我有一个放在底部(正确)的工具栏。问题是按钮(在UIBarButtonItem上)位于整个工具栏的中心。
如何将此按钮放在侧面,但仍然(垂直)居中于图像? 这是最好的保证金。
所以它看起来像
-------------- |. X |. label --------------
代码是:
let customButton: UIButton = UIButton(type: .custom)
customButton.setImage(UIImage(named: "start"), for: .normal)
customButton.setTitle("Start", for: .normal)
customButton.titleLabel?.font = UIFont.boldSystemFont(ofSize: 12)
customButton.setTitleColor(UIColor.white, for: .normal)
customButton.sizeToFit()
customButton.centerLabelVerticallyWithPadding(spacing: 5)
customButton.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(startButtonAction(_:))))
iconBar.items = [UIBarButtonItem(customView: customButton)]
其中iconBar
- 工具栏定义为:
let iconBar: UIToolbar =
{
let view = UIToolbar()
view.translatesAutoresizingMaskIntoConstraints = false
view.barTintColor = UIColor.black
return view
}()
此外,我正在使用扩展来居中UIButton,然后我可以在它上面添加一个图像(也是居中)。这是扩展名:
extension UIButton
{
func centerLabelVerticallyWithPadding(spacing:CGFloat)
{
// update positioning of image and title
let imageSize = self.imageView!.frame.size
self.titleEdgeInsets = UIEdgeInsets(top:0,
left:-imageSize.width,
bottom:-(imageSize.height + spacing),
right:0)
let titleSize = self.titleLabel!.frame.size
self.imageEdgeInsets = UIEdgeInsets(top:-(titleSize.height + spacing),
left:0,
bottom: 0,
right:-titleSize.width)
// reset contentInset, so intrinsicContentSize() is still accurate
let trueContentSize = self.titleLabel!.frame.union(self.imageView!.frame).size
let oldContentSize = self.intrinsicContentSize
let heightDelta = trueContentSize.height - oldContentSize.height
let widthDelta = trueContentSize.width - oldContentSize.width
self.contentEdgeInsets = UIEdgeInsets(top:heightDelta/2.0,
left:widthDelta/2.0,
bottom:heightDelta/2.0,
right:widthDelta/2.0)
}
}
答案 0 :(得分:0)
您是否正在寻找灵活的空格键按钮项目'或者'固定空格键按钮项目'?然后你可以在工具栏的左右两侧添加一点空间并定义它的大小。
看起来像这样:
let spacer = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)
spacer.width = 10