在這里，我可以附上我在滾動時遇到的問題的螢屏截圖，我想隱藏更多按鈕或將該按鈕作為第二個按鈕放入導航欄中，但它會覆寫到第一個。
我通過簡單地呼叫此函式將按鈕設定為加載。
func setUpNavigationMoreButton() {
let rightButton = UIButton()
let btnFilterImage = #imageLiteral(resourceName: "DotsThreeOutline")
rightButton.setImage(btnFilterImage, for: .normal)
rightButton.setTitleColor(.purple, for: .normal)
rightButton.addTarget(self, action: #selector(filterClick), for: .touchUpInside)
navigationController?.navigationBar.addSubview(rightButton)
rightButton.tag = 1
rightButton.frame = CGRect(x: self.view.frame.width, y: 0, width: 30, height: 30)
let targetView = self.navigationController?.navigationBar
let trailingContraint = NSLayoutConstraint(item: rightButton, attribute:
.trailingMargin, relatedBy: .equal, toItem: targetView,
attribute: .trailingMargin, multiplier: 1.0, constant: -16)
let bottomConstraint = NSLayoutConstraint(item: rightButton, attribute: .bottom, relatedBy: .equal,
toItem: targetView, attribute: .bottom, multiplier: 1.0, constant: -6)
rightButton.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([trailingContraint, bottomConstraint])
}
uj5u.com熱心網友回復：
您必須使用UIBarButtonItem而不是 UIButton。
let btnFilterImage = #imageLiteral(resourceName: "DotsThreeOutline")
let rightButton = UIBarButtonItem(image: btnFilterImage, style: .plain, target: self, action: #selector(filterClick))
navigationController?.navigationItem.rightBarButtonItem = rightButton
如果您有多個按鈕
let rightButton1 = UIBarButtonItem(image: image1, style: .plain, target: self, action: #selector(filterClick))
let rightButton2 = UIBarButtonItem(image: image2, style: .plain, target: self, action: #selector(filterClick))
navigationController?.navigationItem.rightBarButtonItems = [rightButton1, rightButton2]
uj5u.com熱心網友回復：
如果您需要在大標題更改時隱藏/取消隱藏更多按鈕。
class VController: UIViewController {
let rightButton = UIButton()
var observer: NSKeyValueObservation?
override func viewDidLoad() {
super.viewDidLoad()
self.observer = self.navigationController?.navigationBar.observe(\.bounds, options: [.new], changeHandler: { (navigationBar, changes) in
if let height = changes.newValue?.height {
if height > 44.0 {
//Large Title, unhide button
rightButton.isHidden = false
} else {
//Small Title, hide button
rightButton.isHidden = true
}
}
})
}
}
轉載請註明出處，本文鏈接：https://www.uj5u.com/ruanti/477155.html