Just trying to add a button to a navigation bar from an image.
code:
UIBarButtonItem *newConvoButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"convos_new.png"] style:UIBarButtonItemStyleBordered target:self action:#selector(newConvoInit:)];
self.navigationItem.rightBarButtonItem = newConvoButton;
result:
(It should be just the dark image without the blue button in the background.)
This is likely overkill for what you want. But I have a good feeling that this will make your life a whole lot easier. The following will give you just an image without any UIBarButtonItem attributes.
UIImage *menuImage = [UIImage imageNamed:#"navBarMenuButton.png"];
UIButton *leftButton = [UIButton buttonWithType:UIButtonTypeCustom];
leftButton.frame = CGRectMake(0, 0, menuImage.size.width, menuImage.size.height);
[leftButton setBackgroundImage:menuImage forState:UIControlStateNormal];
aController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:leftButton];
This method implements a custom UIButton, which given the frame of the UIImage you're using, will give you nothing else but the image of your choice added to your UINavigationBar.
A bonus is that you don't have to worry about re-sizing anything in case the image ever changes in the future because the frame inherits from the UIImage.
Best of luck!
Related
I am trying to create an UIToolBar looks like image-1 , however output of my operations did occur as image-2. How could I add a shadow layer of UIToolBar and separator between its Items ?
I did find this question for separator but there no answer in there -> Separator between toolbar items in UIToolbar
You can check this apple doc : https://developer.apple.com/library/content/documentation/UserExperience/Conceptual/UIKitUICatalog/UIToolbar.html#//apple_ref/doc/uid/TP40012857-UIToolbar
Also there is a library option on GitHub:
https://github.com/iosphere/ISHHoverBar
EDIT:
This is how you use the lib (ViewDidLoad)
UIBarButtonItem *mapBarButton = [[MKUserTrackingBarButtonItem alloc] initWithMapView:self.mapView];
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
[infoButton addTarget:self action:#selector(toggleOrientation:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *infoBarButton = [[UIBarButtonItem alloc] initWithCustomView:infoButton];
[self.hoverbar setItems:#[mapBarButton, infoBarButton]];
I have a bar with Bar Items, my .png image has green color, but when i add it to storyboard it's displaying as blue.
How can i make it display the image as it is?
Use tintColor of UIBarButton to set the desired color for the image.
If its absolutely necessary to use original image colors, use this to set the image:
[aBarButton setImage:[[UIImage imageNamed:#"xyz.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
The docs are a little ambiguous about this
The images displayed on the bar are derived from this image. If this
image is too large to fit on the bar, it is scaled to fit. Typically,
the size of a toolbar and navigation bar image is 20 x 20 points. The
alpha values in the source image are used to create the images—opaque
values are ignored.
Essentially what this is saying is the image you supply will not be what is actually displayed. Instead the system uses the alpha mask of the image and the tintColor of the item to generate the final display.
add image programmatically
[button setImage:[[UIImage imageNamed:#"imageName.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] forState:UIControlStateNormal];
if its not work then try this:-
UIImage *myImage = [UIImage imageNamed:#"myImageFile.png"];
myImage = [myImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIBarButtonItem *menuButton = [[UIBarButtonItem alloc] initWithImage:myImage style:UIBarButtonItemStylePlain target:self action:#selector(menuObject:)];
self.navigationItem.leftBarButtonItem = menuButton;
if its not work then try this:-
#define setTurqoiseColor [UIColor colorWithRed:68.0f/255.0f green:181.0f/255.0f blue:223.0f/255.0f alpha:1.0]
UIBarButtonItem *menuButton = [[UIBarButtonItem alloc] initWithImage:buttonImage style:UIBarButtonItemStyleBordered target:self action:#selector(toggleMenu)];
menuButton.tintColor = setTurqoiseColor;
To set tint color of bar item global, in your App Delegate, add these lines of code
UIBarButtonItem *barButtonAppearance = [UIBarButtonItem appearance];
[barButtonAppearance setTintColor:[UIColor redColor]]; // set to your color
[[UIBarButtonItem appearance] setTintColor:[UIColor redColor]];
You have to set your UITabBar tintColor.
If you would like to add a custom color / gradient you can set your tabBarItem image and selectedImage property as follow:
customTabBarItem.selectedImage = UIImage(named: "customSelectedImage")!.imageWithRenderingMode(.AlwaysOriginal)
customTabBarItem.image = UIImage(named: "customUnselectedImage")!.imageWithRenderingMode(.AlwaysOriginal)
i'm trying to add a back button using a custom png file for the background, but every time i add the background using the storyboard it just become blue like this:
How can i add a background image on a UIbarbutton?
the back button look like this:
This is the standard behavior in iOS 7 for an image in a button. The image is rendered as a template image, with opaque areas colored the current tint color, and transparent areas, transparent. If you want to see the image, you need to create the image with imageWithRenderingMode: and pass UIImageRenderingModeAlwaysOriginal as the argument.
You will need to do it grammatically.
I have tried doing it in storyboard, and it looks like there is a really strange bug, that causes the developer to decide - either use text or use an image, not both....
- (void)viewDidLoad
{
[super viewDidLoad];
[self addButtonsToNavigationBar];
}
- (void)addButtonsToNavigationBar
{
UIButton *regularButton = [[UIButton alloc] initWithFrame: CGRectMake(0, 0, 100.0f, 30.0f)];
UIImage *historyButtonImage = [UIImage imageNamed:#"image_name.png"];
// can set the background color instead of setting an image.
[regularButton setBackgroundImage:historyButtonImage forState:UIControlStateNormal];
[regularButton setTitle:#"Some button name" forState:UIControlStateNormal];
[regularButton addTarget:self action:#selector(historyButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *navigationBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:regularButton];
self.navigationItem.leftBarButtonItem = navigationBarButtonItem;
}
I'm working on PSPDFKIT,
I want to change default button images.
and I want to change frame settings.
can anyone suggest me solving those problem
thanks
You can change the Image from this code, here I am changing the image activityButton.
UIImage *image = [[UIImage imageNamed:#"YourImage"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIBarButtonItem *myActbutton = [[UIBarButtonItem alloc] initWithImage:image style:UIBarButtonItemStylePlain target:self.activityButtonItem.target action:self.activityButtonItem.action];
self.leftBarButtonItems = #[backBarButton,myActbutton,self.outlineButtonItem,self.brightnessButtonItem,self.searchButtonItem];
//self.leftBarButtonItems = #[backBarButton,self.activityButtonItem,self.outlineButtonItem,self.brightnessButtonItem,self.searchButtonItem]; your original code
I have created a custom button using a .png image that has transparency. However, when I implement it as a UIImage, the transparency is lost. Here's the code that I'm using:
- (void)setMyCustomBackButton;
{
UIImage *backButtonImage = [UIImage imageNamed:#"Back Button.png"];
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
[backButton setBackgroundImage:backButtonImage forState:UIControlStateNormal];
[backButton addTarget:self action:#selector(popCurrentViewController) forControlEvents:UIControlEventTouchUpInside];
backButton.frame = CGRectMake(0, 0, backButtonImage.size.width, backButtonImage.size.height);
UIView *backButtonView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 63, 33)];
backButtonView.bounds = CGRectOffset(backButtonView.bounds, -12, -2);
[backButtonView addSubview:backButton];
UIBarButtonItem *finalBackButton = [[UIBarButtonItem alloc] initWithCustomView:backButtonView];
self.navigationItem.leftBarButtonItem = finalBackButton;
}
Is there a UIImage property for transparency? Does it have to do with opacity?
If you're creating the PNG in an image editing software, please make sure you've encoded the transparency while creating the image. Sometimes some image editors have an option for 'saving transparency' that's unchecked by default, when you're exporting something as a PNG.
Other than that, any transparency on a PNG will show up on a UIButtonTypeCustom. You don't need to do anything special to preserve transparency on a UIImage that's loading up a PNG.
Before you use the image in the code, please open it in Preview to make sure the transparency is present.
Oh and to answer your other question, UIImage does not have any properties relating to transparency. The closest thing you have is the alpha property for a UIView but even that simply changes the overall opacity of your UIView.
EDIT: Missed this the first time I read your question. Try:
UIBarButtonItem *finalBackButton = [[UIBarButtonItem alloc] initWithCustomView:backButton];
No need to have the backButtonView. You can pass in the UIButton as the custom view. I use this to create custom bar button items. This should fix your problem.
EDIT 2: The UIBarButtonItem class does not have an alpha property you can set. Also, modifying the alpha property of the UIButton that you set as the UIBarButtonItem's custom view won't affect the transparency of the UIBarButtonItem.
The only way you can do this is to modify the transparency of the source image being used for the UIButton.
Modify your original PNG to have the desired transparency you want (and based on your comments, you need a very low transparency). Use an image editing software / preview to fine tune the transparency before you export the PNG.