より簡単な答えがあるかもしれませんが、MonoDevelop C# 逆アセンブラーからUIAppearance
直接継承し、関連する部分UIButton
とUIButton+UIButtonAppearance
バインド実装をコピーして貼り付け、あちこちで内部フィールドを修正することになりました。
内部BackButton
:
static readonly IntPtr class_ptr = Class.GetHandle(typeof(BackButton));
public new static BackButtonAppearance Appearance
{
get {
return new BackButtonAppearance (Messaging.IntPtr_objc_msgSend (class_ptr, UIAppearance.SelectorAppearance));
}
}
public new static BackButtonAppearance AppearanceWhenContainedIn (params Type[] containers)
{
return new BackButtonAppearance (UIAppearance.GetAppearance (class_ptr, containers));
}
入れ子BackButtonAppearance
:
public class BackButtonAppearance : UIAppearance {
public BackButtonAppearance(IntPtr handle) : base(handle) { }
// These are copied from UIButton disassembly:
static readonly IntPtr selSetBackgroundImageForState_ = Selector.GetHandle ("setBackgroundImage:forState:");
static readonly IntPtr selSetTitleShadowColorForState_ = Selector.GetHandle ("setTitleShadowColor:forState:");
static readonly IntPtr selSetTitleColorForState_ = Selector.GetHandle ("setTitleColor:forState:");
// These are copied from UIButton+UIButtonAppearance disassembly,
// with internal UIButton.selSet* fields replaced by fields declared above.
[Export ("setBackgroundImage:forState:"), CompilerGenerated]
public virtual void SetBackgroundImage (UIImage image, UIControlState forState)
{
UIApplication.EnsureUIThread ();
if (this.IsDirectBinding) {
Messaging.void_objc_msgSend_IntPtr_UInt32 (base.Handle, selSetBackgroundImageForState_, (image != null) ? image.Handle : IntPtr.Zero, (uint)forState);
} else {
Messaging.void_objc_msgSendSuper_IntPtr_UInt32 (base.SuperHandle, selSetBackgroundImageForState_, (image != null) ? image.Handle : IntPtr.Zero, (uint)forState);
}
}
[Export ("setTitleColor:forState:"), CompilerGenerated]
public virtual void SetTitleColor (UIColor color, UIControlState forState)
{
UIApplication.EnsureUIThread ();
if (this.IsDirectBinding) {
Messaging.void_objc_msgSend_IntPtr_UInt32 (base.Handle, selSetTitleColorForState_, (color != null) ? color.Handle : IntPtr.Zero, (uint)forState);
} else {
Messaging.void_objc_msgSendSuper_IntPtr_UInt32 (base.SuperHandle, selSetTitleColorForState_, (color != null) ? color.Handle : IntPtr.Zero, (uint)forState);
}
}
[Export ("setTitleShadowColor:forState:"), CompilerGenerated]
public virtual void SetTitleShadowColor (UIColor color, UIControlState forState)
{
UIApplication.EnsureUIThread ();
if (this.IsDirectBinding) {
Messaging.void_objc_msgSend_IntPtr_UInt32 (base.Handle, selSetTitleShadowColorForState_, (color != null) ? color.Handle : IntPtr.Zero, (uint)forState);
} else {
Messaging.void_objc_msgSendSuper_IntPtr_UInt32 (base.SuperHandle, selSetTitleShadowColorForState_, (color != null) ? color.Handle : IntPtr.Zero, (uint)forState);
}
}
}
これにより、カスタム ビューで UIAppearance スタイルの API をサポートできるようになります。