ios - 当选择 UIButton 时，文本标签上会出现一个白色框

Question

我有一个按钮，当选择该按钮时，按钮的标题文本上方会出现一个白色框。我不希望出现这个白框。查看图片。 button state unselected button state selected

如果我删除 if 语句并拥有按钮，因此只能选择但不能取消选择，则在选择时，不会出现此白框。控制它的代码如下...

@IBAction func backButtonPressed(_ sender: Any) {
        if let button = sender as? UIButton {
            if button.isSelected {
                createWorkoutButton.isEnabled = false
                backButton.backgroundColor = #colorLiteral
                backButtonPressed = false
                backButton.isSelected = false
            } else {
                createWorkoutButton.isEnabled = true
                backButton.backgroundColor = #colorLiteral
                backButtonPressed = true
                backButton.isSelected = true
            }
        }
    }

Answer 1

刚找到解决方案。添加这行代码 -

 button.tintColor = .clear

现在 -

@IBAction func backButtonPressed(_ sender: Any) {
        if let button = sender as? UIButton {
            if button.isSelected {
                createWorkoutButton.isEnabled = false
                backButton.backgroundColor = #colorLiteral
                backButtonPressed = false
                backButton.isSelected = false
                button.tintColor = .clear // Add this line of code
            } else {
                createWorkoutButton.isEnabled = true
                backButton.backgroundColor = #colorLiteral
                backButtonPressed = true
                backButton.isSelected = true
                button.tintColor = .clear
            }
        }
    }