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我需要使用两个单选按钮来工作,一次只能单击一个按钮。使用用户Alanc Liu在这里发布的答案:Radio button in xamarin.ios我已经让我的视图控制器看起来正确了,但我无法弄清楚如何监听水龙头以将另一个单选按钮设置为false。我已经尝试在ViewDidLoad方法中添加一个手势识别器,但还没有得到任何工作(我大多只是使用以前的故事板来添加方法来按钮点击)。Xamarin.iOS中的单选按钮侦听水龙头?
我的视图控制器:
public partial class VerifyViewController : UIViewController
{
public VerifyViewController (IntPtr handle) : base (handle)
{
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
MyRadioButton tBtn = new MyRadioButton(new CGPoint(100, 300), "TEXT PHONE");
MyRadioButton eBtn = new MyRadioButton(new CGPoint(100, 375), "EMAIL");
this.Add(tBtn);
this.Add(eBtn);
}
}
他的单选按钮类:
public class MyRadioButton : UIView
{
private CircleView circleView;
private UILabel lbTitle;
public bool State {
get {
return circleView.State;
}
set {
circleView.State = value;
}
}
public MyRadioButton (CGPoint pt,string title)
{
this.Frame = new CGRect (pt, new CGSize (150, 30));
circleView = new CircleView (new CGRect(0, 0, 30, 30));
lbTitle = new UILabel (new CGRect (30, 0, 120, 30));
lbTitle.Text = title;
lbTitle.TextAlignment = UITextAlignment.Center;
this.AddSubview (circleView);
this.AddSubview (lbTitle);
this.BackgroundColor = UIColor.FromRGBA(1,0,0,0.3f);
UITapGestureRecognizer tapGR = new UITapGestureRecognizer (() => {
State = !State;
});
this.AddGestureRecognizer (tapGR);
}
}
class CircleView : UIView
{
private bool state = false;
public bool State {
get {
return state;
}
set {
state = value;
this.SetNeedsDisplay();
}
}
public CircleView (CGRect frame)
{
this.BackgroundColor = UIColor.Clear;
this.Frame = frame;
}
public override void Draw (CoreGraphics.CGRect rect)
{
CGContext con = UIGraphics.GetCurrentContext();
float padding = 5;
con.AddEllipseInRect (new CGRect (padding, padding, rect.Width - 2 * padding, rect.Height - 2 * padding));
con.StrokePath();
if (state) {
float insidePadding = 8;
con.AddEllipseInRect (new CGRect (insidePadding, insidePadding, rect.Width - 2 * insidePadding, rect.Height - 2 * insidePadding));
con.FillPath();
}
}
}