我正在使用两种受支持的语言（即英语和阿拉伯语）开发Xamarin.iOS应用程序。我想使用自定义的后退按钮。该按钮位于导航栏中，但是它有一些我想摆脱的多余空间。
下面是我用来添加按钮的代码
var leftBarButton = new UIBarButtonItem(UIImage.FromBundle("IcArrowLeft.png"), UIBarButtonItemStyle.Plain, (s, e) =>
{
DismissViewController(true, null);
});
请参考以下结果截图。我要摆脱以红色标记的空间
下面是我用作后退图标的图像
最佳答案
您可以根据需要创建自定义navigationBar。
public class xxxViewController: UIViewController
{
public override void ViewWillAppear(bool animated)
{
base.ViewWillAppear(animated);
NavigationController.NavigationBar.Hidden = true;
double height = IsiphoneX();
UIView backView = new UIView()
{
BackgroundColor = UIColor.White,
Frame = new CGRect(0,20,UIScreen.MainScreen.Bounds.Width, height),
};
UIButton backBtn = new UIButton() {
Frame = new CGRect(20, height-44, 40, 44),
Font = UIFont.SystemFontOfSize(18),
} ;
backBtn.SetBackgroundImage(UIImage.FromBundle("IcArrowLeft.png"),UIControlState.Normal);
backBtn.ImageEdgeInsets = new UIEdgeInsets(0, -10, 0, 0);
backBtn.TouchUpInside += BackButton_TouchUpInside;
UILabel titleLabel = new UILabel() {
Frame=new CGRect(UIScreen.MainScreen.Bounds.Width/2-75, 0,150, height),
Font = UIFont.SystemFontOfSize(20),
Text = "xxx",
TextColor = UIColor.Black,
Lines = 0,
};
UILabel line = new UILabel() {
Frame = new CGRect(0, height, UIScreen.MainScreen.Bounds.Width, 0.5),
BackgroundColor = UIColor.Black,
};
backView.AddSubview(backBtn);
backView.AddSubview(titleLabel);
backView.AddSubview(line);
View.AddSubview(backView);
}
double IsiphoneX()
{
double height = 44;
if (UIDevice.CurrentDevice.CheckSystemVersion(11, 0))
{
if (UIApplication.SharedApplication.Delegate.GetWindow().SafeAreaInsets.Bottom > 0.0)
{
height = 64;
}
}
return height;
}
private void BackButton_TouchUpInside(object sender, EventArgs e)
{
DismissViewController(true, null);
}
public override void ViewWillDisappear(bool animated)
{
base.ViewWillDisappear(animated);
NavigationController.NavigationBar.Hidden = false;
}
}
您可以根据需要设置title，backButton和navigationBar的属性（例如text，color，BackgroundColor，font等）
关于ios - 自定义后退按钮具有多余的多余空间，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/57657484/