我希望在iOS中通过 xib 垂直对齐UILabel
的文本与行间距,例如:
hello,
how are
you?
请帮帮我。
答案 0 :(得分:10)
是的,可以通过xib调整行间距。单击xib上的UIlabel,然后将“text”属性类型更改为“Attributed”,然后浏览以下图像。然后输入换行(按ctrl-return快捷键)并将光标保持在两行之间,然后调整所需的'line'属性和'Max Height'属性。我的UILael文本是“你好,你好吗?”
答案 1 :(得分:6)
创建这个简单的UILabel子类:
@interface CustomLabel : UILabel
@property (assign, nonatomic) CGFloat myLineSpacing;
@end
@implementation CustomLabel
- (void)setMyLineSpacing:(CGFloat)myLineSpacing {
_myLineSpacing = myLineSpacing;
self.text = self.text;
}
- (void)setText:(NSString *)text {
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = _myLineSpacing;
paragraphStyle.alignment = self.textAlignment;
NSDictionary *attributes = @{NSParagraphStyleAttributeName: paragraphStyle};
NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text
attributes:attributes];
self.attributedText = attributedText;
}
使用IB设置myLineSpacing
属性值。
仍然无法在IB中预览,但行间距值在 xib !中
您可以在代码中设置label.text
,而无需关心行间距。
注意:强>
请勿输入属性名称" lineSpacing
"。
UILabel确实有未记录的lineSpacing属性,并且覆盖会破坏某些东西。
答案 2 :(得分:3)
*来自Interface Builder:**
<强>编程:强>
SWift 4
使用标签扩展
extension UILabel {
// Pass value for any one of both parameters and see result
func setLineSpacing(lineSpacing: CGFloat = 0.0, lineHeightMultiple: CGFloat = 0.0) {
guard let labelText = self.text else { return }
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = lineSpacing
paragraphStyle.lineHeightMultiple = lineHeightMultiple
let attributedString:NSMutableAttributedString
if let labelattributedText = self.attributedText {
attributedString = NSMutableAttributedString(attributedString: labelattributedText)
} else {
attributedString = NSMutableAttributedString(string: labelText)
}
// Line spacing attribute
attributedString.addAttribute(NSAttributedStringKey.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attributedString.length))
self.attributedText = attributedString
}
}
现在调用扩展功能
let label = UILabel()
let stringValue = "How\nto\nimplement\nUILabel\nline\nspacing\nusing\nxib?"
// Pass value for any one argument - lineSpacing or lineHeightMultiple
label.setLineSpacing(lineSpacing: 2.0) . // try values 1.0 to 5.0
// or try lineHeightMultiple
//label.setLineSpacing(lineHeightMultiple = 2.0) // try values 0.5 to 2.0
或使用标签实例(只需复制并执行此代码即可查看结果)
let label = UILabel()
let stringValue = "How\nto\nimplement\nUILabel\nline\nspacing\nusing\nxib?"
let attrString = NSMutableAttributedString(string: stringValue)
var style = NSMutableParagraphStyle()
style.lineSpacing = 24 // change line spacing between paragraph like 36 or 48
style.minimumLineHeight = 20 // change line spacing between each line like 30 or 40
// Line spacing attribute
attrString.addAttribute(NSAttributedStringKey.paragraphStyle, value: style, range: NSRange(location: 0, length: stringValue.characters.count))
// Character spacing attribute
attrString.addAttribute(NSAttributedStringKey.kern, value: 2, range: NSMakeRange(0, attrString.length))
label.attributedText = attrString
答案 3 :(得分:-7)
在TextEdit等任何文本编辑器中以完全相同的方式键入它,然后在xib中粘贴标签的文本部分。
但请确保标签的高度更适合内容,并增加行数。对于这种情况,它可以是3或更多。