我無法更改程序創建的UILabel
中的文本大小。無法更改以編程方式創建的UILabel的文本大小
這裏有一個截屏:
這裏的類定義:
class myView: UIView {
let theLabel = UILabel()
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.theLabel.text = "Text"
self.theLabel.backgroundColor = UIColor.lightGray
self.backgroundColor = UIColor.blue
self.theLabel.adjustsFontSizeToFitWidth = true
self.theLabel.textAlignment = .center
self.theLabel.numberOfLines = 1
self.theLabel.minimumScaleFactor = 0.1
self.theLabel.font = UIFont(name: "System", size:160)
self.theLabel.translatesAutoresizingMaskIntoConstraints = false
self.addSubview(self.theLabel)
let selfAspectConstraint = NSLayoutConstraint(item: self, attribute: NSLayoutAttribute.height, relatedBy: NSLayoutRelation.equal, toItem: self, attribute: NSLayoutAttribute.width, multiplier: 1.0, constant: 0)
let labelWidthConstraint = NSLayoutConstraint(item: self.theLabel, attribute: NSLayoutAttribute.width, relatedBy: NSLayoutRelation.equal, toItem: self, attribute: NSLayoutAttribute.width, multiplier: 0.5, constant: 0)
let heightConstraint = NSLayoutConstraint(item: self.theLabel, attribute: NSLayoutAttribute.height, relatedBy: NSLayoutRelation.equal, toItem: self.theLabel, attribute: NSLayoutAttribute.width, multiplier: 0.5, constant: 0)
let xConstraint = NSLayoutConstraint(item: self.theLabel, attribute: .centerX, relatedBy: .equal, toItem: self, attribute: .centerX, multiplier: 1, constant: 0)
let yConstraint = NSLayoutConstraint(item: self.theLabel, attribute: .centerY, relatedBy: .equal, toItem: self, attribute: .centerY, multiplier: 1, constant: 0)
self.addConstraints([selfAspectConstraint,labelWidthConstraint, heightConstraint,xConstraint,yConstraint])
}
/*
// Only override draw() if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func draw(_ rect: CGRect) {
// Drawing code
}
*/
}
我試圖改變字體大小。我已將adjustsFontSizeToFitWidth
設置爲true並設置爲minimumScaleFactor
。文字大小始終相同。我希望它能夠填滿標籤區域,灰色框。
我如何得到這個工作?
,你如何創建'myView'? – aircraft
我認爲@aircraft所要求的原因是因爲你已經在init(編碼器:)而不是init(幀:)中編碼了所有內容。 IB中的 – dfd
。我添加了一個UIView並將該類設置爲myView –