Tutorial Sheet (incl. Welcome message + Recordings introduction)

main/Common Classes/QuickUI.swift

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+import UIKit
+
+struct QuickUI {
+	
+	static func button(_ title: String, target: Any? = nil, action: Selector? = nil) -> UIButton {
+		let x = UIButton(type: .roundedRect)
+		x.setTitle(title, for: .normal)
+		x.titleLabel?.font = .preferredFont(forTextStyle: .body)
+		x.sizeToFit()
+		if let a = action { x.addTarget(target, action: a, for: .touchUpInside) }
+		if #available(iOS 10.0, *) {
+			x.titleLabel?.adjustsFontForContentSizeCategory = true
+		}
+		return x
+	}
+	
+	static func image(_ img: UIImage?, frame: CGRect = CGRect.zero) -> UIImageView {
+		let x = UIImageView(frame: frame)
+		x.contentMode = .scaleAspectFit
+		x.image = img
+		return x
+	}
+	
+	static func text(_ str: String, frame: CGRect = CGRect.zero) -> UITextView {
+		let x = UITextView(frame: frame)
+		x.font = .preferredFont(forTextStyle: .body) // .systemFont(ofSize: UIFont.systemFontSize)
+		x.isSelectable = false
+		x.isEditable = false
+		x.text = str
+		if #available(iOS 10.0, *) {
+			x.adjustsFontForContentSizeCategory = true
+		}
+		return x
+	}
+	
+	static func text(attributed: NSAttributedString, frame: CGRect = CGRect.zero) -> UITextView {
+		let txt = self.text("", frame: frame)
+		txt.attributedText = attributed
+		return txt
+	}
+}
+
+extension NSMutableAttributedString {
+	static private var def: UIFont = .preferredFont(forTextStyle: .body)
+	
+	func normal(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: .preferredFont(forTextStyle: style)) }
+	func bold(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).bold()) }
+	func italic(_ str: String, _ style: UIFont.TextStyle = .body) -> Self { append(str, withFont: UIFont.preferredFont(forTextStyle: style).italic()) }
+	
+	func h1(_ str: String) -> Self { normal(str, .title1) }
+	func h2(_ str: String) -> Self { normal(str, .title2) }
+	func h3(_ str: String) -> Self { normal(str, .title3) }
+	
+	private func append(_ str: String, withFont: UIFont) -> Self {
+		append(NSAttributedString(string: str, attributes: [.font : withFont]))
+		return self
+	}
+}
+
+
+extension UIFont {
+	func withTraits(traits: UIFontDescriptor.SymbolicTraits) -> UIFont {
+		UIFont(descriptor: fontDescriptor.withSymbolicTraits(traits)!, size: 0) // keep size as is
+    }
+    func bold() -> UIFont { withTraits(traits: .traitBold) }
+    func italic() -> UIFont { withTraits(traits: .traitItalic) }
+}