问题描述
我需要更改进度条的高度,但仅针对特定的 ContentPage,而不是针对我的所有 ContentPage。我得到了更改进度条高度的代码:
public class CustomProgressBarRenderer : ProgressBarRenderer
{
protected override void OnElementChanged(
ElementChangedEventArgs<Xamarin.Forms.ProgressBar> e)
{
base.OnElementChanged(e);
Control.ProgresstintColor = Color.Fromrgb(0,0).ToUIColor();// This changes the color of the progress
}
public override void LayoutSubviews()
{
base.LayoutSubviews();
var X = 1.0f;
var Y = 10.0f; // This changes the height
CGAffineTransform transform = CGAffineTransform.MakeScale(X,Y);
Control.Transform = transform;
}
}
我想知道这是否真的可能。提前致谢。
解决方法
如果您的应用导航是:
- 基于Shell
public class CustomProgressBarRenderer : ProgressBarRenderer
{
protected override void OnElementChanged(
ElementChangedEventArgs<Xamarin.Forms.ProgressBar> e)
{
base.OnElementChanged(e);
if (Shell.Current.CurrentPage.GetType().Name.Equals("YourPageNme"))
{
Control.ProgressTintColor = Color.FromRgb(0,0).ToUIColor();
}
}
public override void LayoutSubviews()
{
base.LayoutSubviews();
if (Shell.Current.CurrentPage.GetType().Name.Equals("YourPageNme"))
{
var X = 1.0f;
var Y = 10.0f; // This changes the height
CGAffineTransform transform = CGAffineTransform.MakeScale(X,Y);
Control.Transform = transform;
}
}
}
替换
Shell.Current.CurrentPage?.GetType().Name.Equals("YourPageNme")
与
(App.Current.MainPage as NavigationPage)?.CurrentPage?.GetType().Name?.Equals("YourPageNme")