使用动态文字填充UITableViewCell内容时，需要计算文字占用高度，以便告知UITableViewCell的行高。使用YYText的YYTextLayout可以帮助做到这点。

如下案例，简单封装了YYTextLayout，并通过两个案例调用，演示它的做法：

import UIKitimport YYText@UIApplicationMainclass AppDelegate: UIResponder, UIApplicationDelegate {    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {        let a = "I'm trying to import myFramework into a project. I've added ... If I get you correctly you don't have a separate build target for your framework (you"        print(Foo.OccupyHigh(a,UIScreen.main.bounds.size.width - 24))        print(Foo.OccupyHigh(a+a,UIScreen.main.bounds.size.width - 24))        return true    }}class Foo {    class func getYYLayout(_ title : String?)->YYTextLayout?{        return getYYLayout(title,UIScreen.main.bounds.size.width - 24)    }    class func getYYLayout(_ title : String?, _ width : CGFloat)->YYTextLayout?{        var topicTitleAttributedString: NSMutableAttributedString?        var topicTitleLayout: YYTextLayout?        let r :CGFloat = 15.0        let g :CGFloat = 15.0        let b :CGFloat = 15.0        topicTitleAttributedString = NSMutableAttributedString(string: title!,                                                               attributes: [                                                                NSFontAttributeName:v2Font(17),                                                                NSForegroundColorAttributeName:UIColor(red: r/255.0, green: g/255.0, blue: b/255.0, alpha: 255),                                                                ])        topicTitleAttributedString?.yy_lineSpacing = 3        topicTitleLayout = YYTextLayout(containerSize: CGSize(width: width, height: 9999), text: topicTitleAttributedString!)        return topicTitleLayout    }    class func OccupyHigh(_ title : String, _ width : CGFloat) -> CGFloat{        let topicTitleLayout = getYYLayout(title,width)        return topicTitleLayout?.textBoundingRect.size.height ?? 0    }}复制代码

核心为OccupyHigh函数，告诉它文字的内容和希望的宽度，就可以得到它的占用高度。