ios swift UILabel 字体大小不会以编程方式更改

Question

我想更改 UILabel 的字体大小，但它不会以编程方式更改。
当我更改文本颜色时，它会更改颜色

我尝试了很多事情，但没有成功

以下是我的代码

@IBOutlet weak var lblExample: UILabel!
override func viewDidLoad() {
        super.viewDidLoad()

        self.lblExample.font = UIFont(name: self.lblExample.font.fontName, size: 40)
        //self.lblExample.font = UIFont.systemFont(ofSize: 40)
        //self.lblExample.font = UIFont(name: "System", size: 40)
        //self.lblExample.font = self.lblExample.font.withSize(40);

        self.lblExample.textColor = UIColor.green
    }

属性检查器属性

How to change font of UILabel
why is it not changing

Answer 1

并且没有改变？

let lab = UILabel(frame: ...)
lab.font = UIFont(name: "Helvetica Fett", size: 14)
lab.font = lab.font
lab.font = UIFont.systemFont(ofSize: 14)
lab.font = UIFont.systemFont(ofSize: 14, weight: .bold)
lab.text = "TEST"