UIButton default tap fade animation missing in UIT

问题:

I have a custom cell with a few UIButtons in it. I have created Target Actions like so on the buttons:

[cell.customLocationButton addTarget:self action:@selector(customLocationButtonTap:) forControlEvents:UIControlEventTouchUpInside];

The actions work great though I don't see the default iOS fade animation on the UIButtons? Is there something I need to enable to get those too - I thought they were standard when using a UIButton from IB?

回答1:

Had the same problem. I could get the button to change color on highlight with setTitleColor:forState:, but it didn't fade from highlight to normal state like the other system buttons.

Turns out that's because my button was of type UIButtonTypeCustom. Switching it to UIButtonTypeSystem solved it for me. Please note I'm running this on iOS9.

Here's a snippet (Swift) that assumes self is a UIView or subclass:

let button = UIButton(type: .System)
button.setTitle("Title", forState: .Normal)
button.sizeToFit() // Sizes the button frame based on the title.
addSubview(button)

回答2:

I've been searching all over the internet and finally I've found a solution from a post on StackOverFlow check it out here.

For Swift 4 You can add this UIButton extension and it will work fine.

extension UIButton {

    override open func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        isHighlighted = true
        super.touchesBegan(touches, with: event)
    }

    override open func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        isHighlighted = false
        super.touchesEnded(touches, with: event)
    }

    override open func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
        isHighlighted = false
        super.touchesCancelled(touches, with: event)
    }

}

回答3:

In your XIB inside attribute inspector select your button and then inside button type you will get follow option you can select and change your button look and feel accordingly:-

回答4:

Another thing you can do is:

Swift:

button.showsTouchWhenHighlighted = true
button.setTitleColor(UIColor.blueColor(), forState: .Normal)
button.setTitleColor(UIColor.lightGrayColor(), forState: .Selected)