i have 3 navigation controller and i want to change each background using different image. I was implement a category that extends UINavigationBar like this :
- (void)drawRect:(CGRect)rect {
UIImage *image = [UIImage imageNamed:#"background.png"];
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];}
#end
but it make every navigation bar have a same background image. And then i try to implement code like this :
- (void)viewDidLoad {
[super viewDidLoad];
self.navigationController.navigationBar.tintColor = [UIColor blackColor];
UIImageView *backGroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"background.png"]];
[self.navigationController.navigationBar insertSubview:backGroundView atIndex:0];
[backGroundView release];
}
in every controller but each background just show the tintColor, not the image...what should I do???
and how if i want to do that too in tabbarController??
On each of your views, implement the following in your viewWillAppear: method
#import <QuartzCore/QuartzCore.h>
...
- (void)viewWillAppear:(BOOL)animated
{
self.navigationController.navigationBar.layer.contents = (id)[UIImage imageNamed:#"yourImageBgHere"].CGImage;
}
Cheers,
Rog
Related
Whenever we show popover the neighbhouring areas show different kind of gray color and the active tab bar icon color changes from blue to gray till pop over is there.
when the popover is dismissed , the grey shade gets removed
I would like to remove the color when the the popover is visible
I googled but I couldn't find anyway seems like this default behaviour.
any help to help me fix the problem is appreciated
Thanks
For achieve this, you can create own custom popover background of UIPopoverBackgroundView.
you can find the below code for creating custom CustomPopoverBgView.
CustomPopoverBgView.h
#import <UIKit/UIKit.h>
#interface CustomPopoverBgView : UIPopoverBackgroundView
{
UIImageView *_borderImageView;
UIImageView *_arrowView;
CGFloat _arrowOffset;
UIPopoverArrowDirection _arrowDirection;
}
#end
CustomPopoverBgView.m
#import "CustomPopoverBgView.h"
#define CONTENT_INSET 10.0
#define CAP_INSET 25.0
#define ARROW_BASE 25.0
#define ARROW_HEIGHT 25.0
-(instancetype)initWithFrame:(CGRect)frame{
self = [super initWithFrame:frame];
if(self){
self.layer.shadowColor = [[UIColor clearColor] CGColor];
_borderImageView = [[UIImageView alloc] initWithImage:[[UIImage imageNamed:#"popover-bg.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(CAP_INSET,CAP_INSET,CAP_INSET,CAP_INSET)]];
_arrowView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"arrow.png"]];
[self addSubview:_borderImageView];
[self addSubview:_arrowView];
}
return self;
}
+(UIEdgeInsets)contentViewInsets{
return UIEdgeInsetsMake(CONTENT_INSET, CONTENT_INSET, CONTENT_INSET, CONTENT_INSET);
}
+(CGFloat)arrowHeight{
return ARROW_HEIGHT;
}
+(CGFloat)arrowBase{
return ARROW_BASE;
}
- (CGFloat) arrowOffset {
return _arrowOffset;
}
- (void) setArrowOffset:(CGFloat)arrowOffset {
_arrowOffset = arrowOffset;
}
- (void)setArrowDirection:(UIPopoverArrowDirection)arrowDirection {
_arrowDirection = arrowDirection;
}
- (UIPopoverArrowDirection)arrowDirection {
return _arrowDirection;
}
#end
Calling of CustomPopoverBgView in UIPopoverController
UIButton *btn = (UIButton *)sender;
ViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:#"dddddd"];
controller.view.backgroundColor = [UIColor redColor];
UIPopoverController *popoverController = [[UIPopoverController alloc] initWithContentViewController:controller] ;
popoverController.popoverBackgroundViewClass = [CustomPopoverBgView class];
[popoverController presentPopoverFromRect:btn.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:true];
Hope this will help you.
Create your own custom popover view and add it as a subview on top of your main view instead of the default one Apple provided.
I have a GameOver UIView that I call from inside my main UIViewController. It is just a 'popover' window that has the text game over, the score, and some blur effects to blur the main UIViewcontroller.
I try to pass an int to the UIView, but it doesn't accept it unless it is in the - (void)drawRect:(CGRect)rect method.
If I move the score label to drawRect method, the label is updated. But the blur effects go away.
What am I doing wrong?
MainViewController.m
#import "GameOverView.h"
#interface ViewController () {
GameOverView * gov;
}
- (void) showGameOver {
gov = [[GameOverView alloc] initWithFrame:self.view.bounds];
NSLog(#"Passing score of: %i", self.score);
gov.finalScore = self.score;
[self.view addSubview:gov];
}
GameOverView.h
#interface GameOverView : UIView {}
#property (nonatomic) int finalScore;
#end
GameOverView.M
#implementation GameOverView
- (id) initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
// Initialization code
//self.backgroundColor = [UIColor redColor];
NSLog(#"Score:%i", self.finalScore );
UIVisualEffect *blurEffect;
blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
UIVisualEffectView *visualEffectView;
visualEffectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];
visualEffectView.frame = super.bounds;
[super addSubview:visualEffectView];
UILabel * lblGameOver = [[UILabel alloc] initWithFrame:CGRectMake(0,0, frame.size.width, 200)];
lblGameOver.center = CGPointMake(frame.size.width/2, 100);
lblGameOver.text = [NSString stringWithFormat: #"GAME OVER %i", self.finalScore];
[self addSubview:lblGameOver];
UIButton * button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, 200)];
button.center = CGPointMake(frame.size.width/2, 200);
[button setTitle:#"Start New Game" forState:UIControlStateNormal];
[button addTarget:self action:#selector(removeSelfFromSuperview) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:button];
}
return self;
}
- (void) removeSelfFromSuperview{
[self removeFromSuperview];
}
You are using the finalScore property in the init method of the GameOverView class, but you are only setting its value after initializing it.
Change your initialization method to
- (id) initWithFrame:(CGRect)frame finalScore:(int)fs{
// use 'fs' instead of 'self.finalScore'
}
It should work.
I wonder how there isn't any problem with the view background color. You are initializing the view and adding it as subview like this:
gov = [[GameOverView alloc] initWithFrame:self.view.bounds];
gov.finalScore = self.score;
[self.view addSubview:gov];
This will give the view background color as black which is default color. So you don't find much difference if you use blur effect.
you need to give the color for the view during the initialization :
gov = [[GameOverView alloc] initWithFrame:self.view.bounds];
[gov setBackgroundColor:[UIColor yourColor]];
[self.view addSubview:gov];
If you are planning to keep the code in initWithFrame, you don't need to worry about setting the background color. If you keep the code in drawRect, then you must set the background color,else it will be black color.
When coming to setting the score label, it doesn't matter whether you put it in drawRect or initWithFrame method. Make sure you use drawRect method only if you really have to draw on the view,so that you can call it later by using setNeedsDisplay
I'm trying to show a badge on some UITabBarItems that are configured with an image with UIImageRenderingModeAlwaysOriginal. I'm doing this because the desired effect is something like a raised UITabBarItem a-la Instagram. This is the code I'm using to test this (it's in a UITabBarController category):
- (void) replaceImageForTab:(int)itemIndex
defaultImage:(UIImage *)defaultImage
selectedImage:(UIImage *)selectedImage
title:(NSString *)title
{
NSArray *viewControllers = [self viewControllers];
UIViewController *vc = [viewControllers objectAtIndex:itemIndex];
[vc.tabBarItem setImage:[defaultImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
[vc.tabBarItem setSelectedImage:[selectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
[vc.tabBarItem setTitle:title];
[vc.tabBarItem setBadgeValue:#"1"];
}
However, the badges images are shown clipped, like shown in here:
I think is because the badge is being added within the UITabBar's UIView, and it is clipping its contents. But I can't modify that value since that's a private property. What other options do I have here?
I haven't found a way to change the offset in the stock badges, so I had to roll out my own solution. It's not pretty, but it works (this is, again, on a UITabBarController category):
- (void) v_setBadgeValue:(NSString *)badgeValue inTab:(NSInteger)tabIndex
{
NSArray *viewControllers = [self viewControllers];
UIViewController *vc = [viewControllers objectAtIndex:tabIndex];
UITabBarItem *tabBarItem = vc.tabBarItem;
UIImage *normalImage = tabBarItem.image;
UIImage *selectedImage = tabBarItem.selectedImage;
UIImage *badgedNormalImage = [[self class] addBadgeWithValue:badgeValue toImage:normalImage];
UIImage *badgedSelectedImage = [[self class] addBadgeWithValue:badgeValue toImage:selectedImage];
[tabBarItem setImage:[badgedNormalImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
[tabBarItem setSelectedImage:[badgedSelectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
}
+ (UIImage *) addBadgeWithValue:(NSString *)badgeValue toImage:(UIImage *)image
{
//Here you have to create your badge view. Let's just use a red square for now
UIView *badgeView = [[UIView alloc] initWithFrame:CGRectMake(16, 3, 14, 14)];
[badgeView setBackgroundColor:[UIColor redColor]];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[imageView addSubview:badgeView];
UIGraphicsBeginImageContextWithOptions((imageView.bounds.size), NO, [[UIScreen mainScreen] scale]);
[imageView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return viewImage;
}
Now you're in complete control of the badges offset and position, that's important if you, like me, have a very strange UITabBar to work with. This is the result:
I was just testing my app with iOS 6.0 and Xcode 4.5GM and I have set up a view like this:
[self.view setBackgroundColor:[UIColor groupTableViewBackgroundColor]];
So, the view has the same pattern than a common table view.
This works fine on iOS 4 and 5, but in iOS 6 it just gives me a white background.
Is this deprecated? If so, how can I replace it?
Thanks
This method will be deprecated during the 6.0 seed program
If you want to have a background in your own view that looks like the table view background,
then you should create an empty table view and place it behind your content.
First, add this to your viewDidLoad:
self.tableView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"tableViewBackground.png"]];
OR
self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"tableViewBackground.png"]];
Then add this images to your app:
tableViewBackground.png
tableViewBackground#2x.png
I've written a UIColor category to replace groupTableViewBackgroundColor:
#interface UIColor (UITableViewBackground)
+ (UIColor *)groupTableViewBackgroundColor;
#end
#implementation UIColor (UITableViewBackground)
+ (UIColor *)groupTableViewBackgroundColor
{
__strong static UIImage* tableViewBackgroundImage = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
UIGraphicsBeginImageContextWithOptions(CGSizeMake(7.f, 1.f), NO, 0.0);
CGContextRef c = UIGraphicsGetCurrentContext();
[[self colorWithRed:185/255.f green:192/255.f blue:202/255.f alpha:1.f] setFill];
CGContextFillRect(c, CGRectMake(0, 0, 4, 1));
[[self colorWithRed:185/255.f green:193/255.f blue:200/255.f alpha:1.f] setFill];
CGContextFillRect(c, CGRectMake(4, 0, 1, 1));
[[self colorWithRed:192/255.f green:200/255.f blue:207/255.f alpha:1.f] setFill];
CGContextFillRect(c, CGRectMake(5, 0, 2, 1));
tableViewBackgroundImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
});
return [self colorWithPatternImage:tableViewBackgroundImage];
}
#end
This solution also allows to tweak the appearance of the background. Feel free to change the drawing code :)
In iOS6 SKD, comments in UIInterface.h suggest the following:
Group style table view backgrounds can no longer be represented by
a simple color.
If you want to have a background in your own view
that looks like the table view background, then you should create
an empty table view and place it behind your content.
This method will be deprecated during the 6.0 seed program
A simple solution is to set the background with equivalent RGB values:
[self.view setBackgroundColor:[UIColor colorWithRed:215.0/255.0 green:217.0/255.0 blue:223.0/255.0 alpha:1.0]];
You can them set the view background to color to White or whatever you like in the xib to suppress the warning.
If it helps anyone, here's specifically what I'm doing in my custom view to get this background (using hint from Mr Beloeuvre)
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor clearColor];
UITableView *tv = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStyleGrouped];
[self.view addSubview:tv];
[self.view sendSubviewToBack:tv];
// ...
}
Try this:
[myTableView setBackgroundView:nil];
[myTableView setBackgroundView:[[[UIView alloc] init] autorelease]];
You may have difficult time to locate the view if you use storyboard and have many views. You can click on "Show the Version editor" button the right top corner. This will change story view to XML text view. Search for "groupTableViewBackGroundColor". You should find views with this attribute.
It's good idea to use standard methods for previous iOs versions. So I improved solution of James Boutcher:
+ (void)setBackgroundColorForTableView:(UITableView*) tableView
{
UIColor* color = [UIColor whiteColor];
NSString* version = [[UIDevice currentDevice] systemVersion];
if([version floatValue] < 6.0)
{
tableView.backgroundColor = color;
}
else
{
tableView.backgroundView = nil;
UIView* bv = [[UIView alloc] init];
bv.backgroundColor = color;
tableView.backgroundView = bv;
[bv release];
}
}
Elaborating on #NSElvis's solution, here is the identical grouped table view background asset (it's wide enough so you don't get funny effects in landscape orientation)
back-tableview#2x.png
To use it, simply do
[YOUR_VIEW setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"back-tableview"]]];
Is it possible to set some image as title of Navigation bar?
I think NYTimes application used a Navigation bar and title is look like image file (the reason why it's seems UINavigationBar is because they use right button to search).
You can use an UIImageView for the UINavigationItem.titleView property, something like:
self.navigationItem.titleView = myImageView;
I find that a transparent .png at about 35px in height has worked well.
- (void)awakeFromNib {
//put logo image in the navigationBar
UIImageView* img = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"logo.png"]];
self.navigationItem.titleView = img;
[img release];
}
You can do it right from storyboard (as of Xcode 7):
Create a view outside main view of view controller. It can be a nested view or just an image
Add navigation item to your view controller
Ctrl+ drag from navigation item and drop on outside view
4.select title view
I have created a custom category for UINavigationBar as follows
UINavigationBar+CustomImage.h
#import <UIKit/UIKit.h>
#interface UINavigationBar (CustomImage)
- (void) setBackgroundImage:(UIImage*)image;
- (void) clearBackgroundImage;
- (void) removeIfImage:(id)sender;
#end
UINavigationBar+CustomImage.m
#import "UINavigationBar+CustomImage.h"
#implementation UINavigationBar (CustomImage)
- (void) setBackgroundImage:(UIImage*)image {
if (image == NULL) return;
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake(110,5,100,30);
[self addSubview:imageView];
[imageView release];
}
- (void) clearBackgroundImage {
NSArray *subviews = [self subviews];
for (int i=0; i<[subviews count]; i++) {
if ([[subviews objectAtIndex:i] isMemberOfClass:[UIImageView class]]) {
[[subviews objectAtIndex:i] removeFromSuperview];
}
}
}
#end
I invoke it from my UINavigationController
[[navController navigationBar] performSelectorInBackground:#selector(setBackgroundImage:) withObject:image];
This line will work for you, I always use this
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:#"imageNavBar.png"] forBarMetrics:UIBarMetricsDefault];
I modified the UINavigationBar+CustomImage.m to have the title still visible to the user. Just use insertSubview: atIndex: instead of addSubview:
UINavigationBar+CustomImage.m
#import "UINavigationBar+CustomImage.h"
#implementation UINavigationBar (CustomImage)
- (void) setBackgroundImage:(UIImage*)image {
if (image == NULL) return;
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake(0, 0, 320, 44);
[self insertSubview:imageView atIndex:0];
[imageView release];
}
- (void) clearBackgroundImage {
NSArray *subviews = [self subviews];
for (int i=0; i<[subviews count]; i++) {
if ([[subviews objectAtIndex:i] isMemberOfClass:[UIImageView class]]) {
[[subviews objectAtIndex:i] removeFromSuperview];
}
}
}
#end
This also works well too
[self.navigationController.navigationBar.topItem setTitleView:[[UIImageView alloc]initWithImage:[UIImage imageNamed:#"YourLogo"]]];
Do it quickly using storyboard and #IBDesignable:
#IBDesignable class AttributedNavigationBar: UINavigationBar {
#IBInspectable var imageTitle: UIImage? = nil {
didSet {
guard let imageTitle = imageTitle else {
topItem?.titleView = nil
return
}
let imageView = UIImageView(image: imageTitle)
imageView.frame = CGRect(x: 0, y: 0, width: 40, height: 30)
imageView.contentMode = .scaleAspectFit
topItem?.titleView = imageView
}
}
}
Then in attributes inspector just select an image:
and wait a second for result:
So setting view is there where it should be... in storyboard.
For those who have the same error but in Xamarin Forms, the solution is to create a Renderer in iOS app and set the image like so :
[assembly: Xamarin.Forms.ExportRenderer(typeof(Xamarin.Forms.Page), typeof(MyApp.Renderers.NavigationPageRenderer))]
namespace MyApp.Renderers
{
#region using
using UIKit;
using Xamarin.Forms.Platform.iOS;
#endregion
public class NavigationPageRenderer : PageRenderer
{
public override void ViewDidLoad()
{
base.ViewDidLoad();
SetTitleImage();
}
private void SetTitleImage()
{
UIImage logoImage = UIImage.FromFile(ResourceFiles.ImageResources.LogoImageName);
UIImageView logoImageView = new UIImageView(logoImage);
if (this.NavigationController != null)
{
this.NavigationController.NavigationBar.TopItem.TitleView = logoImageView;
}
}
}
}
Hope it helps someone!
I modified the UINavigationBar+CustomImage code to properly work without leaking memory.
- (void)setBackgroundImage:(UIImage *)image
{
if (! image) return;
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
[self addSubview:imageView];
[imageView release];
}
- (void) clearBackgroundImage
{
// This runs on a separate thread, so give it it's own pool
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSArray *mySubviews = self.subviews;
// Move in reverse direction as not to upset the order of elements in the array
for (int i = [mySubviews count] - 1; i >= 0; i--)
{
if ([[mySubviews objectAtIndex:i] isMemberOfClass:[UIImageView class]])
{
[[mySubviews objectAtIndex:i] removeFromSuperview];
}
}
[pool release];
}
The following is how you would do this in (Xamarin's) MonoTouch with C#.NET
Create a UIViewConvrtoller that is in a NavigationController then call this at any time:
someNiceViewControllerYouMade.NavigationController.NavigationBar
.InsertSubview(new UIImageView
(MediaProvider.GetImage(ImageGeneral.navBar_667x44)),0);
Note: MediaProvider is just a class that fetches images.
This example allows for the view to fill the full Navigation Bar , and lets the text for the items caption appear too.
If your buttons disappear when you navigate back and forth the navigation, this fixed it for me:
NSArray *mySubviews = navigationBar.subviews;
UIImageView *iv = nil;
// Move in reverse direction as not to upset the order of elements in the array
for (int i = [mySubviews count] - 1; i >= 0; i--)
{
if ([[mySubviews objectAtIndex:i] isMemberOfClass:[UIImageView class]])
{
NSLog(#"found background at index %d",i);
iv = [mySubviews objectAtIndex:i];
[[mySubviews objectAtIndex:i] removeFromSuperview];
[navigationBar insertSubview:iv atIndex:0];
}
}
Just use
[navController.navigationBar insertSubview:myImage atIndex:0] ;
where myImage is of type UIImageView
and navController is of type UINavigationController
ios5.0 introduced a heap of features to customise the appearance of standard elements. If you didn't want to use an ImageView for the title, an alternative would be to customise the appearance of all UINavbars using a background image and a custom font/colour.
- (void) customiseMyNav
{
// Create resizable images
UIImage *portraitImage = [[UIImage imageNamed:#"nav_bar_bg_portrait"]
resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
UIImage *landscapeImage = [[UIImage imageNamed:#"nav_bar_bg_landscape"]
resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
// Set the background image
[[UINavigationBar appearance] setBackgroundImage:portraitImage forBarMetrics:UIBarMetricsDefault];
[[UINavigationBar appearance] setBackgroundImage:landscapeImage forBarMetrics:UIBarMetricsLandscapePhone];
// set the title appearance
[[UINavigationBar appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor colorWithRed:50.0/255.0 green:150.0/255.0 blue:100/255.0 alpha:1.0],
UITextAttributeTextColor,
[UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.6],
UITextAttributeTextShadowColor,
[NSValue valueWithUIOffset:UIOffsetMake(0, -1)],
UITextAttributeTextShadowOffset,
[UIFont fontWithName:#"Arial-Bold" size:0.0],
UITextAttributeFont,
nil]];
}
In MonoTouch you can use this:
this.NavigationItem.TitleView = myImageView;
Add image to naviagtionBar with SWIFT that scales to fit and clips to bounds. You can call this function inside the view controllers viewDidLoad() function.
func setupNavigationBarWithTitleImage(titleImage: UIImage) {
let imageView = UIImageView(image: titleImage)
imageView.contentMode = .ScaleAspectFit
imageView.clipsToBounds = true
navigationItem.titleView = imageView
}