[英]UIButton does not change its state when pressed when on top of UITableView
在UITableView頂部添加UIButton時是否有其他區別? 還是我添加UIButton的代碼不正確,導致按鈕看起來好像沒有被選中
let addStudentButton = UIButton()
addStudentButton.translatesAutoresizingMaskIntoConstraints = false
let views = ["addStudentButton": addStudentButton]
var allConstraints = [NSLayoutConstraint]()
addStudentButton.setTitle("hi", for: .normal)
// addStudentButton.addTarget(self, action: #selector(StudentsViewController.addStudent), for: UIControlEvents.touchUpInside)
addStudentButton.titleLabel?.font = UIFont.systemFont(ofSize: 20.0)
addStudentButton.setTitleColor(UIColor.flatWhite(), for: .normal)
addStudentButton.setTitleColor(UIColor.flatWhite(), for: .selected)
addStudentButton.layer.backgroundColor = UIColor.flatForestGreen().cgColor
addStudentButton.layer.shadowRadius = 4.0
addStudentButton.layer.shadowOpacity = 0.8
addStudentButton.layer.shadowOffset = CGSize(width: 0, height: 1)
allConstraints += NSLayoutConstraint.constraints(withVisualFormat: "H:[addStudentButton(>=44)]", options: [], metrics: nil, views: views)
allConstraints += NSLayoutConstraint.constraints(withVisualFormat: "V:[addStudentButton(>=44)]", options: [], metrics: nil, views: views)
NSLayoutConstraint.activate(allConstraints)
studentsTableView.addSubview(addStudentButton)
addStudentButton.bottomAnchor.constraint(equalTo: view.layoutMarginsGuide.bottomAnchor, constant: -8.0).isActive = true
addStudentButton.rightAnchor.constraint(equalTo: view.layoutMarginsGuide.rightAnchor, constant: 0.0).isActive = true
我基本上有一個列出學生的UITableView,我想要一個位於屏幕右下角的按鈕,該按鈕位於可以選擇的UITableView頂部。 該按鈕看起來不錯,直到我按下它為止,然后它再也沒有看到文本更改顏色和填充物的所選外觀。
問題是:
let addStudentButton = UIButton()
創建一個.custom
按鈕,該按鈕在點擊時不會自動更改
您的標題顏色在所有州都是相同的,因此專門可以防止標題顏色發生任何變化
輕擊的按鈕突出顯示,未選中
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