在 Xamarin.iOS 中带有填充的 UILabel? [英] UILabel with padding in Xamarin.iOS?

问题描述

我正在尝试在我的 Xamarin.iOS 应用程序中创建一个带有填充的 UILabel.原生 Objective-C 应用程序中最流行的解决方案是覆盖 drawTextInRect:

I'm trying to create a UILabel with padding in my Xamarin.iOS app. The most popular solution in native Objective-C apps is overriding drawTextInRect:

- (void)drawTextInRect:(CGRect)rect {
    UIEdgeInsets insets = {0, 5, 0, 5};
    return [super drawTextInRect:UIEdgeInsetsInsetRect(rect, insets)];
}

这看起来很简单，但我无法弄清楚如何将其转换为 C#.这是我最好的尝试:

As simple as this seems, I can't quite figure out how to translate it to C#. Here's my best stab at it:

internal class PaddedLabel : UILabel
{
    public UIEdgeInsets Insets { get; set; }

    public override void DrawText(RectangleF rect)
    {
        var padded = new RectangleF(rect.X + Insets.Left, rect.Y, rext.Width + Insets.Left + Insets.Right, rect.Height);

        base.DrawText(padded);
    }
}

这似乎会移动标签的文本，但不会调整标签的大小.

This does seem to move the label's text, but it doesn't resize the label.

我认为主要问题是我找不到 UIEdgeInsetsInsetRect 的 Xamarin 等效项.

I think the main issue is that I can't find the Xamarin equivalent of UIEdgeInsetsInsetRect.

有什么建议吗?

推荐答案

ObjC 函数 UIEdgeInsetsInsetRect 的 C# 等价物是名为 InsetRect 的 UIEdgeInsets 实例方法 并且它与您的 RectangleF 计算不同(这可能是您的问题).

The C# equivalent of the ObjC function UIEdgeInsetsInsetRect is a instance method of UIEdgeInsets named InsetRect and it's not identical to your RectangleF calculations (which is likely your problem).

要使用它，您可以:

public override void DrawText(RectangleF rect)
{
    base.DrawText (Insets.InsetRect (rect));
}

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