如果TextField为空，如何禁用按钮? [英] How to disable button if the TextField empty?

问题描述

我无法禁用我的按钮.在下面的代码中， accept 是 Button ，而 email 是> TextField .

I can't disable my button. In the below code, accept is a Button and email is a TextField.

email.setOnAction(ae -> {
    if(!email.getText().isEmpty()) {
        accept.setDisable(false);
    } else
        accept.setDisable(true);
});

如果我在文本字段中写，它什么也没做.

It doesn't do anything if I write in the text field.

推荐答案

按照Zephyr的回答，您可以将其直接绑定到您的按钮内:

Following Zephyr's answer, you can directly bind it inside your button:

button1.disableProperty().bind(Bindings.isEmpty(textField1.textProperty()));

或者如果您想在多个文本字段为空时禁用按钮:

Or if you want to disable a button when multiple text fields are empty:

button1.disableProperty().bind(
    Bindings.isEmpty(textField1.textProperty())
        .or(Bindings.isEmpty(textField2.textProperty()))
        .or(Bindings.isEmpty(textField3.textProperty()))
);

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