我见过几个这样的问题,但没有太多帮助。
我正在 View Controller 中使用自定义类创建一个带有边缘插入的 UILabel,如下所示 var message = InsetLabel()
。在 viewDidLoad
中,我正在自定义标签以包裹文本,但它似乎不起作用。我哪里出错了?
我没有得到全文,如下图所示:
class InsetLabel: UILabel {
override func drawText(in rect: CGRect) {
super.drawText(in: UIEdgeInsetsInsetRect(rect, UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)))
}
}
class ViewController: UIViewController {
var messageHeading = UILabel()
var message = InsetLabel()
var messageText = "Your profile is currently going through the approval process, You will be notified as soon as it has been appproved."
override func viewDidLoad() {
super.viewDidLoad()
messageHeading.text = "APPROVAL STATUS"
messageHeading.textColor = Colors.darkGrey
messageHeading.textAlignment = .left
message.text = messageText
message.textColor = Colors.darkGrey
message.textAlignment = .left
message.lineBreakMode = .byWordWrapping
message.numberOfLines = 10
message.backgroundColor = Colors.white
message.sizeToFit()
view.addSubview(messageHeading)
view.addSubview(message)
messageHeading.translatesAutoresizingMaskIntoConstraints = false
message.translatesAutoresizingMaskIntoConstraints = false
let views = ["messageHeading" : messageHeading,
"message" : message
]
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-20-[messageHeading]", options: [], metrics: nil, views: views))
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-10-[messageHeading]-10-|", options: [], metrics: nil, views: views))
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:[messageHeading]-10-[message]", options: [], metrics: nil, views: views))
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|[message]|", options: [], metrics: nil, views: views))
}
}
最佳答案
更改您的自定义标签类别
class InsetLabel: UILabel {
override func drawText(in rect: CGRect) {
super.drawText(in: rect)
// super.drawText(in: UIEdgeInsetsInsetRect(rect, UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)))
}
}
然后添加如下约束:
let msgHeadVerticalConst = NSLayoutConstraint.constraints(withVisualFormat: "V:|-20-[messageHeading(>=20)]", options: [], metrics: nil, views: views)
let msgHeadHorizontalConst = NSLayoutConstraint.constraints(withVisualFormat: "H:|-10-[messageHeading]-10-|", options: [], metrics: nil, views: views)
let msgVerticalConst = NSLayoutConstraint.constraints(withVisualFormat: "V:[messageHeading]-10-[message(>=20)]", options: [], metrics: nil, views: views)
let msgHorizontalConst = NSLayoutConstraint.constraints(withVisualFormat: "H:|-10-[message]-10-|", options: [], metrics: nil, views: views)
NSLayoutConstraint.activate(msgHeadVerticalConst + msgHeadHorizontalConst + msgVerticalConst + msgHorizontalConst)
关于ios - 无法在 UILabel、Swift 中换行文本,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45557681/