Setting up color scheme for all types of controls

fmrock164

I am building my first xamarian IOS app. The requirements are it has to have a black background, white labels. Text boxes have to be dark with a blue border.

I can set each form item individually, but these seems like the wrong approach. In my ViewDidLoad I am using the following code to change some of the display properties, but some like border color, text color seem to be missing or have to bet set differently. How would I set all the UITextFields borders, text color, and the same for a UITextView?

            DepartureMessageView.Layer.BackgroundColor = UIColor.Black.CGColor;

            UIButton.Appearance.TintColor = UIColor.White;
            UIButton.Appearance.SetTitleColor(UIColor.White, UIControlState.Normal);
            UIButton.Appearance.BackgroundColor = UIColor.Blue;

            UILabel.Appearance.BackgroundColor = UIColor.Black;
            UILabel.Appearance.TextColor = UIColor.White;

            UITextField.Appearance.BackgroundColor = UIColor.Black;

ColeX

text color

There are some missing UIAppearance features in Xamarin.iOS , such as TextColor in UITextField.UITextFieldAppearance.
You have to write your own implementation , use objc_msgSend to achieve the missing method.

Refer https://stackoverflow.com/a/48270208/8187800

border color

UIAppearance doesn't support on layers , it's impossible to change border with it .

Refer https://stackoverflow.com/a/27404417/8187800

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I suggest you subclass UITextField and customize these properties ,then use the new class in your project .

fmrock164

Unless there is an easier way to apply a dark theme to the full app?

ColeX

text color

There are some missing UIAppearance features in Xamarin.iOS , such as TextColor in UITextField.UITextFieldAppearance.
You have to write your own implementation , use objc_msgSend to achieve the missing method.

Refer https://stackoverflow.com/a/48270208/8187800

border color

UIAppearance doesn't support on layers , it's impossible to change border with it .

Refer https://stackoverflow.com/a/27404417/8187800

---

I suggest you subclass UITextField and customize these properties ,then use the new class in your project .