内容简介:Swift iOS : RichText
我们常常看到简单平实的文本显示,然后确实可以通过RichText来完成丰富文本的外观,增强界面的表达力。
UILabel等组件,除了text属性外,还有attributedText属性,通过构建NSAttributedString的实例,并赋值给此属性,就可以设置RichText了。下面是一个趁手的案例:
import UIKit @UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate { var window : UIWindow? func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool { window = UIWindow() let nav = UINavigationController() window!.rootViewController = Page() nav.pushViewController(HomeViewController(), animated: true) window!.rootViewController!.view.backgroundColor = .blue window!.makeKeyAndVisible() return true } } class Page :UIViewController{ override func viewDidLoad() { let label = UILabel() label.backgroundColor = .red let attrStr = try! NSAttributedString( data: "<b><i>text</i></b>".data(using: String.Encoding.unicode, allowLossyConversion: true)!, options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil) label.attributedText = attrStr label.frame = CGRect(x:0,y:100,width:100,height:20) view.addSubview(label) let text = UITextView() let attr2 = [NSFontAttributeName: UIFont.preferredFont(forTextStyle: UIFontTextStyle.headline), NSForegroundColorAttributeName: UIColor.purple] let titleString = NSAttributedString(string: "Read all about it!", attributes: attr2) text.attributedText = titleString text.frame = CGRect(x:0,y:200,width:100,height:200) view.addSubview(text) } }
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Sas Jacobs / Apress / 2006-06-05 / USD 39.99
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