想要实现：
即，label文字的上下和左右，都和边框间距8px＝4point
swift uilabel text padding
ios – Adding space/padding to a UILabel (Swift) – Stack Overflow
How do you add inset to UILabel (iOS Swift)? – Stack Overflow
ios – Inset text in UILabel from left – Stack Overflow
最后换成TextView，然后加上textContainerInset即可：
self.systemNoticeTextView = UITextView() self.systemNoticeTextView.text = notifMsg.notice self.systemNoticeTextView.textAlignment = NSTextAlignment.Left self.systemNoticeTextView.textColor = ColorSystemNoticeText self.systemNoticeTextView.font = FontSystemNotice self.systemNoticeTextView.backgroundColor = ColorSystemNoticeBackground self.systemNoticeTextView.layer.borderWidth = 1 self.systemNoticeTextView.layer.borderColor = ColorSystemNoticeBackground.CGColor self.systemNoticeTextView.layer.cornerRadius = 2 self.systemNoticeTextView.editable = false self.systemNoticeTextView.selectable = false self.systemNoticeTextView.scrollEnabled = false self.systemNoticeTextView.textContainerInset = InsetSystemNotice self.contentView.addSubview(self.systemNoticeTextView) constrain(systemNoticeTextView) {systemNoticeLabel in systemNoticeLabel.top == systemNoticeLabel.superview!.top + PaddingYMessageTVC systemNoticeLabel.centerX == systemNoticeLabel.superview!.centerX systemNoticeLabel.bottom == systemNoticeLabel.superview!.bottom systemNoticeLabel.width <= systemNoticeLabel.superview!.width – (2 * (WidthAvatarPadding + SizeAvatarImage + BubbleArrowWidth)) } |
效果：
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