使用图像作为UIButtons背景以编程方式创建复选框

let checkboxButton = UIButton(type: .custom)

let checkedImage = UIImage(named: "checkbox_checked")
let uncheckedImage = UIImage(named: "checkbox_unchecked")
checkboxButton.setBackgroundImage(uncheckedImage, for: .normal)
checkboxButton.setBackgroundImage(checkedImage, for: .selected)

checkboxButton.isSelected = false

checkboxButton.addTarget(self, action: #selector(checkboxButtonTapped), for: .touchUpInside)

@objc func checkboxButtonTapped() {
    checkboxButton.isSelected = !checkboxButton.isSelected
    checkboxButton.setBackgroundImage(checkboxButton.isSelected ? checkedImage : uncheckedImage, for: .normal)
}