I am trying to setTintColor for a viewcontroller that inherits from a UITableViewController.
I tried to put
[self.navigationController.navigationBar setTintColor:[UIColor blackColor]];
as the last line in loadView, but the color doesn't change. Where should I make this change?
Here is the interface definition of the controller:
#interface MyViewController : UITableViewController
{
Model *model;
NSArray * calculators;
}
#end
UPDATE: I finally put it in viewDidAppear and it worked.
Are you sure that your self.navigationController is not nil? This is a usual bug happenning all the time that you didn't present your MyViewController with a navigationController
Try this
self.navigationController.navigationBar.tintColor = [UIColor blackColor];
I put my solution in the question.
-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController.navigationBar setTintColor:[UIColor blackColor]];
}
Related
I want to create a different class with a view and call that class on screen.
When I run the app, the view does not appear. If I delete that structure and create the button on the main file, it works fine. When I put it on a different class, it does not work.
MyView.h
#import <UIKit/UIKit.h>
#interface viewHome : UIViewController
-(UIView*) myHome;
#end
MyView.m (Creating a button for test)
#import "viewHome.h"
#implementation viewHome
-(UIView*) myHome {
UIView * myScreen = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
myScreen.backgroundColor = [UIColor whiteColor];
UIButton * myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
myButton.frame = CGRectMake(100,100,100,44);
[myButton setTitle:#"Login" forState:UIControlStateNormal];
[myScreen addSubview:myButton];
return myScreen;
}
#end
viewController.m
[...]
- (void)viewDidLoad
{
[super viewDidLoad];
viewHome * fncScreen;
UIView * homeScreen = [fncScreen myHome];
[self.view addSubview:homeScreen];
}
Thanks
Its a bad practice to add one viewController's view as a subview to an another viewcontroller. (unless you are using certain classes/methods that let you have childViewControllers).
Its exactly for this reason, your view doesn't appear in one case, and appears in the other case.
try adding the -(UIView*) myHome method in your viewController.m, and do a
[self.view addsubview: [self myHome]];
here's a good SO post about Nested UIViewControllers:
Is it wise to "nest" UIViewControllers inside other UIViewControllers like you would UIViews?
You could call the method [fncScreen myHome] after allocation your view homeScreen.
like this -
UIView *homeScreen = [[UIView alloc] init];
homeScreen = [funScreen myHome];
[self.view addSubView: homeScreen];
[homeScreen release];
Hope this will help you.
One obvious mistake I see in your code is this line:
viewHome * fncScreen;
OK, that's a pointer declaration, but you didn't actually create the object.
You need something like this:
viewHome * fncScreen = [[viewHome alloc] init];
Then you can call methods on such initialized object.
[[[UINavigationBar appearance] setTitleView:button]
I tried to set title view as button for all navigation item using above line of code but it is not working.How can I set title view for all navigation bars in my project by writing small code in appdelegate ?
Customizing the Appearance of a Navigation Bar
it is alright to modify the barStyle, tintColor, and translucent
properties, but you must never directly change UIView-level properties
such as the frame, bounds, alpha, or hidden properties directly.
For more detail you can follow apple doc UINavigationBar Class Reference
Edit ->
I solved your query
[[UINavigationBar appearance] addSubview:yourView];
Other Navigation Related query
try this dude...
//put whatever object in this view..for example button that you want to put...
UIView* ctrl = [[UIView alloc] initWithFrame:navController.navigationBar.bounds];
ctrl.backgroundColor = [UIColor yellowColor];
ctrl.autoresizingMask = UIViewAutoresizingFlexibleWidth;
[navController.navigationBar addSubview:ctrl];
let me know it is working or not!!!!
Happy Coding!!!
This is how you create a navigation controller in addDelegate and set a title to it,
you have to add the following code to didFinishLaunchingWithOptions method.
Notice that you need to set a root view for the viewController which will the viewController that will be displayed inside the navigationController.
yourViewController *mainVC = [[yourViewController alloc]init];
UINavigationController *navigationController1 = [[UINavigationController alloc] initWithRootViewController:mainVC];
navigationController1.title = #"title";
[window addSubview:navigationController1.view];
If you use iOS4, you can override drawRect
#implementation UINavigationBar (UINavigationBarCategory)
-(void)drawRect:(CGRect)rect
{
UIImageView *itleImageView = //create object
[self addSubView:titleImageView];
//set title view in navigation bar
}
#end
iOS 5,
if ([[UIDevice currentDevice].systemVersion floatValue] >= 5.0) {
if ([self.navigationController.navigationBar respondsToSelector:#selector( setBackgroundImage:forBarMetrics:)]){
UIImageView *itleImageView = //create object
[self.navigationController.navigationBar addSubView:titleImageView];
}
}
i guess this is a right, as i don't have implemented.
I wanted to add a logo in every NavigationController, so I made a subclass of
UINavigationController and used this in the viewDidLoad-Method
UIImage *logo =[UIImage imageNamed:#"logo"];
CGFloat navWidth = self.navigationBar.frame.size.width;
CGFloat navHeight = self.navigationBar.frame.size.height;
UIImageView *logoView = [[UIImageView alloc] initWithFrame:CGRectMake(navWidth-logo.size.width - 5,
(navHeight - logo.size.height) / 2,
logo.size.width,
logo.size.height)];
logoView.image = logo;
[self.navigationBar addSubview:logoView];
When my UITextView is being edited, I want a button to appear. How can I do this?
Thanks!
Implemetn UITextViewDelegate in your class and when editing is being started on UITextView
it'll call it's textViewShouldBeginEditing: function where you can do whatever you want. You can show your button when editing start and hides when editing ends in this function.
– textViewShouldEndEditing
For further detail see this
i will detail above answer a little bit:
YourViewController.h
#interface YourViewController : UIViewController <UITextViewDelegate>
YourViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
self.yourTextView.delegate = self;
}
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView{
// do smth like create a button
return TRUE;
}
Read Apple manual for more
Check out the UITextViewDelegate Protocol Reference. If you set your UIViewController to be the delegate of the UITextView, it will be sent textViewDidBeginEditing: and textViewDidEndEditing:. You can show/hide your button when you receive those messages.
//in view did load.
UITextField entered1 = [[UITextField alloc] initWithFrame:CGRectMake(120.0, 85.0, 150.0, 25.0)];
[entered1 setBackgroundColor:[UIColor whiteColor]];
[entered1 addTarget:self action:#selector(example:)forControlEvents:UIControlEventTouchDown];
[self.view addSubview:entered1];
[entered1 release];
or
[textfieldname addTarget:self action:#selector(example:)forControlEvents:UIControlEventTouchDown];
.........
}
-(IBAction) example:(UIControl *)sender
{
//your code here.
}
Xcode 6.4, iOS 8.4, ARC Enabled
Don't make my mistake, took me a long time to figure it out, but I was adding...
#interface YourViewController : UIViewController <UITextFieldDelegate>
because I am used to working with UITextField's, but obviously we need...
#interface YourViewController : UIViewController <UITextViewDelegate>
Hope this saves someone time. Cheers!
I'm sure this is some stupid mistake, but i'm trying for the past hour to remove a subview from my superview without any success.
On my first view i'm having
UIViewController *helpView = [[[UIViewController alloc] initWithNibName:#"HelpView" bundle:nil] autorelease];
[self.view addSubview:helpView.view];
And then inside helpView i have a button which is connected to an IBAction called "closeHelp" which just does the following:
- (IBAction) closeHelp{
[self.view removeFromSuperview];
}
But this causes my app to crash with EXC_BAS_ACCESS for some weird reason, even those this is inside the HelpView, meaning self.view should be pointed to the correct subview..
Would appreciate your help
Thank you.
Shai.
As Andreas answered, you are trying to remove self.view from its super/parent view.
You basically need to remove the helpView from its parent view.
so it should be
- (IBAction) closeHelp{
[helpView removeFromSuperview];
}
But we dont know what is "helpView" in the above method. As we dont have any handle for it.
So our code should finally look like this.
#define HELP_VIEW_TAG 101 // Give tag of your choice
HelpView *helpView = [[HelpView alloc] initWithNibName:#"HelpView" bundle:nil];
helpView.view.tag = HELP_VIEW_TAG;
[self.view addSubview:helpView.view];
[helpView release];
- (IBAction) closeHelp{
UIView *helpView = [self.view viewWithTag:HELP_VIEW_TAG];
[helpView removeFromSuperview];
}
The self.view does not point to your subview but the root view which your uiviewcontroller manages. You should probably remove only the last object in the subview stack, not the whole view, because now you are removing the whole help view.
Anyway, why do you not present the viewcontroller modally instead of doing this?
[self presentModalViewController:helpView animated:NO/YES];
helpView. modalTransitionStyle = //One of the constants below
UIModalTransitionStyleCoverVertical
UIModalTransitionStyleFlipHorizontal
UIModalTransitionStyleCrossDissolve
UIModalTransitionStylePartialCurl
Usually I am writing self.modalTransitionStyle = // One of the constants
in the viewcontroller which will be presented modally, instead of spreading the code.
You are initializing helpView as a UIViewController.
Make sure you have #import "HelpView.h" (or whatever the helpView .h file is called) in the .h file of the view controller where you are initializing it.
Then, use this code:
HelpView *helpView = [[HelpView alloc] initWithNibName:#"HelpView" bundle:nil];
[self.view addSubview:helpView.view];
That should fix it.
The easiest solution for me eventually was to just define my XIB's file owner as the same class as the parent controller, meaning the parent controller would control both the parent and the subview, which just makes a lot easier. :)
Declare the help view on calss level.
in.h file
#class HelpView;
..
#interface
{
HelpView *helpView;
}
#property(nonatomic,retain)HelpView* helpView;
In.m file
#import "HelpView"
#synthensize helpView;
now add this Code where you want
helpView = [[HelpView alloc] initWithNibName:#"HelpView" bundle:nil];
helpView.view.tag = HELP_VIEW_TAG;
[self.view addSubview:helpView.view];
- (IBAction) closeHelp{
//UIView *helpView = [self.view viewWithTag:HELP_VIEW_TAG];
[helpView removeFromSuperview];
}
-(void)dealloc
{
[helpView release];
}
I have a UIViewController that is a UISearchBarDelegate and a MKMapViewDelegate. The searchBarSearchButtonClicked event works fine, but when testing in iOS 4.2 the searchBarCancelButtonClicked never gets called when hitting the cancel button. In 4.3 everything works fine. I have other views with identical code and it works fine. I have triple checked the method signatures.
Could it be something to do with the MapView, or am I doing something blatantly wrong?
My .h file:
#interface MyViewController : UIViewController <UISearchBarDelegate,MKMapViewDelegate,UIAlertViewDelegate>{
MKMapView *mapMainView;
UISearchBar *sBar;
}
#property (nonatomic, retain) UISearchBar *sBar;
#end
And I create the search bar like so:
sBar = [[[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 320.0, 70.0)] autorelease];
sBar.delegate = self;
sBar.showsCancelButton = YES;
[self.view addSubview:sBar];
[sBar becomeFirstResponder];
The method:
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
[searchBar resignFirstResponder];
searchBar.hidden = YES;
}
Does anyone have an idea of why this may be happening?
I had the exact same problem. Holding the cancel button for a few seconds worked.
The reason for me was that I had implemented UITapGestureRecognizer in the tableview. So this took precedence over the button click or 'x' button click in the search bar.
The solution in my case was to restrict the gesture recognition to only the backgroundview of the tableview. I guess similar thing might be happening in your case. Try to restrict the gesture recognizers to the minimum subview required and the search bar should be outside that view.
Probably your sbar object are releasing, in this case is an autorelease object, Why ?. Try declaring sBar as IBOutlet property. Make the apropiate links in the Interface Builder, remove the alloc as you code it, put in viewDidUnload
self.sbar = nil;
and releas it in dealloc. in viewDidLoad put this.
sBar.delegate = self;
sBar.showsCancelButton = YES; // this is an option in object inspector
[self.view addSubview:sBar];
[sBar becomeFirstResponder]; //remove this.
Tell me if it works
try this:
sBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 320.0, 70.0)];
sBar.delegate = self;
sBar.showsCancelButton = YES;
[self.view addSubview:sBar];
and try to put release in dealloc
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (tableView == self.searchDisplayController.searchResultsTableView)
{
[self.searchDisplayController setActive:NO animated:YES];
[self.searchDisplayController.searchBar resignFirstResponder];
}
}