I have made a barbuttonitem programmatically on a toolbar overlay. All of this appears when my camera is accessed. The button functions fine and the selector is fully capable of calling it.
Here's the overlay in .m , take a look at the doneButton selector.
- (UIView*)CommomOverlay {
//Both of the 428 values stretch the overlay bottom to top for overlay function. It
doesn't cover it.
UIView* view = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,420)];
UIImageView *FrameImg = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,320,420)];
[FrameImg setImage:[UIImage imageNamed:#"newGraphicOverlay.png"]];
FrameImg.userInteractionEnabled = YES;
UIToolbar *myToolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 428, 320, 50)];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self
action:#selector(doneButtonPressed)];
[myToolBar setItems:[NSArray arrayWithObjects: cancelButton, flexiSpace2, flexiSpace,
doneButton, nil] animated:YES];
[view addSubview:FrameImg];
[view addSubview:myToolBar];
return view;
}
Here's method I'm using for my void function.
//NewViewController is the nib I want to bring up when done is clicked.
-(void)doneButtonPressed {
NewViewController *UIView = [[NewViewController alloc] initWithNibName:nil bundle:nil];
UIView.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:UIView animated:NO];
[UIView release];
NSLog(#"Acknowledged!");
}
The button is being called, but nothing happens. As you can see I added an NSLog function to see whether it was being called or not. "Acknowledged" shows up in the log when the button is clicked, so it's not a problem with the selector. The app doesn't crash when i use the button either, which should occur had I done some heavily faulty coding (in fact I don't even get any warnings about it), as far as Xcode is considered, everything is fine which, needless to say isn't.
I also have my .h files of NewViewController in place correctly in the view controller in which this code is being implemented.
UIView is the name of a class. Don't use it as the name of a variable. At best it is hugely confusing and is a probable reason for your problems. Rename UIView to something like myView everywhere in doneButtonPressed.
Related
I have a ViewController that contains a textfield. When the user begins editing the text, I want to display
a ViewController that the user can use to select the font for the textfield. I am using Xcode 5 with
storyboards and compiling for IOS 7. This is where I present the view controller...
- (void)textViewDidBeginEditing:(UITextView *)textView
{
FTViewController *fontSelector = [[FTViewController alloc] init];
[self presentViewController:fontSelector animated:YES completion:nil];
}
I am using a Cocoapods project called FTFontSelector to pick the font. In the FTViewController that gets
presented, I have the following code that runs when the view controller loads. This code adds a UIToolbar
with two buttons, one of which I would like to be used to dismiss the view controller, but all of the
attempts I have made at making this happen have not worked.
- (void)loadView;
{
CGRect frame = [[UIScreen mainScreen] applicationFrame];
self.textView = [[UITextView alloc] initWithFrame:frame];
self.textView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
self.textView.textAlignment = NSTextAlignmentLeft;
self.textView.font = [UIFont systemFontOfSize:FONT_SIZE];
self.textView.text = #"Hello World!";
self.changeFontButton = [[UIBarButtonItem alloc] initWithTitle:#"Font"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(changeFont:)];
self.dismissFontButton = [[UIBarButtonItem alloc] initWithTitle:#"Dismiss"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(dismissFont:)];
UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth(frame), 44)];
toolbar.tintColor = [UIColor lightGrayColor];
toolbar.translucent = YES;
toolbar.autoresizingMask = UIViewAutoresizingFlexibleWidth;
toolbar.items = #[self.changeFontButton, self.dismissFontButton];
self.textView.inputAccessoryView = toolbar;
self.view = self.textView;
}
This is the method I call to dismiss the view controller that I need help with. I have commented out
what I have tried.
- (void)dismissFont:(id)sender;
{
[self.textView resignFirstResponder];
// This crashes!
//[[self presentingViewController] dismissViewControllerAnimated:NO completion:nil];
}
I suspect part of my problem is that there is no navigation controller in my presented view controller,
but when I tried to add one, the text went behind the view (I could see a few pixels of the top of the text),
and there was no back button, so something I tried to do there was wrong.
I am still pretty new to IOS programmng, so there is a lot I still don't understand. I have the rest of
my app working pretty well now, but this last piece is giving me a headache. I am hoping someone here can
show me how to dismiss this view controller.
[[self presentingViewController] dismissViewControllerAnimated:NO completion:nil];
sends a message to the parent view controller of your view controller. This is clearly not what you want. At best it would dismiss your view controller.
[self dismissViewControllerAnimated:YES completion:NULL];
is what you should do.
From -dismissViewControllerAnimated:completion:
The presenting view controller is responsible for dismissing the view controller it presented. If you call this method on the presented view controller itself, it automatically forwards the message to the presenting view controller.
In this case your view controller (self) is the presenting view controller.
I don't know if the title explains the question itself but here it is ...
I have a UINavigationController which is the parentViewController of a UINavigationController. The thing is the childViewController behaves strange, when I add it as a child it first has the gap for the statusBar (it doesn't occupy the entire screen) and if I "solve" that "bug" by hiding and showing the navigationBar, the gap goes away but now the child doesn't respect the frame I set manually.
Then I tried to continue and when I presented a modal on the child and dismiss it, the entire child goes away ...
What would be wrong there? The parent-child relationship with both containers or what?
Thanks in advice
EDIT: Here's an example project showing the strange behavior
http://www.mediafire.com/?8saa68daqfkf335
EDIT 2: I found a solution actually and I didn't find it really clear on Apple Docs, it says the childViewControllers take its frame from the parentViewController they belong to, but it doesn't say that if the parentViewController "reappears" (like a push on it) the childViewControllers get resized again by the parentViewController frame ... Hope this helps anyone
I believe it would be better to present the second navigation view controller as a modal view controller.
For example, replace your current presentController selector with something like:
- (void)presentController:(id)sender {
ChildViewController1 *cvc = [[ChildViewController1 alloc] initWithNibName:#"ChildViewController1" bundle:nil];
nc3 = [[UINavigationController alloc] initWithRootViewController:cvc];
nc3.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentViewController:nc3 animated:YES completion:nil];
UIBarButtonItem *i = [[UIBarButtonItem alloc] initWithTitle:#"X" style:UIBarButtonItemStyleBordered target:self action:#selector(close)];
cvc.navigationItem.leftBarButtonItem = i;
}
Then, your close selector could become:
- (void)close {
[nc3 dismissViewControllerAnimated:YES completion:nil];
}
(though I'd recommend moving the creation of the button and handling the close actually in ChildViewController1.m).
Of course, this would take all the creation of the navigation controller off ViewController.m's viewDidLoad selector:
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor blueColor];
UIButton *b = [UIButton buttonWithType:UIButtonTypeRoundedRect];
b.frame = CGRectMake(0, 100, 100, 40);
[b setTitle:#"present" forState:UIControlStateNormal];
[b addTarget:self action:#selector(presentController:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:b];
}
Hope it works!
I'm trying to add a UISegmentedControl programmatically as the titleView in a UINavigationController. But it did not show up. Upon further investigation, I found out that the titleView property is ignored if the leftBarButtonItem is not set to nil according to the Apple docs. So I set it to nil but still the segmented control does not show up!
Below is my code.
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.leftBarButtonItem = nil;
UISegmentedControl *statFilter = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:#"Personnal", #"Department", #"Company", nil]];
[statFilter setSegmentedControlStyle:UISegmentedControlStyleBar];
self.navigationItem.titleView = statFilter;
}
What should I do? What am I missing here?
Thanks.
EDIT :
Thanks for all the responses. However, none of them worked for me so I took a deeper look. It must be the way I have laid out my application. I probably should have mentioned that earlier. Apologies.
What I'm creating is a Storyboard app. The main controller is a UITabBarController. When a certain tab is clicked, I want to show a UITableViewController. Since you cannot display a Navigation bar in a UITableViewController, I found out that I must add a UINavigationController and implement a UITableViewController inside it. This is how my app basically look like,
That Dashboard View Controller is connected to a class inheriting from UINavigationController
class. Maybe this is where the issue resides?
Because I just created a small test app, put a UIViewController, embedded in a UINavigationController and wrote the code I have posted in my original question above inside the UIViewController's ViewDidLoad and the segmented control shows up just fine. Now I don't know how to do the same in my main app because there's no other view controllers or anything connected to the navigation controller.
Sorry if I made things even worse. Please comment if anything is unclear.
I guess you have to make the UISegmentedControll a UIBarButtonItem:
UPDATE:
This Code makes the SegmentedControll centered:
- (void)viewDidLoad{
self.title = nil;
UISegmentedControl *statFilter = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:#"Personnal", #"Department", #"Company", nil]];
[statFilter setSegmentedControlStyle:UISegmentedControlStyleBar];
NSMutableArray *buttonArray = [[NSMutableArray alloc] init];
UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
[buttonArray addObject:flexibleSpace];
[buttonArray addObject:[[UIBarButtonItem alloc] initWithCustomView:statFilter]];
[buttonArray addObject:flexibleSpace];
self.navigationItem.leftBarButtonItems = buttonArray;
[buttonArray release];
}
I hope this helps you out!
Use this i hope this will help you
- (void)viewDidLoad
{
[super viewDidLoad];
UIView * navview = [[UIView alloc] initWithFrame:CGRectMake(10, 10, 160,80)];
self.navigationItem.leftBarButtonItem = nil;
UISegmentedControl *statFilter = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:#"Personnal", #"Department", #"Company", nil]];
[navview addSubview:statFilter];
self.navigationItem.titleView = navview;
}
I want to bring up the .nib of "TableViewController" when a done button is clicked on my UIToolBar. But the below isn't allowing the click to bring up a new view. How do I rectify this? Please show me where I went wrong and what should be replaced and why.
//Here's the selector in my overlay.
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:
UIBarButtonSystemItemDone target:self action:#selector(doneButtonPressed)];
//Here's how I made my action. Btw, the uitoolbar has no nib, it's an overlay on the
//(camera mode).
-(void)doneButtonPressed {
TableViewController *tableView = [[TableViewController alloc]
initWithNibName:#"TableViewController" bundle:nil];
tableView.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:tableView animated:YES];
}
//Yet nothing happens when I click on my done button on my overlay. And I've made sure
// i've imported .h frameworks correctly too.
Suppose you were to bring up a nib from a barbuttonitem which is on a UItoolbar overlay. How would you do it?
I was told that to make it function properly I would have to add [barButtonItem addTarget:self action:#selector(doneButtonPressed) forControlEvents:UIControlEventTouchUpInside]; .
But if I add it I get this:
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:
UIBarButtonSystemItemDone addTarget:self action:#selector(doneButtonPressed)
forControlEvents:UIControlEventTouchUpInside];
Which results in me getting an error reading "instance method' - initWithBarButtonSystemItem:target:action:forControlEvents:' not found (return type defaults to 'id')"
Instead of showing me only the correct additive, please show me the solution in addition to the code I've written here.
If you are using XCode 4, you can simply Ctrl+Drag the BarButtonItem, to your .h file, and you can create an IB Action from there automatically.
A UIBarButtonItem follows the default UIControlEventTouchUpInside and you cannot set it. Xcode should auto-suggest the methods for allocating it, but the correct code is:
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(doneButtonPressed)];
Note, there's no forControlEvents:.
Try these changes:
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemDone target:self action:#selector(doneButtonPressed:)];
-(void)doneButtonPressed:(id)sender
{
}
the target is passed the object that initiated the action (i.e. the UIBarButtonItem itself)
Secondly, set a breakpoint in your doneButtonPressed function. If, for example, the tableView is getting set to nil, then you'll see nothing happen. i.e. perhaps there is an issue with instantiating this view controller.
On an iPad application, I want to be able to have multiple buttons in the top bar of a popover. I'm launching it like this:
UINavigationController *nc = [[UINavigationController alloc] initWithRootViewController:vc];
pop = [[UIPopoverController alloc] initWithContentViewController:nc];
[pop presentPopoverFromRect:CGRectInset([tableView rectForRowAtIndexPath:indexPath], 10, 10)
inView:tableView
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
pop.delegate = self;
[nc release];
In the viewDidLoad I want to set the titleView to contain multiple UIBarButtonItems. This is ok on a normal UINavigationController but I need to be able to do this and keep the custom style of the navigation bar on the popover.
I have tried setting the rightBarButtonItem to have a toolbar that contains buttons, but they take the format of the toolbar, which itself will not take the format/style of the popover.
It's a bit hackish, but you can create a truly transparent UIToolbar by subclassing and overriding drawRect: with an empty method. This will still draw the UIBarButtonItems on the toolbar, but not the toolbar itself.
Then, as Nils describes, you can create a bar button item out of the custom toolbar instance and add it as the rightBarButtonItem.
Why you don't use a custom UIView with a UIToolbar or UINavigationBar instead of UIPopoverController?
The effect, is the same!
First you need to set a delegate to the UINavigationController and then implement the nabigationController:willShowViewController:animated: method. In this method you can adjust the left and right bar button items.
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
viewController.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc]
initWithTitle:#"Image Source"
style:UIBarButtonItemStylePlain
target:self
action:#selector(cancelPressed)] autorelease];
}
I had the same problem, and here is what I did :
UIBarButtonItem *uiBarRefresh = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:#selector(forcerefresh)];
UIBarButtonItem *uiBarCurl = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemPageCurl target:self action:#selector(showlist)];
UIToolbar_transparent* tools = [[UIToolbar_transparent alloc] initWithFrame:CGRectMake(0, 0, 133, 44.01)];
tools.barStyle = UIBarStyleBlackTranslucent;
tools.translucent = YES;
tools.backgroundColor = [UIColor clearColor];
tools.tintColor = self.navigationController.navigationBar.tintColor;
[tools setItems:[NSArray arrayWithObjects:flexItem,uiBarRefresh,uiBarCurl,nil] animated:NO];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:tools];
This way you avoid the dull grey background, the pesky white underline, and you can completely customize how you want them positioned, by using fixed or flex spacings.
Best of luck with your project :]