UITextField clearButtonMode颜色

Question

我可以在textField上更改clearButtonMode的颜色吗？

theTextField.clearButtonMode = UITextFieldViewModeWhileEditing

显示一个灰色深色的x，用于删除textField，

但是我可以用白色显示这个按钮吗？

感谢

Answer 1

在这种情况下，您需要创建自己的清除按钮图像。我建议拍一下清晰按钮的屏幕截图并在photoshop中进行编辑。

您可以拍摄该图像并使用图像尺寸创建UIButton。从那里你可以将它设置为UITextField的rightView。像这样：

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"clear_button.png"] forState:UIControlStateNormal];
[button setFrame:CGRectMake(0.0f, 0.0f, 15.0f, 15.0f)]; // Required for iOS7
theTextField.rightView = button;
theTextField.rightViewMode = UITextFieldViewModeWhileEditing;

我输入了没有语法检查的内容，但是在运行它之前你不想这样做。您还需要将clear_button.png替换为您的图像名称。

您还需要编写自己的方法来清除文本字段。

Answer 2

更简洁的方法是使用此方法在UITextField上实现类别：

- (void)modifyClearButtonWithImage:(UIImage *)image {
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setImage:image forState:UIControlStateNormal];
    [button setFrame:CGRectMake(0.0f, 0.0f, 15.0f, 15.0f)];
    [button addTarget:self action:@selector(clear:) forControlEvents:UIControlEventTouchUpInside];
    self.rightView = button;
    self.rightViewMode = UITextFieldViewModeWhileEditing;
}

-(IBAction)clear:(id)sender{
    self.text = @"";
}

Answer 3

Swift版本：

extension UITextField {

    func modifyClearButtonWithImage(image : UIImage) {
        let clearButton = UIButton(type: .Custom)
        clearButton.setImage(image, forState: .Normal)
        clearButton.frame = CGRectMake(0, 0, 40, 40)
        clearButton.contentMode = .ScaleAspectFit
        clearButton.addTarget(self, action: #selector(UITextField.clear(_:)), forControlEvents: .TouchUpInside)
        self.rightView = clearButton
        self.rightViewMode = .WhileEditing
    }

    func clear(sender : AnyObject) {
        self.text = ""
    }

}

Answer 4

Swift 4.1版本

extension UITextField {
    func modifyClearButtonWithImage(image : UIImage) {
        let clearButton = UIButton(type: .custom)
        clearButton.setImage(image, for: .normal)
        clearButton.frame = CGRect(x: 0, y: 0, width: 40, height: 40)
        clearButton.contentMode = .scaleAspectFit
        clearButton.addTarget(self, action: #selector(UITextField.clear(sender:) ), for: .touchUpInside)
        self.rightView = clearButton
        self.rightViewMode = .whileEditing
    }

    @objc func clear(sender : AnyObject) {
        self.text = ""
        sendActions(for: .editingChanged)
    }

}

Answer 5

在配置textField时，请使用：

let clearButton : UIButton = textField.value(forKey: "_clearButton") as! UIButton
let image = UIImage(named: "ClearWhite")

clearButton.setImage(image, for: .normal)
clearButton.backgroundColor = UIColor.clear