自动更改字体大小以适应swift中的按钮

Question

我试过这个,但它不起作用,文本超出按钮边界.

button.titleLabel!.adjustsFontSizeToFitWidth = true
button.titleLabel!.numberOfLines = 0
button.titleLabel!.minimumScaleFactor = 0.1

当我尝试以下操作时,所有文本都适合,但文本仍然是小字体:

button.titleLabel!.font = UIFont(name: "Heiti TC", size: 9)

如何让字体自动适合按钮的大小？

 func nextQuestion() {

    let currentQuestion = mcArray![questionIdx]

    answers = currentQuestion["Answers"] as! [String]
    correctAnswer = currentQuestion["CorrectAnswer"] as? String
    question = currentQuestion["Question"] as? String

    titlesForButtons()
}

func titlesForButtons() {
    for (idx,button) in answerButtons.enumerate() {
        button.titleLabel!.lineBreakMode = .ByWordWrapping

        button.titleLabel!.font = UIFont(name: "Heiti TC", size: 5)

        button.titleLabel!.numberOfLines = 0

        button.titleLabel!.minimumScaleFactor = 0.1

        button.titleLabel!.baselineAdjustment = .AlignCenters

        button.titleLabel!.textAlignment  = NSTextAlignment.Center

        button.setTitle(answers[idx], forState: .Normal)
        button.enabled = true
        button.backgroundColor = UIColor(red: 83.0/255.0, green: 184.0/255.0, blue: 224.0/255.0, alpha: 1.0)
    }

    questionLabel.text = question
    startTimer()
}

这是我到目前为止的代码,它从plist文件中获取答案

Answer 1

你可以试试这个：

1.根据按钮当前的字体大小定义标题大小

let nsTitle = NSString(string:"yourButtonTitle")
let font = button.titleLabel?.font
let titleSize = nsTitle.sizeWithAttributes([NSFontAttributeName:font])

2.检查您的标题是否符合按钮标题标签：

if titleSize.width > button.titleLabel?.bounds.width{

    //set the appropriate font size

}else{

    //set the appropriate font size or do nothing
}