For an iphone project with an "unique" design (with which i am not happy at all) I need to draw a custom view which partially overlaps the navigation bar of a controller in a UINavigationController. Target is iphone/ios 6 with a fixed device orientation (portrait).
My currents solution is to disable the navigation bar programatically via self.navigationController.navigationBar.hidden = YES; in viewDidLoad of my controller and to draw a "fake" navigation bar and paint over this.
This leads to the problem that the status bar color remains black (since there is no real navigation bar visible).
Ios 6 status bar color is discussed here: Status bar color in iOS 6?
I already tried to use [self.view insertSubview:OVERLAPVIEW aboveSubView:self.navigationController.navigationBar] but it did not work and OVERLAPVIEW was drawn beneath the navigation bar.
Is there another way to overlap the navigation bar with another view (z-wise)?
Or is there a way to change the status bar color when no navigation bar is shown (unfortunately in addition to this the view with the overlap is the main view of the app and the first screen visible to the user)
Full disclosure: I am an ios noob and stack overflow lurker - this is my first question on stack overflow, please help me to clarify my question and improve my stack overflow skills if necessary.
Use
[self.navigationController.view addSubview:OVERLAPVIEW];
instead of
[self.view insertSubview:OVERLAPVIEW aboveSubView:self.navigationController.navigationBar];
You can adjust the frame of your view according to make navigation bar partially visible.
I solved this issue by hiding the Navigation bar with
self.navigationController.navigationBar.hidden = YES;
and by adding a navigation bar to my view. Everything added after this new navigation bar will to overlap it (you could use index [parentView.subviews objectAtIndex:0]; as well).
The color of the status bar changes as needed.
In the case of the splash screen i do exactly the same and overlap the navigation bar with the fullscreen splash image.
-(void)viewDidLoad{
[super viewDidLoad];
UINavigationBar * navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 49)];
UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:#"SPLASH"];
[navigationBar pushNavigationItem:item animated:NO];
[self.view addSubview:navigationBar];
CGRect frame = [[UIScreen mainScreen] bounds];
frame.origin.y -= 20;
UIImageView *splashImage = [[UIImageView alloc] initWithFrame:frame];
splashImage.image = [UIImage imageNamed:#"splash"];
[self.view addSubview:splashImage];
}
It seems that this answer solves my issue
Add UIView Above All Other Views, Including StatusBar
Note: at the moment i am not going down this road and I will accept this answer once I tried it (I postponed solving this problem at the moment and it might take a while)
Related
This question already has an answer here:
UITabBar fully transparent
(1 answer)
Closed 9 years ago.
I have spent the last few hours trying to get the TabBar in a UITabBarController fully transparent (clear background). I use a custom subclass of the UITabBarController and I managed to change the tintColor, the alpha, but the background color definitely remains the one defined in IB.
Thanks for your help, I'm getting crazy...
Here is one way to accomplish that.
CGRect frame = CGRectMake(0.0, 0.0, 320, 48);//Setting a Frame.
myTabView = [[UIView alloc] initWithFrame:frame];//Making Tab View
// not supported on iOS4
UITabBar *tabBarr = [self.tabBar tabBar];
if ([tabBarr respondsToSelector:#selector(setBackgroundImage:)])
{
// set it just for this instance
[tabBarr setBackgroundImage:[UIImage imageNamed:#"hot-1.png"]];
// set for all
// [[UITabBar appearance] setBackgroundImage: ...
}
else
{
// ios 4 code here
//[tabBarr setBackgroundColor:c];
}
//[myTabView setBackgroundColor:c];//Setting Color Of TaBar.
[myTabView setAlpha:0.8];//Setting Alpha of TabView.
[[self.tabBar tabBar] insertSubview:myTabView atIndex:0];//Inserting Tab As SubView.
And here is a link to a tutorial I found very useful in changing the tab bar's background. You can play around with the code and costomize it to your liking.
http://ios-blog.co.uk/tutorials/how-to-customize-the-tab-bar-using-ios-5-appearance-api/
Edit:
As far as setting the background color of tabbar to transparent or clear color, you have two ways. One is the image which I explained and you didn't like. The other one is to set the background of tabbar in its supper view. Something along the following line.
tabBar.superview.backgroundColor = [UIColor clearColor];
This way you reach behind the tabbar and change that black background to whatever you want.
Edit 1:
sorry for delay in adding the solution for ios 7. below is the method you need to change the background color of the tabbar in ios 7.
just add the following line of code inside your ViewDidLoad method and it will do the magic.
[self.tabBarController.tabBar setBackgroundColor:[UIColor greenColor]];
hope this helps.:)
CGRect cgRect1 = [[UIScreen mainScreen] applicationFrame];
UISearchBar *mySearchBar = [[UISearchBar alloc]
initWithFrame:CGRectMake(0, 0, cgRect.size.width, 40)];
mySearchBar.autoresizingMask =
UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight ;
UITableView *myTableView = [[UITableView alloc]
initWithFrame:CGRectMake(0, 40, cgRect.size.width, cgRect.size.height-40)];
myTableView.autoresizingMask =
UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
[self.view addSubview:mySearchBar];
[self.view addSubview:myTableView];
In the earlier versions it is working correctly. The search bar is appearing below the statusbar and navigation bar. The tableview is appearing below the search bar
But when I run this on Xcode 5 sdk iOS 7, the search bar is not visible (I think its placed under the status bar and navigation bar) , and also the navigation bar is appearing over the table view.
Will it be fixed with iOS 7 stable release ?
Or is it the problem of my coding ?
Or should we handle it by adding the y (y = statubar height + nav bar height) value for iOS 7 ?
I recently downloaded Xcode 5 DP to test my apps in iOS 7. The first thing I noticed and confirmed is that my view's bounds is not always resized to account for the status bar and navigation bar.
In viewDidLayoutSubviews, I print the view's bounds:
{{0, 0}, {320, 568}}
This results in my content appearing below the navigation bar and status bar.
I know I could account for the height myself by getting the main screen's height, subtracting the status bar's height and navigation bar's height, but that seems like unnecessary extra work.
Has anyone else experienced this issue?
UPDATE:
I've found a solution for this specific problem. Set the navigation bar's translucent property to NO:
self.navigationController.navigationBar.translucent = NO;
This will fix the view from being framed underneath the navigation bar and status bar.
However, I have not found a fix for the case when you want the navigation bar to be translucent. For instance, viewing a photo full screen, I wish to have the navigation bar translucent, and the view to be framed underneath it. That works, but when I toggle showing/hiding the navigation bar, I've experienced even stranger results. The first subview (a UIScrollView) gets its bounds y origin changed every time.
That’s not entirely true. There has been a new property introduced in iOS 7 that lets you adjust the layout behavior as in previous versions of iOS. Place this piece of code in your view controller, and you should be good to go! The space your navigation bar takes up should be accounted for automatically
if ([self respondsToSelector:#selector(edgesForExtendedLayout)])
self.edgesForExtendedLayout = UIRectEdgeNone;
You need add the above in your -(void)viewDidLoad method.
Note: You should be using the latest GM release of iOS 7 and Xcode 5 now since the API has changed from beta versions.
If you are working in Storyboard (which I strongly recommend!) this is the solution:
You can disable "Extend Edges" of your ViewController in storyboard. You have to do this for each viewController. You can disable extended edges by clicking the viewController icon in stortyboard (besides the productOwner beneath the view itself) and then selecting the attributes inspector (Like the images shows).
This will also set the alignment lines like iOS 6.
Another great tool in xCode 5 is "Preview": click on the butler Button (assistant editor) and select Preview. there you can select iOS 6 and see how your storyboard design will look like on iOS 6.
Its just great:D
[Update]
Be careful: disabling "Extend Edges" might result in a black glow on the navigation bar when the app enters background on iOS7. the glow will also be visible on the multitasking view (double press on home button). this can be solved by setting the background color of the navigation's bar view to white.
[self.navigationController.view setBackgroundColor:[UIColor whiteColor]];
As the OP says, there is a simple solution to this which is to set the navigation bar to be opaque. Rather than doing this in code, simply untick "Translucent" for your root navigation bar:
self.edgesForExtendedLayout=UIRectEdgeNone;
It works on iOS 7 simulator(Xcode 5 DP5)
these answers were all helpful, especially MQoder's, but for me i also had to set the default top bar to "opaque black navigation".
#One Man Crew's answer is correct, but:
I would recommend to use this code to avoid errors when running the app on older versions :
#if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_6_1
if ([self respondsToSelector:#selector(edgesForExtendedLayout)])
self.edgesForExtendedLayout = UIRectEdgeNone;
#endif
self.edgesForExtendedLayout = UIRectEdgeNone;
And you need to do this on AppDelegate#application:didFinishLaunchingWithOptions:
self.window.backgroundColor = [UIColor whiteColor];
Otherwise Navigation Bar's background color will changed to gray. Because the transparent Navigation Bar overlaps window.
If you want to keep the transparency when the user scrolls your table view, you can set the contentInset of it:
CGFloat topLayoutGuide = self.topLayoutGuide.length + self.tabBarController.navigationController.navigationBar.frame.size.height;
self.tableView.contentInset = UIEdgeInsetsMake(topLayoutGuide, 0, 0, 0);
One solution is to use Navigation Controller. This automatically solve the issue.
Also use Xcode 5 instead of Xcode Preview versions since they are beta ones.
Probably a bit of a newbie question, but .... I am writing an iPhone app which uses UITabBarController.
In Interface Builder I've setup the tab bar in MainWindow.xib. I have 4 tabs, and each one is set to load the xib for the appropriate UIViewController subclass. I have created the views in the xib files for each UIViewController subclass in Interface Builder.
All is working well in that I can tap each tab and it shows the view for the correct UIViewController
But what I really want is for the view for one of the UIViewController subclasses to have a semi-transparent border of approx 30px on all 4 edges, so that it shows the edges of the view behind, kind of greyed out.
IE. the first tab is the main application, and that takes up the whole screen (minus the status and tab bar areas).Tab 2 is to save, and I want it to look like a small modal window over the top of the main app.
(If I were doing this as a html web app, the terminology and technology I'd be using would be a jQuery overlay)
Does this make sense?
I've tried playing with presentModalViewController but this makes it worse in that it takes up the entire screen including the status and tab bar areas.
Any help or pointers very much appreciated
Cheers
Nathan
Your UIViewController cannot be transparent to the view below it because the iphone may unload the view below it that is not currently being shown (to save memory).
The best solution I have used is to take a picture of the current view before you push your new view controller and then use that as the background image (fake the transparency). Here's how I implemented this:
NewViewController *newView = [[NewViewController alloc] init];
shareVC.imageBackground = [Utilities getScreenshot:self.view];
[self presentModalViewController:newView animated:YES];
[newView release];
then on your newViewController do this (on viewDidLoad, viewWillAppear, etc):
[imageView setImage:imageBackground];
and here's the screenshot function
+(UIImage *)getScreenshot:(UIView *)_view {
//take a screenshow of the parent view so we can add it as a background to the modal view
if ([[UIScreen mainScreen] respondsToSelector:#selector(scale)])
UIGraphicsBeginImageContextWithOptions(_view.window.bounds.size, NO, [UIScreen mainScreen].scale);
else
UIGraphicsBeginImageContext(_view.window.bounds.size);
[_view.window.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
You then need to setup your new view with a UIImageView as the background and pick the right Alpha value for that imageView to make it appear like it's transparent.
So I have an iPhone application running that is controlled at the highest level by a UITabBarController. It is the default black Tab Bar at the bottom that you see in many iPhone apps. I am kind of new to iPhone SDK programming, and I know I have seen other apps that have their own background color for the Tab Bar at the bottom. I am not sure if they are using this tab bar as I am, as the main controller for their app, but the question applies to this:
How do I change the background color of the main UITabBarController in my application? I wanted to change it to a dark shade of green similar to the colors of the navigation bars and labels I have placed in my app. I find it weird how Apple makes it really easy to change the color of Navigation Bars (not controllers), and other things, but when it comes to controllers (in this case a Tab Bar Controller), I cannot find a single way to implement this cleanly and efficiently.
You can do something like this.
- (void)viewDidLoad {
[super viewDidLoad];
CGRect frame = CGRectMake(0.0, 0, self.view.bounds.size.width, 48);
UIView *v = [[UIView alloc] initWithFrame:frame];
[v setBackgroundColor:[[UIColor alloc] initWithRed:1.0
green:0.0
blue:0.0
alpha:0.1]];
[tabBar1 insertSubview:v atIndex:0];
[v release];
}
I am using a navigation controller, and I have the style set to :
navController.navigationBar.barStyle = UIBarStyleBlackTranslucent;
But when I run my program, the navigation controller looks like it is on top of a white background, not my background. When I push a controller, left or right, all my view, the current one, shifts to the top exactly the size of the navigation bar. And it is there where I can see my background through the navigation controller bar. Any ideas? When my barStyle is set to opaque, everything looks fine. I was thinking on setting my view frame a negative 'y' value, but I think there should a more elegant way.
I believe the UINavigationController assumes that your controller view frames don't include the area beneath the navigation bar.
UIBarStyleBlackTranslucent is more often used for UIToolbar, so Apple probably didn't make it easy to use it nicely with UINavigationBar. You'll probably need to abandon the UINavigationController, or start hacking the frames (careful with rotations), if you want to reliably render under the bar area.
Also, if your intention is to hide the navigation bar after a few seconds, you'll have a much easier time if you make it fade out (like the Photos app) instead of trying to slide it up (like Mobile Safari). Trust me on that one... that took me a lot of time to learn the hard way.
Simply use a transparent background image, and translucent = YES to allow the content to flow below the bar. Works on iOS 5 / 6. Add in viewDidLoad.
self.navigationController.navigationBar.translucent = YES;
UIImage * backgroundImage = [UIImage imageNamed:#"spacer.gif"];
[self.navigationController.navigationBar setBackgroundImage:(UIImage *)backgroundImage forBarMetrics:UIBarMetricsDefault];
I attached the spacer.gif image here, a single 1px x 1px transparent image.
self.navigationController.navigationBar.tintColor = [UIColor colorWithRed:0.169 green:0.373 blue:0.192 alpha:0.9];
self.navigationController.navigationBar.translucent = YES;
Note:
Don't use self.navigationBarStyle and self.navigationBarTintColor to change.
Add the last two statements to your viewDidLoad.
I ran into this same problem (in 3.1.3) and while you can't set the bar style after the navigationBar has already been setup you CAN set the tintColor and translucent values whenever you like:
self.navigationController.navigationBar.tintColor = [UIColor blackColor];
self.navigationController.navigationBar.translucent = YES;
Will create the 'blackTranslucent' bar, I change the navigationBar look when I push certain view controllers onto the stack.
I had the same problem, and I solved it by making the background of the root view the same as my view. The white area behind the navigation bar turned out to be the root view.
The navigation controller offsets the coordinate sytem of all it's subviews so they draw below the navigation bar.
Extend your view's frame into the negative y domain for it to draw under the navigation bar.
You need to set the barstyle in your info.plist file for it offset everything correctly.
However, I haven't tried it since the 2.1 f/w was released, but when I tried this in 2.0 I found that the setting was lost after a rotation from portrait to landscape.
try to use this, may be it will helpful.
_topToolBar.barStyle = UIBarStyleBlackTranslucent;
_topToolBar.alpha = 0.3;
I had a same problem.I solved!
ImageViewExtendController *detailImageController = [[ImageViewExtendController alloc] init];
[detailImageController loadImage:url];
[self.navigationController pushViewController:detailImageController animated:YES];
If you set your nav controller's navigationBar to transparent in your App delegate early enough (It worked for me before adding the nav controller to the window), it will automatically shift your view up underneath the navigation bar.
Unfortunately it does not also shift your view underneath the status bar. Sad, it looks like you need to implement your own version of UINavigationController. Luckily, it's not too bad as UINavigationBar is pretty reusable.
Try this:
self.tabBarController.tabBar.superview.backgroundColor = [UIColor blackColor];
Change the Extend Edges options in child viewControllers
As for example, in xcode editor, go to your first viewcontroller child and unset the options:
Extend Edges;
Under Top Bars;
Under Bottom Bars;
Under Opaque Bars;
This way your child ViewController will not layout starting below the status bar of the navigation controller, neither the tabbar or the toolbars
hope it may help anyone