Hi I am developing Iphone application in which I want to set some text for my back button. I tried in following way :
self.navigationController.navigationBar.topItem.title = #"NOTIFICATION";
It is working fine if I gave small text but if I gave long text then it is not showing my text. Instead of that it is showing default "Back" text. How to do this? Any one know about it? Need some help. Thank you.
It is the default behaviour brother.
If you want to display long text (which you should not - because if you display long back button text then there'll be no space available to display TITLE of current view controller.)
Although you can achieve it using your own back button (Write below code in the viewcontroller2).
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:#"asdas" forState:UIControlStateNormal];
[button setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];
button.frame = CGRectMake(0, 0, 100, 44);
[button addTarget:self.navigationController action:#selector(popViewControllerAnimated:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.leftBarButtonItem = customBarItem;
Related
I created a UIBarButton programmatically with the following code:
UIButton * rightButton = [UIButton buttonWithType:UIButtonTypeCustom];
[rightButton setFrame:CGRectMake(0, 0, 81, 30)];
[rightButton setBackgroundColor:[UIColor clearColor]];
rightButton.layer.borderColor = [UIColor blackColor].CGColor;
rightButton.layer.borderWidth = 0.5f;
rightButton.layer.cornerRadius = 5.0f;
rightButton.titleLabel.font = [UIFont fontWithName:#"HelveticaNeue-Bold" size:12];
[rightButton setTitleShadowColor:[UIColor blackColor] forState:UIControlStateNormal];
[rightButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
//set text according to sign in status
if (signIn) {
[rightButton setTitle:#"5 votes left" forState:UIControlStateNormal];
} else {
[rightButton setTitle:#"Sign in" forState:UIControlStateNormal];
}
UIBarButtonItem * rightBarButton = [[UIBarButtonItem alloc] initWithCustomView:rightButton];
self.navigationItem.rightBarButtonItem = rightBarButton;
The obtained button has the desired aspect but now what I need is that when the status of the button is highlighted there should be a gradient effect fading to black to let the user know that he has pressed the button, because right now when I pressed the button, nothing happens to the view so the user has no way to know that he has pressed the button.
I want to explore a choice that does NOT involve setting the background images for the desired states because the text of the button can change dynamically according to the app configurations so I need to do this entirely by code.
Although this won't directly answer your question, it may help. I had to create some graphics for a button dynamically and came up with a method using core graphics to create my button image. It gives me the flexibility to change to appearance parametrically in the code.It draws the button image in an abstract graphics context and then converts the result into an image that I can use for my button. YOu might get enough out of my explanation that you can try it yourself for your needs.
Subclass UIButton and add a CALayer or CAGradientLayer to achieve the highlight effect that you want. Set the initial state of the highlight layer to hidden. Override setHighlighted: with something like:
- (void) setHighlighted:(BOOL)highlight {
highlightLayer.hidden = !highlight;
[super setHighlighted:highlight];
}
So the code I have is as follows:
// Create a containing view to position the button
UIView *containingView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 23.5, 21.5)] autorelease];
// Create a custom button with the image
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:#"Settings.png"] forState:UIControlStateNormal];
[button addTarget:self action:#selector(settings) forControlEvents:UIControlEventTouchUpInside];
[button setFrame:CGRectMake(-19, -3, 21.5, 21.5)];
[containingView addSubview:button];
// Create a container bar button
UIBarButtonItem *containingBarButton = [[[UIBarButtonItem alloc] initWithCustomView:containingView] autorelease];
self.navigationItem.rightBarButtonItem = containingBarButton;
The issue is that my Settings.png original image size is 21.5, 21.5 and there fore the button is super hard to click. I have to tap really hard in order to trigger the UITouchUpInside to be triggered. This will clearly be rejected if I put it in the app store, as it is not in compliance with apple's HIG. Is there a way around this? I still need to use UIView as the container for the UIButton as I'd like to position it correctly on the UINavigationBar
Try to set a bigger fram to the button like 40,40 and set the content mode to be the center so the image will apear to be in the center.
button.contentMode = UIViewContentModeCenter;
Tell me if that helped
On a navigationBar as a rightBarButtonItem I take edit button by the following coding
self.navigationItem.rightBarButtonItem=self.editButtonItem;
but I want to change the color of edit button I mean I want to change the color of rightBarButtonItem. How can I do this?
plz reply as early as possible.
thanx in advance.
You will need to create a custom button and initialize your UIBarButtonItem using initWithCustomView.
Create your UIButton as you like if with your custom image and then:
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:yourUIButton];
You are constrained making standard UIBarButtonItem. But you can init it with any UIView of your choice, e.g. standard UIButton which you can color as you like.
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
myButton.frame = CGRectMake(0, 0, 30, 20); // change as you like being constrained with navigation bar hieght
[myButton setTitle:#"My Button" forState:UIControlStateNormal];
[myButton setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[myButton setImage:[UIImage imageNamed:#"Image for my button.png"] forState:UIControlStateNormal]; // <-- you can provide image instaed of title if you like
[myButton setBackgroundImage:[UIImage imageNamed:#"Background image for my button.png"] forState:UIControlStateNormal];
[myButton addTarget:self action:#selector(myAction) forControlEvents:UIControlEventTouchUpInside]; // <-- don't forget configure this!!!
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:myButton];
Visit this link. It is kind of same answer.
specially indicating or highlighting a toolbar button when a note is added in iphone
Usage of method [[UIBarButtonItem alloc] initWithCustomView:btnInfo]; can help.
I have a UIToolbar which I am trying to put some custom UIBarButtonItems on. However, when I use the code below, the button shows up with NO border.
UIImage *cameraRollButtonImage = [UIImage imageNamed:#"Flash.png"];
UIButton *cameraRollButton = [UIButton buttonWithType:UIButtonTypeCustom];
[cameraRollButton setImage:cameraRollButtonImage forState:UIControlStateNormal];
cameraRollButton.frame = CGRectMake(0.0, 0.0, cameraRollButtonImage.size.width, cameraRollButtonImage.size.height);
// Initialize the UIBarButtonItem
cameraRollButtonItem = [[UIBarButtonItem alloc] initWithCustomView:cameraRollButton];
[cameraRollButtonItem setStyle:UIBarButtonItemStyleBordered];
//Add the Buttons to the toolbar
NSArray *toolbarItems = [NSArray arrayWithObject:cameraRollButtonItem];
[self.cameraTabBar setItems:toolbarItems];
This displays the button just fine, however, there is NO button border (like standard the UIBarButtonItem). So the line [cameraRollButtonItem setStyle:UIBarButtonItemStyleBordered]; doesn't seem to do anything.
Does anyone have any experience with this?
I would like to be able to eventually rotate the image in the button when the device orientation is changed (keeping the toolbar static), so simply adding an image to the UIBarButtonItem doesn't work; I need to get this to work with by using the customView property.
Many thanks!
Brett
Have you considered creating your own button image with a border? You can use it as the backgroundImage of a UIButton:
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setBackgroundImage:_backgroundImage_ forState:UIControlStateNormal];
// So that the button does not gray out when disabled
[button setBackgroundImage:_backgroundImage_ forState:UIControlStateDisabled];
[button setImage:_cameraImage_ forState:UIControlStateNormal];
button.frame = CGRectMake(0, 0, 125, 30);
You could then use button with initWithCustomView:.
The PSD file here might give you an overview of how to create your own button.
I have the following in my view did load on my table view controller:
UIButton *change_view = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[change_view setTitle:#"List" forState:UIControlStateNormal];
[change_view addTarget:self action:#selector(toggleView:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithCustomView: change_view];
self.navigationItem.rightBarButtonItem = button;
When I run the program, it doesn't show any title or the rounded rectangle button. However, if I change the type to UIButtonTypeInfoLight, it will show up... so what is the problem?
I'd prefer the way below to set the button's bounds.
[button setTitle:#"Title" forState:UIControlStateNormal];
[button sizeToFit];
Try to set an appropriate frame to your change_view.
When you use UIButtonTypeInfoLight type button uses some built-in size (likely depended on icon used for it), with UIButtonTypeRoundedRect type default frame is applied which must be CGRectZero rect.