6 个答案:

答案 0 :(得分：33)

如果您指定disabled属性，那么您为其提供的值必须为disabled。 (在HTML 5中，您可以省略除属性值之外的所有内容。在HTML 4中，您可以省略除属性名称之外的所有内容。)

如果您不想禁用该控件，则根本不要指定该属性。

禁用：

启用：

无效(但通常会恢复错误以视为已禁用)：

因此，在不知道您的模板语言的情况下，我猜您正在寻找：

答案 1 :(得分：1)

在jsp中你可以这样做：

boolean checkboxDisabled = true; //do your logic here

String checkboxState = checkboxDisabled ? "disabled" : "";

%>

>

答案 2 :(得分：1)

HTML解析器根本不解释这样的内联JavaScript。

你可以这样做：

答案 3 :(得分：1)

lazy var panGesture: UIPanGestureRecognizer = {

let pan = UIPanGestureRecognizer(target: self, action: #selector(self.handlePan(sender:)))

pan.delegate = self

return pan

}()

override func viewDidLoad() {

super.viewDidLoad()

collectionView.delegate = self

collectionView.dataSource = self

collectionView.backgroundColor = UIColor.cyan

self.view.addSubview(collectionView)

self.view.addConstraint(NSLayoutConstraint(item: collectionView, attribute: .height, relatedBy: .equal, toItem: self.view, attribute: .height, multiplier: 1.0, constant: 0.0))

collectionView.translatesAutoresizingMaskIntoConstraints = false

collectionView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true

collectionView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true

collectionView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true

collectionView.addGestureRecognizer(panGesture)

panGesture.isEnabled = false

let tap = UILongPressGestureRecognizer(target: self, action: #selector(self.handleTap(sender:)))

tap.delegate = self

collectionView.addGestureRecognizer(tap)

}

func handlePan(sender: UIPanGestureRecognizer? = nil) {

var locationOfBeganTap: CGPoint?

if sender?.state == .possible {

}

if sender?.state == .ended {

startTime = NSDate.timeIntervalSinceReferenceDate

}

}

func handleTap(sender: UIPanGestureRecognizer? = nil){

if sender?.state == .began {

panGesture.isEnabled = true

self.collectionView!.isScrollEnabled = false

}

if sender?.state == .ended {

}

}

答案 4 :(得分：-1)

根据W3Schools，您可以使用JavaScript for disabled复选框。

// Get your checkbox who determine the condition

var determine = document.getElementById("checkboxDetermine");

// Make a function who disabled or enabled your conditioned checkbox

var disableCheckboxConditioned = function () {

if(determine.checked) {

document.getElementById("checkboxConditioned").disabled = true;

}

else {

document.getElementById("checkboxConditioned").disabled = false;

}

}

// On click active your function

determine.onclick = disableCheckboxConditioned;

disableCheckboxConditioned();

答案 5 :(得分：-2)

我知道这个问题有点旧，但这是我的解决方案。

// HTML

//

//

// cb1 = checkbox 1

// cb2 = checkbox 2

var cb1 = getId('cb1'),

cb2 = getId('cb2');

function getId(id) {

return document.getElementById(id);

}

function setcb1() {

if(cb1.checked === true) {

cb2.checked = false;

cb2.disabled = "disabled"; // You have to disable the unselected checkbox

} else if(cb1.checked === false) {

cb2.disabled = ""; // Then enable it if there isn't one selected.

}

}

function setcb2() {

if(cb2.checked === true) {

cb1.checked = false;

cb1.disabled = "disabled"

} else if(cb2.checked === false) {

cb1.disabled = ""

}

希望这有帮助！