Xamarin iOS global styles - xamarin

Question

I'm developing Xamarin iOS app.
Is it possible to create global styles (e.g. for buttons) in Xamarin iOS apps like in Xamarin Android apps?
Any ideas?

Answer 1

Apple provides Appearance API that you could use for this purpose.
There is a nice article about it on official Xamarin developer portal.
The idea behind it is that you could use static methods on the controls to set a desired appearance, for example:
UIButton.Appearance.TintColor = UIColor.LightGray;
UIButton.Appearance.SetTitleColor(UIColor.FromRGB(0,127,14), UIControlState.Normal);

Answer 2

Create a control set common theme in that.
For example
public class CustomTextField : UITextField
{
public UIView RightViewEnabled
{
get;
set;
}
public UIView RightViewDisabled
{
get;
set;
}
public override CoreGraphics.CGRect LeftViewRect(CoreGraphics.CGRect forBounds)
{
var rect = base.LeftViewRect(forBounds);
rect.X += 10;
//rect.Y -= 2;
return rect;
}
public override CoreGraphics.CGRect RightViewRect(CoreGraphics.CGRect forBounds)
{
var rect = base.RightViewRect(forBounds);
rect.X -= 10;
return rect;
}
public override CoreGraphics.CGRect TextRect(CoreGraphics.CGRect forBounds)
{
var rect = base.TextRect(forBounds);
if (LeftView != null)
rect.X += 5;
if (RightView != null)
rect.Width -= 10;
return rect;
}
public override CoreGraphics.CGRect EditingRect(CoreGraphics.CGRect forBounds)
{
var rect = base.EditingRect(forBounds);
if (LeftView != null)
rect.X += 5;
//if (RightView != null)
// rect.X -= 10;
return rect;
}
public override bool Enabled
{
get
{
return base.Enabled;
}
set
{
base.Enabled = value;
if (value)
{
if (RightViewEnabled != null)
RightView = RightViewEnabled;
base.TextColor = _textColor;
}
else
{
if (RightViewDisabled != null)
RightView = RightViewDisabled;
if (TextColorDisabled != null)
base.TextColor = TextColorDisabled;
}
}
}
public UIColor TextColorDisabled
{
get;
set;
}
private UIColor _textColor;
public override UIColor TextColor
{
get
{
return base.TextColor;
}
set
{
_textColor = value;
base.TextColor = value;
}
}
public Guid ValueId
{
get;
set;
}
public override bool CanPerform(ObjCRuntime.Selector action, Foundation.NSObject withSender)
{
if (action == new Selector("paste:") || action == new Selector("cut:") || action == new Selector("copy:")
|| action == new Selector("select:") || action == new Selector("selectAll:") || action == new Selector("delete:") || action == new Selector("_promptForReplace:")
|| action == new Selector("_transliterateChinese:") || action == new Selector("_showTextStyleOptions:") || action == new Selector("_define:") || action == new Selector("_addShortcut:")
|| action == new Selector("_accessibilitySpeak:") || action == new Selector("_accessibilitySpeakLanguageSelection:") || action == new Selector("_accessibilityPauseSpeaking:") || action == new Selector("makeTextWritingDirectionRightToLeft:")
|| action == new Selector("makeTextWritingDirectionLeftToRight:") || action == new Selector("_share:"))
return false;
else
return base.CanPerform(action, withSender);
}
}