I've got a button created in photoshop which is already the exact size to use for displaying.
In IB I created a RRB and set the background image to the button .png. However this doesn't display properly - there is a white boarder between my .png button and the button provided by IB, especially at the corners which must have a different radius. I've tried playing with all the various setting in IB but couldn't get it to go away.
However if instead of setting the .png to the background image I set it to the image then it looks perfect (what is the difference between the image and the background image?).
However I simply cannot get the button text to appear when the .png is set to the image as opposed to the background, though it does when the .png is set to the background image. Again I've tried setting all various settings in IB but cannot get the text to appear.
WHat am I doing wrong, what should I be doing to get it to work?
I know I could create the button and text programatically, but I want to understand why I can get it to work using IB.
EDIT:
I've changed the type to custom but it still doesn't appear properly. See the images I've posted, the one without the text is how it should appear and what it looks like if I set the .png to the image rather than the background. The second one is what it looks like if I set the background image to the .png and set the type of button to custom. THe 3rd one is the background image set to the .png and the type as rounded rect.
Use button type = UIButtonTypeCustom
It looks like your button background image doesn't have the same dimensions as your UIButton.
iOS supports something called "strechable images", allowing you to define which part of the image should be streched. Unfortunately, this can't be done in Interface Builder. In code, you can do it like this:
-(void)viewDidLoad
{
[super viewDidLoad];
UIImage *stretchableImage = [[someButton backgroundImageForState:UIControlStateNormal] stretchableImageWithLeftCapWidth:5 topCapHeight:5];
[someButton setBackgroundImage:stretchableImage forState:UIControlStateNormal];
}
IMPORTANT: stretchableImageWithLeftCapWidth:topCapHeight: is deprecated in iOS 5, but the only solution if you need to support iOS 4 as well. If you can go iOS 5 only, use resizableImageWithCapInsets:.
Rather than using a Rounded Rectangle button type, set the button type to UIButtonTypeCustom.
This will do as you want, in that it will wrap the button around the image you provide it.
Related
Is there a way to assign a stretchable image to a UIButton from Xcode's Interface Builder? and not from code? I mean, to set an image and stretch it only on certain parts (like 9-patch for android)
I am using the properties of image, and background and the stretching section of the view but nothing seems to work to stretch the image on the edges I place.
Yes, I think what you are looking for is slicing. In the asset catalog, when you select an image, on the bottom right corner you can find the Show Slicing button. When you click this button Xcode will display the slicing editor. By using it, you can define which parts of an image should stretch and which should stay unchanged.
The editor should display something like this.
You can find another example here
I want a customized button with my own background. The thing is, though I've set the background of the PNG file to transparent, the transparent part was still included in xcode, showing the bigger border. Any idea to solve this problem? In this simple demo I need the black part only. I created this button in xib, and imageView has this problem too. Thanks.
When you set the background image of the button, it took the PNG file you chose and made that the background image. If you have alpha (transparent) space on your PNG file, it still counts as pixels adding to the size of your image. They're just clear pixels. You'll need to edit your PNG file to be just the black part that you want, removing the alpha.
A tip, when making custom buttons with background images, click off of the button to deselect it, then click the button to select it again (Just to make sure. After you select a file, even though the button looks selected, your hotkeys are affecting the attribute inspector, not the button), then hit cmd + =. This will auto size the button to be the size of the image that you added as the background image. If you don't do this, you'll probably see distorted images, since the default is to change the aspect to fill the button's image view.
Set the opaque flag on the button to false.
Alright, this is struggling me by now. I have a PNG image which has the size of 10x36px.
When I try to use that in any of my views it gets resized. Not the frame property, this one remains intact. But visually the image is not the same.
The real image is like this . (Sorry if you can barely see it. That's because it has a white background on a white foreground).
But when I am in the simulator (it happens on a device too) it looks like this.
.
I'm not using contraints(I turned off AutoLayout in order to find the bug).
I printed the frame of that button and it's width, height, x and y values are just as they are in the interface builder. And I printed them everywhere and in response to different events too(I know, that's not the reason. I'm just desperate).
This happens only with this PNG specifically cause other UIButton I have in the very same view, but with differents Images, are working just fine.
What could be the cause of this error?
EDIT:
Trying as a background image it got better. But still not perfect.
Place the png image inside an empty 36x36 png image in Photoshop/Pixelmator to stop it resizing and preserve the original ratio.
Or try setting the views content mode to "aspect fit" in Interface Builder or programmatically:
yourImageView.contentMode = UIViewContentModeScaleAspectFit;
The cause could be that UIBarButtons treat images differently than UIButtons. UIBarButtons are typically used in UINavigationBars or UIToolbars while UIButtons are used typically in the View.
Make sure you are using Button background image and not Button image.
Button background image covers the whole button background.
Button image places the images on a portion of the background.
Also, use xcassets. It comes with the project template. If you don't have it (deleted it), add a new one and create an image set. Once you do that, add your images. Make sure to select "Render as original image" for each image in your image set.
The PNG image you linked to isn't 10x36 pixels, but 10x30. Oops?
I'm trying to change the appearance of my UIButtons int the view as well as UIBarButtonItems in the NaviBar or toolBar or SegControl.
And here are 2 questions.
NO.1. How can I set customed background pictures to the buttons I mentioned while I can change their titles programmaticly? I mean I found that if I set the background of a button, the title seems to be concealed by the background image?
NO.2. I tried to add the text of the title directly on the png, ( which is actually a imperfect way since I need to change the title during the runtime). Anyway it works out both the image and the text, but the resolution seems to be reduced because the text became sort of blurred.
Can anyone give me some advices how to achieve it? Thanks a lot!
NO.1 The button title should not be obscured by the background image. Are you setting the button's image in code like this:
[btn setBackgroundImage:image forState:UIControlStateNormal];
? You may be instead setting the button's image property (which is different from its background image).
NO.2 You really don't want to be adding text to the button PNG, for the exact reason you mention. Buttons in iOS are designed to display images and text the way you want - put your energy into getting the built-in buttons working the way they should. There are umpteen billion tutorials out there about how to do this.
I'm trying to use the standard highlighting logic for a UIButton but set the background image for the Normal state. When do this programmatically everything works fine, but when my button is set in Interface Builder I get the following results:
Has anyone run in this where the standard highlighting is changing the way the background image looks? Just to be clear I want the color change, just not the squared off corners on the left.
Figured it out. Apparently if my button size is smaller than the background image it scales appropriately for Normal State, but the highlighted state causes this strangeness. Good to know since I'm attempting to use a single image and just scale it for all of my various buttons.
In this case my IB button was set as 77pt wide, but my image is 97pt wide. It finally looks correct with my IB button set at 90pt wide or larger.