将TextField绑定到Xamarin.Forms中的Int属性

<TextField Text="{Binding MyIntProperty}" />

private int myIntProperty;
public int MyIntProperty
{
    get { return myIntProperty; }
    set
    {
        if (myIntProperty != value)
        {
            myIntProperty = value;
            OnPropertyChanged(nameof(MyIntProperty));
        }
    }
}

public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName)
{
    PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}

public MyPage()
{
    InitializeComponent();
    BindingContext = new MyViewModel();
}