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I would like to change the color of an image view when the user touches it. I don't need it to change a great deal. However, I would like it to change to a shade of blue. I found the following code to change the gradient but it is not having any effect. I don't need a gradient, actually, only a tint. Would appreciate any suggestions.
UIView *snapshot = [[UIImageView alloc] initWithImage:image];
snapshot.layer.masksToBounds = NO;
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.colors = #[(id)[UIColor redColor].CGColor, (id)[UIColor blackColor].CGColor];
[snapshot.layer insertSublayer:gradient atIndex:0];
An easy and non-intrusive way is to add a translucent overlay to your image view. This can then be shown and hidden as the button is pressed and released.
- (void)indicatedImageViewPressed:(UIImageView *)imageView on:(BOOL)on {
UIView *overlay = [imageView viewWithTag:1]; // See if already created
if (overlay == nil) {
overlay = [[UIView alloc] initWithFrame:imageView.bounds];
overlay.tag = 1; // Mark view to find it next time
overlay.backgroundColor = [UIColor colorWithRed:0.0 green:0.0 blue:1.0 alpha:0.3]; // Your color overlay goes here
[imageView addSubview:overlay];
}
overlay.hidden = !on;
}
You can try giving the UIImage a tint
UIImage *image = [[UIImage imageNamed:#"Your Image"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.tintColor = [UIColor clearColor]; // Or any color really you'd like would work
imageView.image = newImage;
And then changing that tint when the user touches the image using a tap gesture recognizer
I'm trying to change the back button arrow
I'm currently using the following to control the text size as well as the text color on the back button:
[[UIBarButtonItem appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor whiteColor], UITextAttributeTextColor,
[UIFont boldSystemFontOfSize:16.0f], UITextAttributeFont,
[UIColor darkGrayColor], UITextAttributeTextShadowColor,
[NSValue valueWithCGSize:CGSizeMake(0.0, -1.0)], UITextAttributeTextShadowOffset,
nil] forState:UIControlStateNormal];
but if I want to change only the arrow's color for the back button, what should i do?
To change the back button chevron color for a specific navigation controller*:
self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
*If you are using an app with more than 1 navigation controller, and you want this chevron color to apply to each, you may want to use the appearance proxy to set the back button chevron for every navigation controller, as follows:
[[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];
And for good measure, in swift (thanks to Jay Mayu in the comments):
UINavigationBar.appearance().tintColor = UIColor.whiteColor()
You have to set the tintColor of the entire app.
self.window.tintColor = [UIColor redColor];
Or in Swift 3:
self.window?.tintColor = UIColor.blue
Source: iOS 7 UI Transition Guide
You can set the color on the entire app navigation's bar using the method
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:
(NSDictionary *)launchOptions{
[[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];
}
It is possible to change only arrow's color (not back button title's color) on this way:
[[self.navigationController.navigationBar.subviews lastObject] setTintColor:[UIColor blackColor]];
Navigation bar contains subview of _UINavigationBarBackIndicatorView type (last item in subviews array) which represents arrow.
Result is navigation bar with different colors of back button arrow and back button title
If you are using storyboards you could set the navigation bar tint colour.
Inside the rootViewController that initializes the navigationController, I put this code inside my viewDidAppear method:
//set back button color
[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor], UITextAttributeTextColor,nil] forState:UIControlStateNormal];
//set back button arrow color
[self.navigationController.navigationBar setTintColor:[UIColor whiteColor]];
In iOS 6, tintColor tinted the background of navigation bars, tab bars, toolbars, search bars, and scope bars. To tint a bar background in iOS 7, use the barTintColor property instead.
iOS 7 Design Resources iOS 7 UI Transition Guide
You can set the tintColor property on the button (or bar button item) or the view controller's view. By default, the property will inherit the tint from the parent view, all the way up to the top level UIWindow of your app.
I had to use both:
[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil]
setTitleTextAttributes:[NSDictionary
dictionaryWithObjectsAndKeys:[UIColor whiteColor], UITextAttributeTextColor,nil]
forState:UIControlStateNormal];
[[self.navigationController.navigationBar.subviews lastObject] setTintColor:[UIColor whiteColor]];
And works for me, thank you for everyone!
UINavigationBar *nbar = self.navigationController.navigationBar;
if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
//iOS 7
nbar.barTintColor = [UIColor blueColor]; // bar color
//or custom color
//[UIColor colorWithRed:19.0/255.0 green:86.0/255.0 blue:138.0/255.0 alpha:1];
nbar.navigationBar.translucent = NO;
nbar.tintColor = [UIColor blueColor]; //bar button item color
} else {
//ios 4,5,6
nbar.tintColor = [UIColor whiteColor];
//or custom color
//[UIColor colorWithRed:19.0/255.0 green:86.0/255.0 blue:138.0/255.0 alpha:1];
}
Update Swift 3
navigationController?.navigationItem.rightBarButtonItem?.tintColor = UIColor.yellow
navigationController?.navigationBar.tintColor = UIColor.red
navigationController?.navigationBar.barTintColor = UIColor.gray
navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.blue]
Result:
Just to change the NavigationBar color you can set the tint color like below.
[[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];
In case you're making custom back button basing on UIButton with image of arrow, here is the subclass snippet.
Using it you can either create button in code or just assign class in Interface Builder to any UIButton.
Back Arrow Image will be added automatically and colored with text color.
#interface UIImage (TintColor)
- (UIImage *)imageWithOverlayColor:(UIColor *)color;
#end
#implementation UIImage (TintColor)
- (UIImage *)imageWithOverlayColor:(UIColor *)color
{
CGRect rect = CGRectMake(0.0f, 0.0f, self.size.width, self.size.height);
if (UIGraphicsBeginImageContextWithOptions) {
CGFloat imageScale = 1.0f;
if ([self respondsToSelector:#selector(scale)])
imageScale = self.scale;
UIGraphicsBeginImageContextWithOptions(self.size, NO, imageScale);
}
else {
UIGraphicsBeginImageContext(self.size);
}
[self drawInRect:rect];
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetBlendMode(context, kCGBlendModeSourceIn);
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
#end
#import "iOS7backButton.h"
#implementation iOS7BackButton
-(void)awakeFromNib
{
[super awakeFromNib];
BOOL is6=([[[UIDevice currentDevice] systemVersion] floatValue] <7);
UIImage *backBtnImage = [[UIImage imageNamed:#"backArrow"] imageWithOverlayColor:self.titleLabel.textColor];
[self setImage:backBtnImage forState:UIControlStateNormal];
[self setTitleEdgeInsets:UIEdgeInsetsMake(0, 5, 0, 0)];
[self setImageEdgeInsets:UIEdgeInsetsMake(0, is6?0:-10, 0, 0)];
}
+ (UIButton*) buttonWithTitle:(NSString*)btnTitle andTintColor:(UIColor*)color {
BOOL is6=([[[UIDevice currentDevice] systemVersion] floatValue] <7);
UIButton *backBtn=[[UIButton alloc] initWithFrame:CGRectMake(0, 0, 60, 30)];
UIImage *backBtnImage = [[UIImage imageNamed:#"backArrow"] imageWithOverlayColor:color];
[backBtn setImage:backBtnImage forState:UIControlStateNormal];
[backBtn setTitleEdgeInsets:UIEdgeInsetsMake(0, is6?5:-5, 0, 0)];
[backBtn setImageEdgeInsets:UIEdgeInsetsMake(0, is6?0:-10, 0, 0)];
[backBtn setTitle:btnTitle forState:UIControlStateNormal];
[backBtn setTitleColor:color /*#007aff*/ forState:UIControlStateNormal];
return backBtn;
}
#end
If you want to change only the Back Arrow BUT on the entire app, do this:
[[NSClassFromString(#"_UINavigationBarBackIndicatorView") appearance]
setTintColor:[UIColor colorWithHexString: #"#f00000"]];
In iOS 7, you can put the following line of code inside application:didFinishLaunchingWithOptions: in your AppDelegate.m file:
[[UINavigationBar appearance] setTintColor:myColor];
Set myColor to the color you want the back button to be throughout the entire app. No need to put it in every file.
Swift 2.0: Coloring Navigation Bar & buttons
navigationController?.navigationBar.barTintColor = UIColor.blueColor()
navigationController?.navigationBar.tintColor = UIColor.whiteColor()
navigationController!.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.whiteColor()]
In swift 3 , to change UIBarButton back button arrow color
self.navigationController?.navigationBar.tintColor = UIColor.black
I would like to remove the gradient effect that occurs in the UINavigationBar and UITabBar. The following picture shows an example tab bar using the custom UIColor of 7/29/88 (RGB), set using setTintColor:color and as you can see, the tab bar has a gloss in the top half of the bar.
How do I remove this?
Depends on your definition of "remove". In iOS 6.x (didn't test iOS 4/5) the following works.
// this will show a tab bar with a solid background color
tabBar.backgroundImage = [UIImage new];
tabBar.backroundColor = [UIColor blueColor];
// this will show a navigation bar with a solid background color
[navBar setBakgroundImage:[UIImage new]
forBarMetrics:UIBarMetricsDefault]];
navBar.shadowImage = [UIImage new];
navBar.backgroundColor = [UIColor blueColor];
navBar.tintColor = [UIColor blueColor];
It's not possible. However you can use custom background images. Check UIAppearance documentation
I remove the gradient effect from my Navigation Bar, you can try this code and see if its works for you too.
//First, create your own Navigation Bar Class, and add this to your init method.
self.tintColor = [UIColor clearColor];
self.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"yourImage"]];
//Add this to your DrawRect method
- (void)drawRect:(CGRect)rect {
UIColor *color = [UIColor colorWithPatternImage:[UIImage imageNamed:#"yourImage"]];
//If you want a plain color change this
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColor(context, CGColorGetComponents([color CGColor]));
CGContextFillRect(context, rect);
}
I'm able to change the backgroung image of UINavigationController by overriding drawRect: method:
#implementation UINavigationBar (UINavigationBarCategory)
- (void)drawRect:(CGRect)rect {
UIImage *img = [UIImage imageNamed: #"navController.png"];
[img drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
self.tintColor = [UIColor blueColor];
}
#end
the background is what I intended to be and the tintColor as well, but when trying to set a color that isn't existing in UIColor class it fails and shows strange color:
#implementation UINavigationBar (UINavigationBarCategory)
- (void)drawRect:(CGRect)rect {
UIImage *img = [UIImage imageNamed: #"navController.png"];
[img drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
self.tintColor = [UIColor colorWithRed:(26/255) green:(103/255) blue:(159/255) alpha:1];
}
#end
How can I force UINavigationBar to show the color I want?
Note: I'm only having a problem with navigation controller buttons color since the background itself is set to image.
You need to do this:
self.tintColor = [UIColor colorWithRed:(26.0f/255.0f) green:(103.0f/255.0f) blue:(159.0f/255.0f) alpha:1.0f];
Otherwise you're doing integer arithmetic and you'll end up with 0 for all of them probably. Use floating point arithmetic and you get the values you desire.
This Works for me
self.navigationController.navigationBar.backgroundColor= [UIColor colorWithRed:57.0/255.0 green:158.0/255 blue:209.0/255 alpha:1.0];
You can also use:
navigationController.view.backgroundColor = .yourColor
The UINavigationBar and UISearchBar both have a tintColor property that allows you to change the tint color (surprising, I know) of both of those items. I want to do the same thing to the UITabBar in my application, but have found now way to change it from the default black color. Any ideas?
iOS 5 has added some new appearance methods for customising the look of most UI elements.
You can target every instance of a UITabBar in your app by using the appearance proxy.
For iOS 5 + 6:
[[UITabBar appearance] setTintColor:[UIColor redColor]];
For iOS 7 and above, please use the following:
[[UITabBar appearance] setBarTintColor:[UIColor redColor]];
Using the appearance proxy will change any tab bar instance throughout the app. For a specific instance, use one of the new properties on that class:
UIColor *tintColor; // iOS 5+6
UIColor *barTintColor; // iOS 7+
UIColor *selectedImageTintColor;
UIImage *backgroundImage;
UIImage *selectionIndicatorImage;
I have been able to make it work by subclassing a UITabBarController and using private classes:
#interface UITabBarController (private)
- (UITabBar *)tabBar;
#end
#implementation CustomUITabBarController
- (void)viewDidLoad {
[super viewDidLoad];
CGRect frame = CGRectMake(0.0, 0.0, self.view.bounds.size.width, 48);
UIView *v = [[UIView alloc] initWithFrame:frame];
[v setBackgroundColor:kMainColor];
[v setAlpha:0.5];
[[self tabBar] addSubview:v];
[v release];
}
#end
I have an addendum to the final answer. While the essential scheme is correct, the trick of using a partially transparent color can be improved upon. I assume that it's only for letting the default gradient to show through. Oh, also, the height of the TabBar is 49 pixels rather than 48, at least in OS 3.
So, if you have a appropriate 1 x 49 image with a gradient, this is the version of viewDidLoad you should use:
- (void)viewDidLoad {
[super viewDidLoad];
CGRect frame = CGRectMake(0, 0, 480, 49);
UIView *v = [[UIView alloc] initWithFrame:frame];
UIImage *i = [UIImage imageNamed:#"GO-21-TabBarColorx49.png"];
UIColor *c = [[UIColor alloc] initWithPatternImage:i];
v.backgroundColor = c;
[c release];
[[self tabBar] addSubview:v];
[v release];
}
When you just use addSubview your buttons will lose clickability, so instead of
[[self tabBar] addSubview:v];
use:
[[self tabBar] insertSubview:v atIndex:0];
There is no simple way to do this, you basically need to subclass UITabBar and implement custom drawing to do what you want. It is quite a bit of work for the effect, but it may be worth it. I recommend filing a bug with Apple to get it added to a future iPhone SDK.
Following is the perfect solution for this. This works fine with me for iOS5 and iOS4.
//---- For providing background image to tabbar
UITabBar *tabBar = [tabBarController tabBar];
if ([tabBar respondsToSelector:#selector(setBackgroundImage:)]) {
// ios 5 code here
[tabBar setBackgroundImage:[UIImage imageNamed:#"image.png"]];
}
else {
// ios 4 code here
CGRect frame = CGRectMake(0, 0, 480, 49);
UIView *tabbg_view = [[UIView alloc] initWithFrame:frame];
UIImage *tabbag_image = [UIImage imageNamed:#"image.png"];
UIColor *tabbg_color = [[UIColor alloc] initWithPatternImage:tabbag_image];
tabbg_view.backgroundColor = tabbg_color;
[tabBar insertSubview:tabbg_view atIndex:0];
}
On iOS 7:
[[UITabBar appearance] setBarTintColor:[UIColor colorWithRed:(38.0/255.0) green:(38.0/255.0) blue:(38.0/255.0) alpha:1.0]];
I also recommend setting first depending on your visual desires:
[[UITabBar appearance] setBarStyle:UIBarStyleBlack];
The bar style puts a subtle separator between your view content and your tab bar.
[[self tabBar] insertSubview:v atIndex:0];
works perfectly for me.
for me its very simple to change the color of Tabbar like :-
[self.TabBarController.tabBar setTintColor:[UIColor colorWithRed:0.1294 green:0.5686 blue:0.8353 alpha:1.0]];
[self.TabBarController.tabBar setTintColor:[UIColor "YOUR COLOR"];
Try this!!!
[[UITabBar appearance] setTintColor:[UIColor redColor]];
[[UITabBar appearance] setBarTintColor:[UIColor yellowColor]];
for just background color
Tabbarcontroller.tabBar.barTintColor=[UIColor redcolour];
or this in App Delegate
[[UITabBar appearance] setBackgroundColor:[UIColor blackColor]];
for changing color of unselect icons of tabbar
For iOS 10:
// this code need to be placed on home page of tabbar
for(UITabBarItem *item in self.tabBarController.tabBar.items) {
item.image = [item.image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
}
Above iOS 10:
// this need to be in appdelegate didFinishLaunchingWithOptions
[[UITabBar appearance] setUnselectedItemTintColor:[UIColor blackColor]];
There are some good ideas in the existing answers, many work slightly differently and what you choose will also depend on which devices you target and what kind of look you're aiming to achieve. UITabBar is notoriously unintuitive when it come to customizing its appearance, but here are a few more tricks that may help:
1). If you're looking to get rid of the glossy overlay for a more flat look do:
tabBar.backgroundColor = [UIColor darkGrayColor]; // this will be your background
[tabBar.subviews[0] removeFromSuperview]; // this gets rid of gloss
2). To set custom images to the tabBar buttons do something like:
for (UITabBarItem *item in tabBar.items){
[item setFinishedSelectedImage:selected withFinishedUnselectedImage:unselected];
[item setImageInsets:UIEdgeInsetsMake(6, 0, -6, 0)];
}
Where selected and unselected are UIImage objects of your choice. If you'd like them to be a flat colour, the simplest solution I found is to create a UIView with the desired backgroundColor and then just render it into a UIImage with the help of QuartzCore. I use the following method in a category on UIView to get a UIImage with the view's contents:
- (UIImage *)getImage {
UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, [[UIScreen mainScreen]scale]);
[[self layer] renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return viewImage;
}
3) Finally, you may want to customize the styling of the buttons' titles. Do:
for (UITabBarItem *item in tabBar.items){
[item setTitleTextAttributes: [NSDictionary dictionaryWithObjectsAndKeys:
[UIColor redColor], UITextAttributeTextColor,
[UIColor whiteColor], UITextAttributeTextShadowColor,
[NSValue valueWithUIOffset:UIOffsetMake(0, 1)], UITextAttributeTextShadowOffset,
[UIFont boldSystemFontOfSize:18], UITextAttributeFont,
nil] forState:UIControlStateNormal];
}
This lets you do some adjustments, but still quite limited. Particularly, you cannot freely modify where the text is placed within the button, and cannot have different colours for selected/unselected buttons. If you want to do more specific text layout, just set UITextAttributeTextColor to be clear and add your text into the selected and unselected images from part (2).
[v setBackgroundColor ColorwithRed: Green: Blue: ];
Another solution (which is a hack) is to set the alpha on the tabBarController to 0.01 so that it is virtually invisible yet still clickable. Then set a an ImageView control on the bottom of the MainWindow nib with your custom tabbar image underneath the alpha'ed tabBarCOntroller. Then swap the images, change colors or hightlight when the tabbarcontroller switches views.
However, you lose the '...more' and customize functionality.
Hi There am using iOS SDK 4 and i was able to solve this issue with just two lines of code and it's goes like this
tBar.backgroundColor = [UIColor clearColor];
tBar.backgroundImage = [UIImage imageNamed:#"your-png-image.png"];
Hope this helps!
if ([tabBar respondsToSelector:#selector(setBackgroundImage:)]) {
// ios 5 code here
[tabBar setBackgroundImage:[UIImage imageNamed:#"image.png"]];
}
else {
// ios 4 code here
CGRect frame = CGRectMake(0, 0, 480, 49);
UIView *tabbg_view = [[UIView alloc] initWithFrame:frame];
UIImage *tabbag_image = [UIImage imageNamed:#"image.png"];
UIColor *tabbg_color = [[UIColor alloc] initWithPatternImage:tabbag_image];
tabbg_view.backgroundColor = tabbg_color;
[tabBar insertSubview:tabbg_view atIndex:0];
}
Swift 3.0 answer: (from Vaibhav Gaikwad)
For changing color of unselect icons of tabbar:
if #available(iOS 10.0, *) {
UITabBar.appearance().unselectedItemTintColor = UIColor.white
} else {
// Fallback on earlier versions
for item in self.tabBar.items! {
item.image = item.image?.withRenderingMode(UIImageRenderingMode.alwaysOriginal)
}
}
For changing text color only:
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.white], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.red, for: .selected)
Swift 3 using appearance from your AppDelegate do the following:
UITabBar.appearance().barTintColor = your_color