Is there any way to programmatically add a button that will run an action when its clicked? What code would be used?
I am new to swift and the new languages, I am used to just adding a button in the storyboard and running an IBAction from there.
Add a comment
|
2 Answers
You can use a SPSprintNode as your button and activate it in the touches function. Or you can use a button class to do the work for you. If your using ObjectiveC, there are some great button class examples on Github. If your using Swift they are a little harder to find. The third and last option is you can use a label and then tell touches to call the button function. Here is an example:
var button = SKSpriteNode(imageNamed: "button.png")
button.position = CGPoint(x: self.size.width * 0.5, y: self.size.height * 0.5)//center
button.alpha = 1.0//optional
addChild(button)
Then in your Touches Begin put this:
for touch in touches {
let touchLocation = touch.locationInNode(self)
if (CGRectContainsPoint(button.frame, touchLocation)) {
button.alpha = 0.5//optional
//call function to perform something here.
}
}
Comments
The other answer uses SpriteKit, if you're not using it, this is how you would do it:
In your UIViewController subclass:
func whateverFuncYouWantLikeViewDidLoad() {
let button = UIButton(frame: CGRect(x: <#x#>, y: <#y#>, width: <#w#>, height: <#h#>)
button.addTarget(self, "someSelector", .TouchUpInside)
addSubview(button)
}
func someSelector() {
println("that tickles!")
}
