I am using a UIToolbar for the controls at the top of the screen (There is no navigation controller) The toolbar has the look I want, however the status bar is entirely clear. I cannot seem to mimic the blur that the UIToolbar has in it's transparency. Has anyone come across a solution to this that does not involve using a navigation controller?
In Order to achieve this you need to implement methods in the UIBarPositioningDelegate protocol:
https://developer.apple.com/library/ios/documentation/uikit/reference/UIBarPositioningDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intf/UIBarPositioningDelegate
Here is the code:
#interface ViewController : UIViewController <UIToolbarDelegate>
#property (nonatomic, weak) IBOutlet UIToolbar * toolbar;
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
//we become the delegate
self.toolbar.delegate = self;
}
-(UIBarPosition)positionForBar:(id<UIBarPositioning>)bar{
//this tells our bar to extend its background to the top.
return UIBarPositionTopAttached;
}
#end
Related
I'm new on this, and I would like to get some advice because I don't know what I'm doing wrong.
I want to make an app in xcode, with a UIView with some items, and when you do something, another UIView (smaller than the first) pops up above the first UIView. The popup UIView would be a customized class.
I have started with the UIViewController template and the initial UIView, and I have linked all the items in the .storyboard, and it works. But when I create my own UIView class (from objective-C class), put the second UIView over the first in the storyboard and link it to my class, something goes wrong.
The UIView appears, but when I try to set it to hidden, it doesn't answer. It's like it's not receiving the messages, so I think I don't link it well programmatically and just appears because of the storyboard.
I don't know if I have to create another UIViewController instead of the UIView, or if this is the correct path.
Can anybody explain me a little, or just write a little code snippet with the instantiation of the second view and adding it?
Lots of thanks!!
(I paste some code, of the declaration in .h and instantiation in .m)
#import <UIKit/UIKit.h>
#import "EditView.h"
#interface ReleaseViewController : UIViewController <UIWebViewDelegate, UISearchBarDelegate> {
IBOutlet UIWebView *web;
IBOutlet UISearchBar *search;
IBOutlet EditView *evHack;
}
#property (nonatomic, retain) IBOutlet UIWebView *web;
#property (nonatomic, retain) IBOutlet UISearchBar *search;
#property (nonatomic, retain) IBOutlet EditView *evHack;
#end
- (void)viewDidLoad
{
[super viewDidLoad];
search.delegate = self;
web.delegate = self;
evHack = [evHack initWithFrame:CGRectMake(0, 44, 320, 377)];
[evHack setHidden:YES];
}
EditView Class (I still have nothing):
#import <UIKit/UIKit.h>
#interface EditView : UIView
#end
#import "EditView.h"
#implementation EditView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
NSLog(#"View created");
}
return self;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
}
*/
#end
initWithFrame only works when you alloc/init an app. If its already initialized, in this case by the storyboard, just set its frame:
evHack.frame = CGRectMake(0,44, 320, 377);
I don't know what it looks like in IB, But setting its frame in code may be redundant if you set it in IB too. To check whether evHack is hooked up right, NSLog evHack in viewDidLoad. If you get nil back, it's not hooked up right.
I have a Navigation Controller with two Views. The First View is a ViewController with a TableView and the Second View is UIView with some UILabels and a UIWebView. When selecting a cell from the TableView, the Navigation Controller pushes to the Second View.
I've added a UIToolBar to Navigation Controller and some buttons.
My problem is when the Navigation Controller pushes to the Second View (UIView), my UIToolBar appears but without the buttons.
I would like to either show different buttons or remove the UIToolBar from the Second View.
I think I need to do something within the AppDelegate, I'm just not sure what and how.
Here is how my XIBS look:
MainWindow
- App Delegate
- Window
- Navigation Controller
-- Navigation Bar
-- ToolBar
-- View Controller
--- Bar Button Item
--- Navigation Item
---- Bar Back Item
ViewController
-TableView
DetailView
-View
--Web View
--Label
--Label
Code:
AppDelgate.h
#interface AppDelegate : UIResponder <UIApplicationDelegate>
{
UIWindow *window;
UINavigationController *navigationController;
UIToolbar *toolBar;
}
#property (nonatomic, strong) IBOutlet UIWindow *window;
#property (nonatomic, strong) IBOutlet UINavigationController *navigationController;
#property (nonatomic, strong) IBOutlet UIToolbar *toolBar;
#end
AppDelegate.m
#implementation AppDelegate
#synthesize window;
#synthesize navigationController;
#synthesize toolBar;
- (void)applicationDidFinishLaunching:(UIApplication *)application {
// Override point for customization after app launch
[window addSubview:[navigationController view]];
[window makeKeyAndVisible];
}
- (void)applicationWillTerminate:(UIApplication *)application {
// Save data if appropriate
}
#end
Any help would be appreciated. Thanks
You have to specify the toolBarItems for each View you load onto the stack. So,
-(void)viewDidLoad{
[self setToolbarItems:myArrayOfItems];
//do this in every view controller
//other code.
}
I cant get you clearly. i suggest this with the assumption. If you want add button in the top bar of the nextview means, you dont use toolbar for that. You can add button in the navigation bar itself.
you can add the button using addsubview method.
Initialize UIbutton using initwithframe. then add that as a subview of navigation controller.
[navigationcont addsubview:button];
I've loaded a UIView (FirstView.m) with a separate XIB (SecondView.xib), but the buttons in that XIB crash the app. The code for the buttons (IBOutlet & IBAction) are in SecondView.m.
Do I need to point the code from SecondView.m to FirstView.m? I tried using #import and #class... but was unsuccessful.
The code I'm using is completely valid... I'm pretty sure the issue has something to do with the XIB being loaded into the UIView... and then possibly losing its connection to the implementation file. Thoughts?
Thanks in advance!
FirstView.h
#import <UIKit/UIKit.h>
#interface FirstView : UIViewController {
IBOutlet UIView *SecondViewPopUP;
IBOutlet UIButton *openBTN;
}
#property (nonatomic, retain) UIView *SecondViewPopUP;
#property (nonatomic, retain) IBOutlet UIButton *openBTN;
-(IBAction)showPopUp:(id)sender;
FirstView.m
#synthesize SecondViewPopUP;
#synthesize openBTN
- (void)viewDidLoad {
SecondViewPopUP.alpha = 0;
// Add IncidentsViewController to view
SecondView *SecondV=[[SecondView alloc] init];
SecondV.view.frame = CGRectMake(0, 0, 262, 269);
SecondV.view.clipsToBounds = YES;
[SecondViewPopUP addSubview:SecondV.view];
SecondViewPopUP.frame = CGRectMake(0, 76, 262, 269);
[SecondV release];
}
-(IBAction)showPopUp:(id)sender {
NSLog(#"Stats Button was pressed");
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.4];
SecondViewPopUP.alpha = 1;
[UIView commitAnimations];
}
SecondView.h
#import <UIKit/UIKit.h>
#interface ShareViewController : UIViewController {
IBOutlet UIButton *share_facebook;
IBOutlet UIButton *share_twitter;
}
#property (nonatomic, retain) IBOutlet UIButton *share_facebook;
#property (nonatomic, retain) IBOutlet UIButton *share_twitter;
-(IBAction)shareOnFB:(id)sender;
-(IBAction)shareOnTwitter:(id)sender;
SecondView.m
#synthesize share_twitter, share_facebook;
- (void)viewDidLoad {
[super viewDidLoad];
}
-(IBAction)shareOnFB:(id)sender {
NSLog(#"Shared on FB");
}
-(IBAction)shareOnTwitter:(id)sender {
NSLog(#"Shared on Twitter");
}
First of all FirstView (and presumably SecondView) is a UIViewController not a UIView so naming it "FirstViewController" would be much clearer. Views and view controllers are very different things.
Secondly you are adding a UIViewController's view as a subview of another view on the line "[SecondViewPopUP addSubview:SecondV.view];" That's not how UIViewControllers are expected to be used and the UIViewController programming guide recommends against it for good reason.
Each custom view controller object you create is responsible for managing all of the views in a single view hierarchy. In iPhone applications, the views in a view hierarchy traditionally cover the entire screen, but in iPad applications they may cover only a portion of the screen. The one-to-one correspondence between a view controller and the views in its view hierarchy is the key design consideration. You should not use multiple custom view controllers to manage different portions of the same view hierarchy. Similarly, you should not use a single custom view controller object to manage multiple screens worth of content.
Finally if you were to post the error listed when your app crashes we would probably see that you are attempting to send -shareOnFB: or -shareOnTwitter: messages to an instance of "FirstView" which does not implement them because your nib bindings are not configured appropriately ie you set the File's Owner of the nib to be "SecondView" and then loaded it with an instance of "FirstView" as its owner. Impossible to say for sure without more data.
Noobie so bear with me.
I've have been following the O'Rielyy Learning iPhone Programming and various threads on here to build my first iPhone App. So far so good, but the final stumbling block at the projects end is getting the App to autorotate (the beta using only uiwebviews was rejected for not auto-rotating)
I have the mail App delegate, which adds a UITabBarController
// myNewsUKDelegate.h
#interface myNewsUKDelegate : NSObject <UIApplicationDelegate, UITabBarControllerDelegate> {
UIWindow *window;
UITabBarController *tabBarController;
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) IBOutlet UITabBarController *tabBarController;
#end
// myNewsUKDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Add the tab bar controller's view to the window and display.
[self.window addSubview:tabBarController.view];
[self.window makeKeyAndVisible];
return YES;
}
There is are .h and .m files for tabBarController - I added all the UINavigationControllers in IB, which in turn add a UITableView
See image at http://flatearth.co.uk/nib.png (too noob to post images in questions!)
From my reading I understand that the issue is the UITabBarController I added to the main view needs to be 'subclassed' and have this code added.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
The next view down/in/subclassed (whatever the correct terminology is), which has .h and .m files is the FirstViewController which adds the table view, this has shouldAutorotateToInterfaceOrientation already set.
#interface FirstViewController : UIViewController <UITableViewDataSource, UITableViewDelegate> {
UITableView *tableView;
NSArray *userList;
}
#property (nonatomic, retain) IBOutlet UITableView *tableView;
#property (nonatomic, retain) NSArray *userList;
#end
#implementation FirstViewController
#synthesize tableView;
- (void)viewDidLoad {
[super viewDidLoad];
// I tried adding
self.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
// lots of other code ; )
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
So the problem appears to be that when [self.window addSubview:tabBarController.view]; adds the tab bar it doesn't add the shouldAutorotateToInterfaceOrientation returning YES bit.
It appears that I need to add a tabBarController subclass, with the shouldAutorotateToInterfaceOrientation in it. So I read up and tried this, as suggested on the interwebs...
// tabBarController.h
#import <UIKit/UIKit.h>
#interface tabBarController : UITabBarController {
}
#end
// tabBarController.m
#import "tabBarController.h"
#implementation tabBarController
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return YES;
}
#end
and adding
#import "tabBarController.h"
to myNewsUKDelegate.m
But that fails with "error: accessing unknown 'view' class method" at the
[self.window addSubview:tabBarController.view];
line in myNewsUKDelegate.m
Further searching hasn't produced anything helpful and my recent Xcode knowledge has now ran dry : ( Any help appreciated.
From my reading I understand that the issue is the UITabBarController I added to the main view needs to be 'subclassed' and have this code added.
No, you don't need to do that. The tab bar controller determines if it supports a specific interface orientation or not by asking all its child controllers if they support this orientation. In your case, these seem to be navigation controllers, which in turn ask their current child controller if it supports the orientation.
In other words, you have to make sure that all your custom view controllers return YES for the desired interface orientation.
You don't need a subclass, you need a Category on UITabBarController. Basically you create a file called UITabBarController + Autoresize.h (and .m)
In the .h:
#import <UIKit/UIKit.h>
#interface UITabBarController (Autoresize)
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation;
#end
in the .m:
#import "UITabBarController + Autoresize.h"
#implementation UITabBarController (Autoresize)
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
//do custom checks here if you only want to autorotate it in certain views or whatever
}
#end
but as the other poster pointed out, ALL the parent views of the view you wish to rotate must support rotation.
I have a UIScrollView that houses a gallery of images the user can scroll through. This view needs to be visible on each of three separate UIViewControllers that are housed within a UITabBarController. Right now, I have three separate UIScrollView instances in the UITabBarController subclass, and the controller manages keeping the three synchronized (when a user scrolls the one they can see, programmatically scrolling the other two to match, etc.), which is not ideal.
I would like to know if there is a way to work with only ONE instance of the UIScrollView, but have it show up only in the UIViewController that the user is currently interacting with. This would completely eliminate all the synchronization code. Here is basically what I have now in the UITabBarController (which is where all this is currently managed):
#interface ScrollerTabBarController : UITabBarController {
FirstViewController *firstView;
SecondViewController *secondView;
ThirdViewController *thirdView;
UIScrollView *scrollerOne;
UIScrollView *scrollerTwo;
UIScrollView *scrollerThree;
}
#property (nonatomic,retain) IBOutlet FirstViewController *firstView;
#property (nonatomic,retain) IBOutlet SecondViewController *secondView;
#property (nonatomic,retain) IBOutlet ThirdViewController *thirdView;
#property (nonatomic,retain) IBOutlet UIScrollView *scrollerOne;
#property (nonatomic,retain) IBOutlet UIScrollView *scrollerTwo;
#property (nonatomic,retain) IBOutlet UIScrollView *scrollerThree;
#end
#implementation ScrollerTabBarController
- (void)layoutScroller:(UIScrollView *)scroller {}
- (void)scrollToMatch:(UIScrollView *)scroller {}
- (void)viewDidLoad {
[self layoutScroller:scrollerOne];
[self layoutScroller:scrollerTwo];
[self layoutScroller:scrollerThree];
[scrollerOne setDelegate:self];
[scrollerTwo setDelegate:self];
[scrollerThree setDelegate:self];
[firstView setGallery:scrollerOne];
[secondView setGallery:scrollerTwo];
[thirdView setGallery:scrollerThree];
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
[self scrollToMatch:scrollView];
}
#end
The UITabBarController gets notified (as the scroll view's delegate) when the user scrolls one of the instances, and then calls methods like scrollToMatch: to sync up the other two with the user's choice.
Is there something that can be done, using a many-to-one relationship on IBOutlet or something like that, to narrow this down to one instance so I'm not having to manage three scroll views? I tried keeping a single instance and moving the pointer from one view to the next using the UITabBarControllerDelegate methods (calling setGallery:nil on the current and setGallery:scrollerOne on the next each time it changed), but the scroller never moved to the other tabs.
Thanks in advance!
Certainly you should use only one instance of your scroller view. And it will works fine without any troubles. Use method setGallery: like you did, just ensure you add your singleScrollerForAll view to view of current controller in setGallery method:
-(void)setGallery:(UIView *)aScrollerView{
[self.view addSubview:aScrollerView];
}
and call:
[firstView setGallery:singleScrollerForAll];
or
[secondView setGallery:singleScrollerForAll];
and no need to do anything in other two controllers, because when you call addSubview: the subView will be automatically removed from previous superview.