iOS) Label에 입력되는 텍스트 중에 특정 단어의 크기나 색 바꾸기[펌]

	==========================================================================================================
	If you already know the longest word you have to get the range of that word in the string.
	I prefer the NSString method rangeOfString: for this.
	You then create a NSMutableAttributedString from the string, with your default attributes.
	Finally you apply highlighting attributes to the range you figured out earlier.
	==========================================================================================================
	let longString = "Lorem ipsum dolor. VeryLongWord ipsum foobar"
	let longestWord = "VeryLongWord"
	let longestWordRange = (longString as NSString).rangeOfString(longestWord)
	let attributedString = NSMutableAttributedString(string: longString, attributes: [NSFontAttributeName : UIFont.systemFontOfSize(20)])
	attributedString.setAttributes([NSFontAttributeName : UIFont.boldSystemFontOfSize(20), NSForegroundColorAttributeName : UIColor.redColor()], range: longestWordRange)
	label.attributedText = attributedString
	==========================================================================================================
	Update for Swift 5.0
	==========================================================================================================
	let longestWordRange = (longString as NSString).range(of: longestWord)
	let attributedString = NSMutableAttributedString(string: longString, attributes: [NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 10), NSAttributedString.Key.foregroundColor : UIColor.white])
	attributedString.setAttributes([NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 10), NSAttributedString.Key.foregroundColor : UIColor.red], range: longestWordRange)

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https://stackoverflow.com/a/29165718

ios swift: Is it possible to change the font style of a certain word in a string?