I would like to create a custom Info type button. For the halo effect that goes over the button Image, do I place an ImageView ontop? Or can i try to add the halo with setImage? I tried setImage, but it seems when u try to set the halo, which is larger than the actual button, the halo gets resized to the button's bounds. I tried disabling clipsToBounds, autoresizing mask, and setting contentMode for the button..but none seem to work.
Neither. All you have to do is create a generic button (either with [UIButton buttonWithType:UIButtonTypeCustom] or just [[UIButton alloc] initWithFrame:...] and set its showsTouchOnHighlight property to YES.
Related
I have multiple buttons in an outlet collection with no image defined on any of them in the inspector. I use a for loop and the following line of code to set the image on each button after each interaction.
[button setImage:(UIImage *)image forState:(UIControlState)UIControlStateNormal];
When the application starts in the simulator, some of the buttons have the image neatly fit in the button, the others have a tall, skinny version of the image. If I understand how this works, at the beginning the code to set the image has not been executed.
How is the image being displayed at the beginning?
How do some buttons have the correct image and others are screwy?
It sounds like your buttons may not be all using the same contentMode. Look at the view in interface builder and go to the attributes inspector and under "View" you should see a "Mode" drop down with values like "Scale to fill", "Aspect Fit", "Aspect Fill". You should make sure this value is the same for all your buttons. (Obviously use the value from whichever buttons are displaying the way you want). You can see what each mode option does here:
http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIView_Class/UIView/UIView.html
Use this if you don't have a background.
[button setBackgroundImage:image forState:UIControlStateNormal];
The background image is scaled to fill the bounds, but the image is not.
I would like to make a generic class that when tapped, makes the element grayish.
Facebook's app is the perfect example of what I want to achieve. All their links and images become gray when tapped.
I can only guess that they are subclassing UIButton.
I have made my button's style UIButtonTypeCustom to get rid of the rounded border. Beyond this, I don't know how to have the gray overlay because I see no such property in the documentation.
Its simple:
#define TAG_GRAYVIEW 5671263 // some random number
// add the gray overlay
UIView *grayView = [[UIView alloc] initWithFrame:button.bounds];
grayView.backgroundColor = [UIColor grayColor];
grayView.tag = TAG_GRAYVIEW;
[button addSubview:grayView];
// remove the gray overlay
UIView *grayView = [button viewWithTag:TAG_GRAYVIEW];
[grayView removeFromSuperview];
I think you need to use a semi transperant grey image PNG file. You need to then set Image of button in Highlighted state.
Also note that both the images for Normal State and Highlighted State need to have the images with titles on them.
As once we set the image to button, btn.titleLabel.text won't be displayed.
So you can have a image with transperant background and title on it for Normal state. And an grey image with title on it for Highlighted State.
Code for doing it programmatically is
[btn setImage:#"Transperant.png" forState:UIControlStateNormal];
[btn setImage:#"Grey.png" forState:UIControlStateHighlighted];
Hope this helps you.
The default UIButton masks the opaque content using a gray highlight. For example when using a transparent png, only the parts that contain non-transparent pixels will be grayed out on touch. The default UIButton highlight has no effect on subviews/sublayers, and will only work on provided images. What you see in the Facebook app is probably just a UIWebView highlight, possibly customized using css.
To create something similar using your own control (to prevent the overhead of a UIWebView) you should probably create your own UIControl subclass and highlight the content on touch using a transparent CALayer. You can even mask the CALayer to only highlight the actual contents, instead of a rectangular shape.
Also see my stackoverflow post on creating custom controls for iOS by subclassing UIControl.
Try setting the button up something like this.
*mind you I didn't create the image for this example.
Set your button type to custom, and in "State Config" select "Highlighted" from there you will want to set the image of the button to be a semi-transparent grey image. There are probably several other ways to achieve this same effect but this one should be nice and simple.
how to Change UIbutton background color??
I try it on IB, but it doesn't work. only changes it for custom button.
I would like to change the white color on the rounded rect button.
Or instead how to make a custom button whit rounded corners
thanks!
Rounded rect button's color can be changed to any color with the background color property in IB as well as through coding, but can not change its color to transparent color easily. For that, you better use a custom button with either rounded image or set layer as demonstrated in the example and don't forget to add Quartz Core framework in you project as well as to import it in your class.
UIBUtton *myBtn = [UIButton buttonWithType:UIbuttonTypeCustom];
myBtn.frame = frame; //your desired size
myBtn.clipsToBounds = YES;
myBtn.layer.cornerRadius = 5.0f;
[self.view addSubView:myBtn];
You may find it difficult to adjust the default button. However you can use any view you want with a custom button.
Here's an article on creating views with rounded corners:
http://iphonedevelopment.blogspot.com/2008/11/creating-transparent-uiviews-rounded.html
You also may look at a program called Opacity, which allows you to create a a lot of customized standard iOS interface art/buttons.
http://likethought.com/opacity/
UIButton *tagButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
and have a look at this... that my do the trick.. i did it for mine.
You can use a custom UIButton with custom images for backgroundimage for each state. Just make the different states of your rounded button in photoshop for example.
You can use Custom button But for that use the image of button of white rounded corners
so it will be look like white round rectangle button
You should use UIButtonTypeCustom, instead of any other.
I have a UIToolbar with a UIBarButtonItem that I created in Interface Builder. The UIBarButtonItem is a bordered button that contains a custom image.
The button takes up the entire length of the toolbar. I have tried using different images, changing the width of the button... I don't know what else to do. It stretches across the entire toolbar.
If I use one the provided "Identifiers" (camera, trash, compose...) the button appears a normal size.
How it looks in Interface Builder
How it looks when I run it on the iPhone
SOLUTION
After some more tinkering, here is what I found: if I create a new UIToolbar and add custom image to the UIBarButtonItem, it works fine - but as soon as I connect the UIBarButtonItem to an IBOutlet, it goes large. I had to then specify the UIBarButtonItem's width in the code, via the IBOutlet.
Try adding a UIBarButtonSystemItemFlexibleSpace on the right of the camera bordered item.
I'm not an expert, but I think it might have to do with how the frame is defined in the "sizing inspector", could you maybe show a screenshot of the settings?
Is there a way to make a button transparent without alpha?
To explain: I have a background image on my view. There is also a button with an image background. If the image has a transparent part I see white inside the button's background image.
Is it possible to make the image transparent?
You can set the button type to 'Custom', either in code with: UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; or in IB on the Attributes pane, under Button -> Type -> Custom.
Set the backgroundColor of the button to [UIColor clearColor] and optionally its opaque to NO (Should automatically be applied by setting the background color to transparent).
You want to set the button opaque property to NO.
In InterfaceBuilder, you have a checkbox to do that.