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Change button background color using swift language
(12 answers)
Closed 6 years ago.
I am trying to make a settings page where if you select the 'Red' theme, then the red button's background goes red and the 'Blue' theme button's background goes white and vice versa. My problem is that I do not know how to edit another UIButton outside of the actual UIButton code. I know to edit the background color of regular UIButton you would write:
sender.backgroundColor = .red
However I am not sure how to do this outside the UIButton's code.
I have tried this:
themeCRed(sender.backgroundColor = .white)
(ThemeCRed is the button's name)
But I get the error, "Cannot convert value of type '()' to expected argument type 'UIButton'"
How can I edit the attributes of the other UIButton outside of it's function block?
If you know the intended outcome and there's few variations then forget about the sender and just set the intended uicolor to the desired uicolor
I don't sure that i understand you correct, but may be just make
#IBOutlet var myButton: UIButton!
in your ViewController or something...
and
myButton.backgroundColor = .white
hm?
You just need to identify the event of theme change and need to change the background colour of the buttons like below
yourButton.backgroundColor = UIColor.red
Related
This is a normal state of my UIButton:
But when I press on the UIButton, its highlight color should be changed to a different one. And here is what I have:
So, if you can notice, my white text becomes overlapped with the new color. But what I should have as a result is just a different color of the highlight and always the white text. Like so:
What I am doing so far is:
In Attribute Inspector in my xib file I changed the Highlight Color to a new one.
I also use updateButton.setTitleColor(.white, for: .highlighted) in my code but it doesn't help.
I've also taken a look at this question: UIButton background color overlaps text on highlight but the accepted answer didn't help much.
Similar to myButton.setTitleColor(.white, for: .normal) please try setting title colour for .highlighted state. That should work for you.
You can refer:
https://developer.apple.com/documentation/uikit/uibutton/1623993-settitlecolor
This myButton.setTitleColor(.white, for: .normal) doesnt change title color when highlighted , Its for normal state. If you want to change textColor when button is highlighted, you need to use myButton.setTitleColor(.white, for: .highlighted)
Also when you change state config in storyboard
you can set Text Color
If its a custom Button you can override isHighlighted method and do what you need like
class MyButton : UIButton {
override var isHighlighted: Bool{
didSet {
tintColor = isHighlighted ? UIColor.red : UIColor.white
backgroundColor = UIColor.blue
.....
// do what you need
}
}
As your button is subclass of UIView class CellButton: UIView {}, you need to handle touches begin and end events in custom CellButton and handle the appearance of the view. If it was subclass of UIButton then it would have handled automatically for you :)
You can also try with gestures, for more info you can refer: https://developer.apple.com/documentation/uikit/touches_presses_and_gestures/handling_uikit_gestures/handling_tap_gestures
I am working on app and I give UIButton text color from storyboard (Different for default and selected), I want both text color in a variable.
Anyone help me with this problem.
I have one solution for this problem " Take 'color code' of this color and give it to variable"
Anyone has any other short method for this problem.
Because if I use 'color code' then in future when I change color of button text then Then also work on that 'color code'.
You need to call titleColor() method of UIButton
let color = btnOutletExample.titleColor(for: .normal) or your desired state
try this
let titleColor: UIColor = yourButton.currentTitleColor
At the end of viewDidLoad, you can add the following to capture the color information:
let defaultTextColor = myButton.titleColor(for: .normal)
let selectedTextColor = myButton.titleColor(for: .selected)
You could pull the colour out of the element you configured in your storyboard, using the following code.
let btnTextColor = self.myBtnOutlet.titleLabel.titleColor(for: .normal)
I've been trying to use the appearance proxy API to apply some default colors to some controls, but I've run into a problem.
When I apply a tint color to UISegmentedControl using something like...
UISegmentedControl.appearance().tintColor = UIColor.red
It generates this...
All good, but when I add...
UIImageView.appearance().tintColor = UIColor.green
it changes to...
Just to be clear, I have BOTH this lines in my code
UISegmentedControl.appearance().tintColor = UIColor.red
UIImageView.appearance().tintColor = UIColor.green
It doesn't matter in what order I call them, the result is the same, the UIImageView properties override the UISegmentedControls
I've spent over half a day trying to find a solution to this problem but can't seem to find anything that works.
Running Xcode 8.2, iOS 10, Swift 3
What am I doing wrong and how can I fix?
I am not sure about this, but I guess, UISegmentedControl uses UIImageView to create segments, i.e. the segments we see inside segmented control are UIImageViews and not UIViews. UISegmentedControl even has methods to setImage for a particular segment.
If above is true, we can use appearanceWhenContainedIn API of UIAppearance to set image view tint colour like this:
UIImageView.appearance(whenContainedInInstancesOf: [UISegmentedControl.self]).tintColor = UIColor.red
UIImageView.appearance().tintColor = UIColor.green
Does anybody know how to give a custom text color to the circled + sign in ContactAdd button type? Before I was thinking the circled + is the actual title of the button but I was wrong.
var addButton=UIButton.buttonWithType(UIButtonType.ContactAdd) as UIButton
println("this is the current title \(addButton.currentTitle)") \\gives nil
You can use the tint color property. Something like this:
addButton.tintColor = UIColor.blueColor()
I have a custom UIButton which is a cloud, transparent black and white .png file, with no down state, just one image. When tapping and holding the finger over it, it turns dark grey. I'm trying to change that dark grey to something a little less oppressive. The button is out in the open in a view, not in a tab bar, tool bar, or navigation controller.
I've already tried setting tintColor (which the documentation helpfully informs me is only suitable for 'some' types of buttons, which no indication as to which).
I've also tried changing everything I can find in Interface Builder relating to highlight colours, default states, etc. Nothing has made a difference at all.
I've even tried setting the button's own image for its UIControlStateHighlighted state, but even this causes the dark grey overlay to appear when I hold my finger over it.
How can I change that colour? I've looked at numerous other issues here on SO and have been unable to find a solution that works for me. Any help would be greatly appreciated!
EDIT: I Solved the problem using a category of UIImage which adds a method that uses CoreGraphics to apply a tint to a provided UIImage. I then set THAT image as the highlight, and all is well. Seems a lot of hoop-la to change a colour Apple should've let us change, but c'est la vie.
You said you set a custom image for the UIControlStateHighlighted state. This should disable the default behaviour.
If you still have problems you can disable this effect by setting the adjustsImageWhenHighlighted property to NO and use whatever custom effect you want.
If adjustsImageWhenHighlighted = NO is not working,
set Button-Type to Custom (IB or programmatically).
Default Button-Type: System, changes behavior of highlighted button.
Swift 3:
myButton.adjustsImageWhenHighlighted = false
I was having a similar issue with a custom UIButton when the button was highlighting in grey every time it was pressed. I solved that problem by subclassing UIButton and in the implementation I overrode a single method, (void)setHighlighted: method and kept it empty:
- (void)setHighlighted:(BOOL)highlighted
{
// Leave empty to prevent super from doing whatever
// that it is doing to show the grey highlight.
}
That stopped any type of highlighting as I was not doing anything in the method. It's a better approach if all that you're trying to do is remove any highlighting effect.
So in your code, create a subclass of UIButton, override the setHighlighted method, and then make your custom button a subclass of this custom class.
You can write a custom button that does it
class ActionButton: UIButton {
var originalBackgroundColor: UIColor!
override var backgroundColor: UIColor? {
didSet {
if originalBackgroundColor == nil {
originalBackgroundColor = backgroundColor
}
}
}
override var isHighlighted: Bool {
didSet {
guard let originalBackgroundColor = originalBackgroundColor else {
return
}
backgroundColor = isHighlighted ? originalBackgroundColor.darken() : originalBackgroundColor
}
}