进入显示和隐藏密码 [英] Entry show and hide password

问题描述

我希望条目在占位符之前有一个图标，在条目末尾有一个图标，以显示和隐藏条目中的文本，我使用本教程有一个带有显示和隐藏图标的条目:

I want an entry to have an icon before the placeholder, and a icon in the end of the entry, to show and hide the text in the entry, i had an entry with the show and hide icon using this tutorial: https://www.techierathore.com/2017/09/xamarin-forms-tip-implement-show-hide-password-using-effects/

But now I want to have icons before the entry too, I can do that with this tutorial: https://xamgirl.com/image-entry-in-xamarin-forms/

But if i add the effect of the first tutorial to the custom entry, only the and hide/show icon shows up.

Is possible to do what i want?

解决方案

You could use editText.SetCompoundDrawablesRelativeWithIntrinsicBounds() to add both icon.

SetCompoundDrawablesRelativeWithIntrinsicBounds takes four parameters for start, top, end, and bottom drawable. In the first tutorial, the hide/show icon is added to the end, you can change the first parameter from 0 to your drawable. There are three places need to modify.

For example:

public class ShowHidePassEffect : PlatformEffect
{
    protected override void OnAttached()
    {
        ConfigureControl();
    }

    protected override void OnDetached()
    {
    }

    private void ConfigureControl()
    {
        EditText editText = ((EditText)Control);
        editText.SetCompoundDrawablesRelativeWithIntrinsicBounds(Resource.Drawable.Password, 0, Resource.Drawable.ShowPass, 0);
        editText.SetOnTouchListener(new OnDrawableTouchListener());
    }
}

public class OnDrawableTouchListener : Java.Lang.Object, Android.Views.View.IOnTouchListener
{
    public bool OnTouch(Android.Views.View v, MotionEvent e)
    {
        if (v is EditText && e.Action == MotionEventActions.Up)
        {
            EditText editText = (EditText)v;
            if (e.RawX >= (editText.Right - editText.GetCompoundDrawables()[2].Bounds.Width()))
            {
                if (editText.TransformationMethod == null)
                {
                    editText.TransformationMethod = PasswordTransformationMethod.Instance;
                    editText.SetCompoundDrawablesRelativeWithIntrinsicBounds(Resource.Drawable.Password, 0, Resource.Drawable.ShowPass, 0);
                }
                else
                {
                    editText.TransformationMethod = null;
                    editText.SetCompoundDrawablesRelativeWithIntrinsicBounds(Resource.Drawable.Password, 0, Resource.Drawable.HidePass, 0);
                }
                return true;
            }
        }
        return false;
    }
}

And the result is:

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