MvvmCross Tibet绑定至ViewModel自身的技术问询

Great question! I’ve worked with Tibet Binding in similar UITableViewCell scenarios, and the good news is it does support binding to the root ViewModel itself, just like XAML’s . syntax. Here’s how to implement it smoothly:

1. Recommended Syntax: Using $self #

Tibet Binding provides the $self special keyword to explicitly reference the root binding context (your full ViewModel instance). This is the clearest approach, avoiding any confusion with nested properties in complex ViewModels.

Example Code #

For your scenario where you need the converter to receive the entire ViewModel to generate attributed text, your Tibet Binding would look like this:

Bind.Attached(this.MyLabel)
    .For(v => v.AttributedText)
    .To("$self")
    .WithConverter<MyLabelConverter>();

2. Shorthand Options: Empty Path or . #

In most recent Tibet Binding versions, you can also use shorthand syntax that mirrors XAML:

• An empty binding path resolves directly to the root context
• The . character works identically to XAML’s self-binding

Here’s how those look in code:

// Shorthand with empty path
Bind.Attached(this.MyLabel)
    .For(v => v.AttributedText)
    .To("")
    .WithConverter<MyLabelConverter>();

// Using '.' (matches XAML's syntax)
Bind.Attached(this.MyLabel)
    .For(v => v.AttributedText)
    .To(".")
    .WithConverter<MyLabelConverter>();

3. Key Notes #

• Converter Compatibility: Your existing MyLabelConverter will work exactly as it did with Fluent Binding—no modifications needed, since it still receives the full ViewModel instance as input.
• Clarity vs. Shorthand: While the shorthand options work, $self is more explicit, which helps with readability in larger codebases or for developers new to Tibet Binding.
• Version Check: If you’re using an older Tibet Binding release, confirm it supports $self (all recent stable versions do, but it’s worth verifying if you hit unexpected issues).

内容的提问来源于stack exchange，提问作者fonix232