I am using this code to change the background of my UINavigationBar but it is not showing in the iPhone, but working fine in the iPhone simulator.
self.navigationController.navigationBar.layer.contents = (id)[UIImage imageNamed:#"Blue Bar.png"].CGImage;
Try This
[self.navigationController.navigationBar setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"Your Image Name"]]];
check your image name may be in writing the name of image lowercase letters and upper case letters may validate.
Write a custom class which sets the background.
#implementation MyNavigationBar
- (void)drawRect:(CGRect)rect{
[[UIImage imageNamed:#"navigation.png"] drawInRect:rect];
}
#end
Related
I want to replace the current nav bar with a custom image. How my code is structured is that a tab bar controller controls a bunch of navigation controllers which contain views (tab bar controller -> nav controller -> view). I tried using this code in my app delegate
#implementation UINavigationBar (UINavigationBarCategory)
- (void)drawRect:(CGRect)rect {
UIColor *color = [UIColor blackColor];
UIImage *img = [UIImage imageNamed: #"nav.png"];
[img drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
self.tintColor = color;
}
#end
But it did not work. Any ideas why? Should I have placed it somewhere else? Thanks!
if you are using iOS 5, you can use setBackgroundImage: like this where ever you initialized the navigation controller (aNavigationController in this example):
[aNavigationController.navigationBar setBackgroundImage:[UIImage imageNamed:#"nav.png"] forBarMetrics:UIBarMetricsDefault];
I would not use a category. I would subclass UINavigationBar instead. See this: https://stackoverflow.com/a/6959354/472344
If you are targeting iOS 5 or up, use #BJH's solution instead.
I'm having some difficulty getting the transparent bits of my png image that I'm using to replace the default status bar to be rendered as transparent in iOS 4.3. At the moment they are coming up black.
Here is the code I'm using to draw my image:
#implementation UINavigationBar (BackgroundImage)
- (void)drawRect:(CGRect)rect
{
UIImage *image = nil;
switch(self.tag)
{
case HeaderBG_Logo:
image = [UIImage imageNamed: #"top_bar_logo.png"];
break;
case HeaderBG_Plain:
image = [UIImage imageNamed: #"top_bar.png"];
break;
}
if(image != nil)
{
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
}
#end
Here is a side by side comparison of the same app running in the simulator in ios4.3 and ios5 (the image has a drop shadow as its bottom border):
As an aside, the 4.3 background image doesn't seem to be rendered as tall as the 5.0 one either.
I've tried setting the UINavigationBar to opaque / setting its background color to clearColor. None of that worked. :(
Can anyone help?
I ended up using the solution from How to create UINavigationBar drop shadow to add a shadow to the UINavigationBar instead.
Just an hint, for iOS 5 you could use the new appreance property to set the background image:
[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:#"top_bar.png"] forBarMetrics:UIBarMetricsDefault];
This will set the image for all UINavigationBars in the app.
I am not sure to understand if you are concerned by the status bar or by the navigationBar. According to you question it seems you are more concerned by the Navigation so here is a sample code that worked for me to add a background image for iOS5 and iOS4. It works with transparent png.
Just add this in the loadView method of your viewController:
#define kBackgroundImageTag 42
UINavigationBar *theNavigationBar = self.navigationController.navigationBar;
UIImage *myBackgroundImage = [UIImage imageNamed:#"myImage.png"];
if([theNavigationBar respondsToSelector:#selector(setBackgroundImage:forBarMetrics:)]) //iOS5 stuff
{
[theNavigationBar setBackgroundImage:myBackgroundImage forBarMetrics: UIBarMetricsDefault];
}
else if(![theNavigationBar viewWithTag:kBackgroundImageTag]) //iOS 4 stuff
{
UIImageView *imageView = [[UIImageView alloc] initWithImage:myBackgroundImage];
imageView.tag = kBackgroundImageTag;
[theNavigationBar insertSubview:imageView atIndex:0];
}
Hope it helps !
I have read this and change UINavigationBar's background:
#implementation UINavigationBar (CustomImage)
- (void)drawRect:(CGRect)rect {
UIImage *image = [UIImage imageNamed: #"top-with-logo.png"];
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
#end
you see, I add a image named top-with-logo.png, and I want to change the background view by adding an image named top-without-logo.png. But the code above will change the background forever and i cannont change any more. Do you know how?
Thank you very much.
I'm not sure I understand what you mean, but you can place a Boolean ivar on your app's delegate. then in the function you load top-with-logo.png if it's true/false and load top-without-logo.png if it's the other value. then, when you want to change the logo, just change the Boolean's value and call setNeedsDisplay on the navigationBar.
if you use xib files, you can also subclass UINavigationBar, and instead of using a catagory you override the drawRect function and place the variable as an instance variable as a subclass, I believe it is cleaner, but you can only set that up in Interface builder ( otherwise there's no way to tell a UINavigationController to use a different class for the navigationBar property )
You can use,
UINavigationBar *navigationBar = self.navigationController.navigationBar;
UIImage *image = [UIImage imageNamed: #"NavBar-Wood.png"];
[navigationBar setBackgroundImage:image forBarMetrics: UIBarMetricsDefault];
self.navigationController.navigationBar.tintColor = [UIColor brownColor];
Basically I want a custom UINavigationBar. I don't want it to be "translucent" or anything, like the pictures app.
I basically want to completely remove it, but I still want to be able to add back buttons and such when navigation controllers are pushed, and I want the views (EG: UITableViewController) to be pushed down below it.
Like this:
Any ideas how to achieve this at all?
Thanks
#implementation UINavigationBar (background)
- (void)drawRect:(CGRect)rect {
UIImage *image = [UIImage imageNamed:#"navigationbar.png"];
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
#end
basically, its not completely see through - its a visual lie. The only way to do it realistically is to override UINavigationBar's drawRect: method, as shown above.
To see through the UINavigationBar, if you choose to have one, just:
self.navigationController.navigationBar.translucent=YES;
You'll have to change the tint/color to match the background if you want it to appear like the image you posted.
At the beginning of your AppDelegate subclass UINavigationBar as below:
#interface CustomNavBar : UINavigationBar
#end
#implementation CustomNavBar
- (void)drawRect:(CGRect)rect {
UIImage *image = [UIImage imageNamed:#"bar.png"];
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
and then in the AppDelegate do this magic:
//Set custom NavigationBar
[self.navController setValue:[[CustomNavBar alloc]init] forKeyPath:#"navigationBar"];
//Set tint to match bar.png
self.navController.navigationBar.tintColor = [UIColor colorWithRed:0.93 green:0.43 blue:0 alpha:1];
//Set font for NavigationBar
[self.navController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont fontWithName:#"Comfortaa-Bold" size:20], UITextAttributeFont, nil]];
That should give you a lot more control over UINavigationController look & feel.
Hard to tell, could be the UINavigationBar is there and color matches the UIView background or, there is no UINavigationBar, just a view with custom buttons and UILabel on top. Pick an approach and code it, or ask the question again with more specifics.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How to add background image on iphone Navigation bar?
I am looking for a way to have a custom navigation bar and need to have a custom navigation bar background to achieve this. I was looking around for how to do this, but could not find a solution. If anyone has the solution, help is much appreciated.
Since iOS5, you can easily set a custom background, with the method setBackgroundImage:forBarMetrics:
But you must check if the user's phone has the right OS.
if ([self.navigationController.navigationBar respondsToSelector:#selector(setBackgroundImage:forBarMetrics:)])
{
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:#"texture.png"]
forBarMetrics:UIBarMetricsDefault];
}
This is a nicer solution, cause it's in the doc.
(supplemental to Andrew Johnson's response)
The linked Apple.com post includes 3 or 4 different solutions, most of which only "half" work. I think the most elegant/effective of them is this one:
#implementation UINavigationBar (CustomImage)
- (void)drawRect:(CGRect)rect {
UIImage *image = [UIImage imageNamed: #"NavigationBar.png"];
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
#end
HOWEVER ... it's not good-practice ObjC to od that as a category (should be an override), and it has some problems of its own.
So, a more general and powerful solution is here:
http://samsoff.es/posts/customize-uikit-with-method-swizzling
You can just add a subview (a UIImageView) to the navaigationBar, which is just a UIView subclass.
UINavigationBar nb = [[UINavigationBar alloc]init];
[nb addSubview: foo];
[nb release];
Here's a forum post that describes how to wrap this up into a category: http://discussions.apple.com/thread.jspa?threadID=1649012&tstart=0
Copy this into viewDidLoad. It will check for iOS 5 and use the preferred method, otherwise it will add a subview to the navBar for iOS versions < 5.0. This will work provided that your custom background image has no transparencies.
float version = [[[UIDevice currentDevice] systemVersion] floatValue];
NSLog(#"%f",version);
UIImage *backgroundImage = [UIImage imageNamed:#"myBackgroundImage.png"];
if (version >= 5.0) {
[self.navigationController.navigationBar setBackgroundImage:backgroundImage forBarMetrics:UIBarMetricsDefault];
}
else
{
[self.navigationController.navigationBar insertSubview:[[[UIImageView alloc] initWithImage:backgroundImage] autorelease] atIndex:1];
}