I have a tab bar with 3 buttons, each of which loads a different controller and hence a different view.
I would like to place a UIView right behind my tab bar so that it is visible on all 3 different sub-controllers.
How can I achieve that?
It's pretty easy (this is using a storyboard) :
• Create a subclass of UITabBarController (I'll call it "TabViewController").
• In your storyboard, select your UITabBarViewController, and give it the class `TabViewController (on the right bar, 3rd section, custom class).
• In your TabViewController.m file, use this code :
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
UIView *theView = [[UIView alloc] initWithFrame:CGRectMake(50, 50, 50, 50)];
theView.backgroundColor = [UIColor redColor];
[self.view addSubview:theView];
[self.view bringSubviewToFront:self.tabBar];
}
You can do whatever you want with theView before you add it to self.view, here I just create a 50x50 red square at the position (50, 50). The view will stay on top of everything else !
Run & have fun !
add that green banner on Window in appDelegate.
[self.window addSubview:greenBannerView];
Related
I am new to developing for iOS, but I am completely stumped with this.
Steps:
In Xcode, create a new tabbed application for iPhone.
Go into first subview and drag a Navigation Bar to the view.
Go into viewDidLoad and add this (assuming you have dropped logo.png into the project structure):
self.navigationItem.titleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"logo.png"]];
Render the view - it does not work. No custom image replaces the default "Title" text.
I don't understand. Why does this not work? What do I have to do to make it work? Is there something fundamentally different I need to be doing or a concept I am not grasping fully here?
UPDATE
I have figured out that the code above works. You just need to embed your view inside a navigation controller. Click on the first tabbed view, then do Editor > Embed In > Navigation Controller. The code will then work, and you can continue moving forward. Just embed each tab in a navigation controller using the method above and you should be good to go!
The code you have will work if your controller is embedded in a navigation controller, but if you add a navigation bar manually, you need to make an IBOutlet to it (bar in my example), and get its navigation item,
- (void)viewDidLoad {
[super viewDidLoad];
UINavigationItem *item = self.bar.items[0];
item.titleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"logo.png"]];
}
May be the problem you are facing is because of not setting the frame. I face similar problem sometimes. Try this:
UIImageView *customTitleView = [[UIImageView alloc]initWithFrame:CGRectMake((320-210)/2, 0, 210, 50)];
customTitleView.backgroundColor = [UIColor redColor];
self.navigationItem.titleView = customTitleView;
Hope this helps. :)
I have a custom UIViewController which create a view containing an action bar at the top (view with 4 buttons), a tableview and then another view below the tableview. Layout is done all in code and is not using auto layout.
Everything works perfectly on various device with iOS 7.0 and 7.0.2, but in the simulator, the root view of the controller get anchored at the top right corner of the screen (0,0) instead of below the navigation bar.
I'm going to force the relay out in the viewDidAppear: method, but this seem like a hack...
Thanks for any insights
Edit: added an image. You can see the UIView highlighted. As ManicMonkOnMac mentioned, the UIView is under the toolbar (but this only happens in the simulator, on the device, the view lines up fine)
In the loadView method on the controller, i set the frame when creating the view:
- (void)loadView
{
// Our parent view controller will resize us appropriately. The size set
// here is a convenience for initial view layout.
self.view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 320)];
self.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
}
But this frame is later changed. Not by my code, though, but by UIkit code)
Edit2: addded loadView method body
EDIT: After going through session 201 of WWDC 2013, I think I have the solution.
in iOS 7 there is a property that you can set on your view controllers to specify whether you want the views to be overlapped by navigation bar.
viewController.edgesForExtendedLayout = UIRectEdgeNone;//UIRectEdgeAll specifies that nav bars should overlap the view.
Unlike iOS 6, navigation bars are placed over the views in iOS 7.
Use the frame size that excludes the navigation bar.
code:
CGRect frame = CGRectMake(self.view.frame.origin.x,self.view.frame.origin.y+self.navigationController.navigationBar.frame.size.height,self.view.frame.size.width,self.view.frame.size.height);
CustomView *view = [[CustomView alloc] initWithFrame:frame];
[self.view addSubview: view];
I have a UITabBarController and I want to add a UIView as a subview but I want that view to cover the whole screen including the tabs on the bottom. All attempts I have done result in the view cover everything except the tabs on the bottom.
Not sure what you have tried but, if you are trying to add the view from a UIViewController that is inside the UITabBarController then you should use:
UIView *coverView = [[UIView alloc] initWithFrame:CGRectMake(0,
0,
self.tabBarController.view.frame.size.width,
self.tabBarController.view.frame.size.height)];
[self.tabBarController.view addSubview:coverView];
//and maybe [self.tabBarController.view bringSubviewToFront:coverView];
I have a subview in my navigation bar. I try to add it by this way:
UIView *customView =
[[UIView alloc] initWithFrame:
CGRectMake(0, 0, image.size.width + label.frame.size.width, 44)];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[customView addSubview:imageView];
[customView addSubview:label];
[self.navigationController.navigationBar addSubview:customView];
However, when I try to push the navigation bar, the customView stays in the place, not animating following the sliding navigation bar. How can I achieve the animated subview? Is it even possible? Thanks!
you should not add subview in that way
you have tospecify your view location in the left , right or title view
self.navigationItem.titleView = YOURVIEW;
or choose another location left or right items in this way the the title view will added to the current view if you want to remove it just set it to nil in the place you want and reload it subviews again,
self.navigationItem.titleView = nil;
As you are using
[self.navigationController.navigationBar addSubview:customView];
that means the navigation bar you have create is in App delegate and is common for all the viewControllers in your project,that is why once you add a view on to it you see it on every view you have. Remove your sub-view in
-(void)viewWillDisappear:(BOOL)animated{
[Your subview remove fromSuperView];
[super viewWillDisappear:YES];
}
and add that subview in
-(void)viewWillAppear:(BOOL)animated{
[self.navigationController.navigationBar addSubview:Your subview];
[super viewWillAppear:YES];
}
this will add the subview in that particular view only and remove it as soon as that view is popped or pushed.The code given is not correct to the syntax please give a check on that.
I'm writing an iPhone app with a table inside a navigation controller. When the user clicks one of the cells in the main screen a UIView on top of the incoming view controller is created (it's like a toolbar).
self.toolbar = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 45)];
toolbar.backgroundColor = [UIColor colorWithRed:0.8823 green:0.8823 blue:0.8823 alpha:1.0];
[self.navigationController.view addSubview:toolbar];
The problem is that the view appears before the transition to the new view controller is complete and the effect is pretty weird. I suppose this is due to the fact I add the view to the navigationController,but I need to do this otherwise the bar would scroll together with the table and instead I want it to be fixed.
Any suggestion?
I've found a possible solution: add the toolbar as TableHeaderView and follow iOS: Add UIView to UITableView
Any other better solution is more than welcome