如何让.adjustsFontSizeToFitWidth正常运行

Pau*_* S. 5 uilabel swift xcode6

使用这个简单的代码,我假设"Hello World!"自动收缩会起作用,bannerLabel.adjustsFontSizeToFitWidth但文本的末尾会被剪切,...如何让它正常工作?

import UIKit

class ViewController: UIViewController, UIGestureRecognizerDelegate {

    @IBOutlet weak var bannerLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        bannerLabel.adjustsFontSizeToFitWidth = true
        bannerLabel.numberOfLines = 1
        bannerLabel.text = "Hello World!"
        bannerLabel.font = UIFont(name: bannerLabel.font.fontName, size: 150)!

    }
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小智 6

titleLabel?.numberOfLines = 1 

titleLabel?.adjustsFontSizeToFitWidth = true

titleLabel?minimumScaleFactor = 0.1
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