();
}
else
{
appIcon = image;
//self.appRecord.appIcon = image;
}
self.activeDownload = nil;
// Release the connection now that it's finished
self.imageConnection = nil;
// call our delegate and tell it that our icon is ready for display
if(delegate != nil)
[delegate appImageDidLoad:self.indexPathInTableView imaged:appIcon ];
[image release];
}
The appImageDidLoad is a method that exists in my UITableView view.
Is there a way I can check to see if the UITableView is valid in my imagedownload class so I know not to send the image.
Thanks in advance.
The crash is due to delegate getting release by the time the image was ready!
Try this in ViewWillDisappear
// terminate all pending download connections
NSArray *allDownloads = [self.imageDownloadsInProgress allValues];
[allDownloads performSelector:#selector(cancelDownload)];
This is the solution for this crash.
-(void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
// terminate all pending download connections
NSArray *allDownloads = [self.imageDownloadsInProgress1 allValues];
[allDownloads makeObjectsPerformSelector:#selector(cancelDownload)];
}
Is there any way to customize color of selected segment in UISegmentedControl?
I've found segmentedController.tintColor property, which lets me customize color of the whole segmented control.
The problem is, when I select bright color for tintColor property, selected segment becomes almost unrecognizable (its color is almost the same as the rest of segmented control, so its hard to distinguish selected and unselected segments). So I cannot use any good bright colors for segmented control.
The solution would be some separate property for selected segment color but I cannot find it. Did anyone solve this?
Here is the absolute simplest way to change the selected segment to any RGB color. No subclassing or hacks required.
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
UIColor *newTintColor = [UIColor colorWithRed: 251/255.0 green:175/255.0 blue:93/255.0 alpha:1.0];
segmentedControl.tintColor = newTintColor;
UIColor *newSelectedTintColor = [UIColor colorWithRed: 0/255.0 green:175/255.0 blue:0/255.0 alpha:1.0];
[[[segmentedControl subviews] objectAtIndex:0] setTintColor:newSelectedTintColor];
This example shows the important steps:
Sets the control style to
"StyleBar", which is required for it
to work
Sets the un-selected color for the
entire control first to orange
Sets the color of the selected
segment to green
Notes:
Steps 1 and 2 can be done in
interface builder, or in code as
shown. However step 3 can only be done
in code
The color values being set with
notation like this "123.0/255.0" is
just a way to make the RGB values
stand out instead the normalized
float values required by UIColor
(just ignore it if you like)
I found A Simple Way to Add Color for Selected Segment in UISegmentcontrol
sender is UISegmentControl
for (int i=0; i<[sender.subviews count]; i++)
{
if ([[sender.subviews objectAtIndex:i]isSelected] )
{
UIColor *tintcolor=[UIColor colorWithRed:127.0/255.0 green:161.0/255.0 blue:183.0/255.0 alpha:1.0];
[[sender.subviews objectAtIndex:i] setTintColor:tintcolor];
}
else
{
[[sender.subviews objectAtIndex:i] setTintColor:nil];
}
}
Check its Working For Me
To do this you simply have to find the selected segment, for example by iterating over the segmented control's subviews and testing the isSelected property, then simply call the setTintColor: method on that subview.
I did this by connecting an action to each segmented control on the ValueChanged event in Interface Builder, I connected them to this this method in the view controller file which is essentially msprague's answer:
- (IBAction)segmentedControlValueChanged:(UISegmentedControl*)sender
{
for (int i=0; i<[sender.subviews count]; i++)
{
if ([[sender.subviews objectAtIndex:i] respondsToSelector:#selector(isSelected)] && [[sender.subviews objectAtIndex:i]isSelected])
{
[[sender.subviews objectAtIndex:i] setTintColor:[UIColor whiteColor]];
}
if ([[sender.subviews objectAtIndex:i] respondsToSelector:#selector(isSelected)] && ![[sender.subviews objectAtIndex:i] isSelected])
{
[[sender.subviews objectAtIndex:i] setTintColor:[UIColor blackColor]];
}
}
}
To ensure that the control is displayed correctly each time the view is opened by the user I also had to override the -(void)viewDidAppear:animated method and call the method as follows:
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
//Ensure the segmented controls are properly highlighted
[self segmentedControlValueChanged:segmentedControlOne];
[self segmentedControlValueChanged:segmentedControlTwo];
}
For some bonus points if you do want to set the segmented control to use a white tint color on selection then you will also want to change the color of the text to black when it's selected, you can do this like so:
//Create a dictionary to hold the new text attributes
NSMutableDictionary * textAttributes = [[NSMutableDictionary alloc] init];
//Add an entry to set the text to black
[textAttributes setObject:[UIColor blackColor] forKey:UITextAttributeTextColor];
//Set the attributes on the desired control but only for the selected state
[segmentedControlOne setTitleTextAttributes:textAttributes forState:UIControlStateSelected];
With the introduction of iOS 6 setting the tint color of the selected item for the first time in the viewDidAppear method wont work, to get around this I used grand central dispatch to change the selected color after a fraction of a second like so:
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0.05 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
[self segmentedControlValueChanged:segmentedControlOne];
});
For some reason Apple dont allow you to change the color of standard UISegmentedControls.
There is however a "legal" way around it which is to change the segmented control style to UISegmentedControlStyleBar. This makes it look slightly different which you may not like but it does allow color.
NSArray *itemArray = [NSArray arrayWithObjects: #"One", #"Two", #"Three", nil];
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:itemArray];
//Change Bar Style and ad to view then release segmented controller
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
segmentedControl.tintColor = [UIColor colorWithRed:.9 green:.1 blue:.1 alpha:1];
[self.view addSubview:segmentedControl];
[segmentedControl release];
Hope this helped,
Seb Kade
"I'm here to help"
Edit: This solution doesn't work on iOS 6. See David Thompson's answer below.
This thread is really old, but none of the simple answers worked properly for me.
The accepted answer works as long as you revert the color of the deselected segmented controls.
Something like this will work in your value changed function:
for (int i=0; i<[control.subviews count]; i++)
{
if ([[control.subviews objectAtIndex:i]isSelected] )
{
UIColor *tintcolor=[UIColor colorWithRed:127.0/255.0 green:161.0/255.0 blue:183.0/255.0 alpha:1.0];
[[control.subviews objectAtIndex:i] setTintColor:tintcolor];
} else {
UIColor *tintcolor=[UIColor grayColor]; // default color
[[control.subviews objectAtIndex:i] setTintColor:tintcolor];
}
}
I know this is an old question But now in xcode 11 +, you can set selected segment Tint colour
In code us can use selectedSegmentTintColor. available iOS 13+
Here is my modified version of uihacker's CustomSegmentedControl (see credit in comment). The idea is I change the way to find the subview that should have the tintColor changed, from using selectedIndex to isSelected method. Because I was working with a custom UISegmentedControl that has 3 or more segments which the subview ordering changes randomly (even uihacker's "hasSetSelectedIndexOnce" flag doesn't fix this!). The code is still in early dev stage so use it at your own risk. Any comment is welcomed :)
Also, I added support to interface builder, and override setSelectedSegmentIndex so that it also updates the color. Enjoy!
CustomSegmentedControl.h
//
// CustomSegmentedControl.h
//
// Created by Hlung on 11/22/54 BE.
// Copyright (c) 2554 __MyCompanyName__. All rights reserved.
//
// Credit: http://uihacker.blogspot.com/2010/05/iphone-uisegmentedcontrol-custom-colors.html
#interface CustomSegmentedControl : UISegmentedControl {
UIColor *offColor,*onColor;
}
#property (nonatomic,retain) UIColor *offColor,*onColor;
-(id)initWithItems:(NSArray *)items offColor:(UIColor*)offcolor onColor:(UIColor*)oncolor;
#end
CustomSegmentedControl.m
#import "CustomSegmentedControl.h"
#interface CustomSegmentedControl (private)
-(void)setInitialMode;
-(void)toggleHighlightColors;
#end
#implementation CustomSegmentedControl
#synthesize offColor,onColor;
-(id)initWithItems:(NSArray *)items offColor:(UIColor*)offcolor onColor:(UIColor*)oncolor {
if (self = [super initWithItems:items]) {
// Initialization code
self.offColor = offcolor;
self.onColor = oncolor;
[self setInitialMode];
// default to 0, other values cause arbitrary highlighting bug
[self setSelectedSegmentIndex:0];
}
return self;
}
- (void)awakeFromNib {
// default colors
self.offColor = [UIColor colorWithWhite:0.8 alpha:1];
self.onColor = self.tintColor;
[self setInitialMode];
[self setSelectedSegmentIndex:0];
}
-(void)setInitialMode
{
// set essential properties
[self setBackgroundColor:[UIColor clearColor]];
[self setSegmentedControlStyle:UISegmentedControlStyleBar];
// loop through children and set initial tint
for( int i = 0; i < [self.subviews count]; i++ )
{
[[self.subviews objectAtIndex:i] setTintColor:nil];
[[self.subviews objectAtIndex:i] setTintColor:offColor];
}
// listen for updates, [self setSelectedSegmentIndex:0] triggers UIControlEventValueChanged in 5.0, 4.3 doesn't (facepalm), use if( self.window ) to fix this
[self addTarget:self action:#selector(toggleHighlightColors) forControlEvents:UIControlEventValueChanged];
}
// ---------------
// hlung's version
// ---------------
-(void)toggleHighlightColors
{
// the subviews array order randomly changes all the time, change to check for "isSelected" instead
for (id v in self.subviews) {
if ([v isSelected]) [v setTintColor:onColor];
else [v setTintColor:offColor];
}
}
// override: update color when set selection
- (void)setSelectedSegmentIndex:(NSInteger)selectedSegmentIndex {
[super setSelectedSegmentIndex:selectedSegmentIndex];
[self toggleHighlightColors];
}
// ---------------
#end
Use this:
[[UISegmentedControl appearance] setTitleTextAttributes:#{NSForegroundColorAttributeName : [UIColor colorWithRed:255.0/255 green:37.0/255 blue:99.0/255 alpha:1.0]} forState:UIControlStateSelected];
Not sure if this will get approved by the app store, but I wrote a subclass to UISegmentedControl that lets you set a custom selected and unselected color. Check the notes for more info:
http://uihacker.blogspot.com/2010/05/iphone-uisegmentedcontrol-custom-colors.html
To clarify the answer provided above by #jothikenpachi we found the following UISegmentController category worked well in iOS6 and allows for an arbitrary on/off color scheme on segments. Plus it will fail gracefully if the private methods isSelected/setTintColor: are changed in future OS releases. Caveats around private API calls, etc.
#implementation UISegmentedControl(CustomTintExtension) {
-(void) updateCustomTintColorOn:(UIColor*)onColor Off:(UIColor*)offColor {
// Convenience function to rest the tint colors after selection, called upon change of selected index
SEL tint = #selector(setTintColor:);
for (UIView *view in [self subviews]) {
// Loop through the views...
if (view && ([view respondsToSelector:tint])) {
[view performSelector:tint withObject:nil];
}
if (view && ([view respondsToSelector:tint])) {
[view performSelector:tint withObject:offColor];
}
}
// Checking if segment subview is selected...
SEL isSelected = #selector(isSelected);
for (UIView *view in [self subviews]) {
if ([view respondsToSelector:isSelected] && [view performSelector:isSelected withObject:nil])
{
[view performSelector:tint withObject:onColor];
break;
}
}
}
Note, this category method would be called from within the UISegmentController's - (IBAction) segmentAction: (id)sender method.
Also note that with iOS6 it seems you may need to call this method initially in the governing UIViewController's - (void)viewDidAppear:(BOOL)animated which may result in a animation flash. To minimize this, try setting the "offColor" as the UISegmentController's tintColor in IB.
I just ran into this issue on iOS 7, which works differently than iOS6.
In iOS 7, the color of the label for the selected segment is the same color as the UISegementControl background. The only way to change it on iOS 7 is to set the background color of the UISegmentControl.
segmentControl.backgroundColor = customColor;
I used this and it changed all the colors in one step.
mySegmentedControl.tintColor = [UIColor redColor]
I found I could use tag on the subviews with the same index as the segments, so that in any order they the segments will be colored correctly.
// In viewWillAppear set up the segmented control
// then for 3 segments:
self.navigationItem.titleView = segmentedControl;
//Order of subviews can change randomly!, so Tag them with same index as segment
[[[segmentedControl subviews]objectAtIndex:0]setTag:0];
[[[segmentedControl subviews]objectAtIndex:1]setTag:1];
[[[segmentedControl subviews]objectAtIndex:2]setTag:2];
// color follows the selected segment
- (IBAction)mySelector:(id)sender {
selector = [sender selectedSegmentIndex]
for (id seg in [segmentedControl subviews]) {
for (id label in [seg subviews]) {
if ([seg tag] == selector){
[seg setTintColor:selectedColor];
} else {
[seg setTintColor:nonSelectedColor];
}
}
}
}
// in viewDidAppear for returning to the view
[segmentedControl setSelectedSegmentIndex:selector];
for (id seg in [segmentedControl subviews]) {
for (id label in [seg subviews]) {
if ([seg tag] == selector){
[seg setTintColor:selectedColor];
} else {
[seg setTintColor:nonSelectedColor];
}
}
}
The top two solutions didn't work for me when switching between segments.
My solution was to handle the segment change event in my view controller and then call this method each time the segment is changed:
+ (void)setSegmentedControl:(UISegmentedControl *)segmentedControl
selectedColor:(UIColor *)selectedColor
deselectedColor:(UIColor *)deselectedColor
{
for (int i = 0; i < segmentedControl.subviews.count; i++)
{
id subView = [segmentedControl.subviews objectAtIndex:i];
if ([subView isSelected])
[subView setTintColor:selectedColor];
else
[subView setTintColor:deselectedColor];
}
}
I am wondering why anyone have not mentioned about UIAppearanceProxy
Apple Doc::
https://developer.apple.com/documentation/uikit/uisegmentedcontrol#1653545
Sample Code:
private class func applyUISegmentControlAppearance(){
let apperance = UISegmentedControl.appearance()
// Set Navigation bar Title colour
let unselAttrib = [NSForegroundColorAttributeName:UIColor.yellow,
NSFontAttributeName: UIFont.systemFont(ofSize: 15)]
let selAttrib = [NSForegroundColorAttributeName:UIColor.red,
NSFontAttributeName: UIFont.boldSystemFont(ofSize: 15)]
apperance.setTitleTextAttributes(unselAttrib, for: .normal)
apperance.setTitleTextAttributes(selAttrib, for: .selected)
}
Call From:
You can call this method in AppDelegate from
application(_ application: UIApplication, willFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool
For doing your kind of thing, one might have to access the undocumented features and hacks, which will certainly make apple furious, and that may lead to the rejection of your application.
Now, the solution lies in other trick that you use two buttons instead and have their images interchanged when they are clicked. Keep the buttons closer and images of half segmented control to give the illusion of segmented control and that is all I can suggest you.
Hope this helps.
Thanks,
Madhup
You can tag each of the segments, then set the TintColor forTag:
#define kTagOffState 0
#define kTagOnState 2
#define UIColorFromRGB(rgbValue) [UIColor \
colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \
green:((float)((rgbValue & 0xFF00) >> 8))/255.0 \
blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
//usage UIColor color = UIColorFromRGB(0xF7F7F7);
UIColor onColor = UIColorFromRGB(0xF7F7F7);
UIColor offColor = UIColorFromRGB(0x878787);
[multiStateControl setTag:kTagOffState forSegmentAtIndex:0];
[multiStateControl setTag:kTagOnState forSegmentAtIndex:1];
[multiStateControl setTintColor:onColor forTag:kTagOnState];
[multiStateControl setTintColor:offColor forTag:kTagOffState];
I found the answers above very helpful. I am using the segmented control to set the precision of a knob. I took a hybrid of the answers above and came up with this:
-(void) viewDidLoad {
NSArray *segments = [NSArray arrayWithObjects:#"Course", #"Fine",nil];
[knob setPrecision:0.1]; // initial precision
// Set starting values
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:segments];
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
segmentedControl.frame = CGRectMake(120, 680, 228, 30);
[segmentedControl addTarget:self action:#selector(precisionSelect:) forControlEvents:UIControlEventValueChanged];
segmentedControl.momentary = YES;
[self.view addSubview:segmentedControl];
}
- (void)precisionSelect:(UISegmentedControl*)sender
{
UIColor *tintcolor = [UIColor darkGrayColor];
if (sender.selectedSegmentIndex == 0) {
[[sender.subviews objectAtIndex:0] setTintColor:nil];
[[sender.subviews objectAtIndex:1] setTintColor:tintcolor];
[knob setPrecision:0.1]; // Coarse
} else {
[[sender.subviews objectAtIndex:0] setTintColor:tintcolor];
[[sender.subviews objectAtIndex:1] setTintColor:nil];
[knob setPrecision:0.05]; // Fine
}
}
Hope this helps others..
A key for me, was being able to reset the unselected index using: setTintColor:nil];
- (IBAction)segmentControlValueChanged:(UISegmentedControl *)sender
{
if ([[sender.subviews firstObject] respondsToSelector:#selector(setTintColor:)]) {
for (id segment in sender.subviews) {
if ([segment respondsToSelector:#selector(isSelected)] && [segment isSelected]) {
[segment setTintColor:[UIColor redColor]];
} else {
[segment setTintColor:[UIColor grayColor]];
}
}
}
}
Try this solution.
#IBAction func dashBoardSegmentValueChanged(sender: AnyObject) {
switch dashBoardSegment.selectedSegmentIndex
{
case 0:
sender.subviews.last?.backgroundColor = UIColor.whiteColor()
sender.subviews.first?.backgroundColor = UIColor.clearColor()
break;
case 1:
sender.subviews.first?.backgroundColor = UIColor.whiteColor()
sender.subviews.last?.backgroundColor = UIColor.clearColor()
break;
default:
break;
}
}
Note: Make sure you select one segment subview as initial selected for easiness. It works if you have two segment subviews.
- (IBAction)segmentedControlValueChanged:(UISegmentedControl *)sender {
for (int i = 0; i < sender.subviews.count; i++) {
UIControl *component = [sender.subviews objectAtIndex:i];
if ([component respondsToSelector:#selector(isSelected)]) {
UIColor *selectedColor = [UIColor greenColor];
UIColor *normalColor = [UIColor blackColor];
UIColor *tint = component.isSelected ? selectedColor : normalColor;
[component setTintColor:tint];
}
}
}
[segmentedControl setSelectedSegmentTintColor:[UIColor darkGrayColor]];
//For iOS 13
This Swift 4 code works for me
segmentedControl.setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.red], for: .selected)
I am working on a subclass of UIImageView and one of the things I require is when the object is initalised with the initWithImage: message a 'copy' is created.
I must be confusing something because I can't see what is not working here..
- (id)initWithImage:(UIImage *)image {
[image retain];
if (self = [super initWithImage:image]) {
if (!maskImage) {
maskImage = [UIImage imageWithCGImage:[image CGImage]];
if (maskImage != nil) {
NSLog(#"Made mask image");
} else {
NSLog(#"Failed");
}
//maskImage = [UIImage imageNamed:#"image.png"];
}
}
[image release];
return self;
}
There are no errors when I build this and the maskimage does appear to be created (i do not get the failure message). However, if I uncomment the line allocating from a png it works.
What am I missing?
Thanks!
You should retain created image, in example like this:
- (id)initWithImage:(UIImage *)image {
if (self = [super initWithImage:image]) {
if (!maskImage) {
maskImage = [[UIImage imageWithCGImage:[image CGImage]] retain];
if (maskImage != nil) {
NSLog(#"Made mask image");
} else {
NSLog(#"Failed");
}
}
}
return self;
}
Try this. Should work.
- (id)initWithImage:(NSString *)image {
if (self = [super initWithImage:image]) {
if (!maskImage) {
img = [UIImage imageNamed:image];
maskImage = CGImageRetain(img.CGImage);
if (maskImage != nil) {
NSLog(#"Made mask image");
} else {
NSLog(#"Failed");
}
}
}
return self;
}
Changes
pass NSString instead of image
no need to retain/release image
need to define img, maskImage in .h
maskImage in .h should have retain property set in #property ( e.g.
#property (nonatomic, retain))
First, you should set maskImage to nil, to make sure it isn't garbage:
self.maskImage=nil;
That may screwing up your line (if not now, then later):
if(!imaskImage)
Then, to make a copy, just implement NSCopying in a UIImage subclass. It's easy to do. Then you can type:
maskImage = [image copy];
Alternatively, you can convert the image to data, archive, then unarchive, then convert back to a UIImage. This gives you a complete copy of the image. It's a little more complex, but its the same method used for making deep copies of an object graph.