我有一个UILabel，我想在顶部和底部添加空格。在限制最小高度的情况下，我将其修改为:
为了做到这一点，我使用了:
override func drawTextInRect(rect: CGRect) {
var insets: UIEdgeInsets = UIEdgeInsets(top: 0.0, left: 10.0, bottom: 0.0, right: 10.0)
super.drawTextInRect(UIEdgeInsetsInsetRect(rect, insets))
}
但我必须找到不同的方法，因为如果我写了超过两行，问题是一样的:
当前回答
你可以从IB正确地做到:
将文本更改为带属性
使用"…"进入下拉列表
你会看到一些填充属性的行，段落和文本变化缩进第一行或任何你想要的
检查结果
其他回答
objective - c
基于Tai Le的回答，它在一个Interface Builder Designable中实现了这个特性，下面是Objective-C版本。
把这个放在YourLabel.h文件中:
@interface YourLabel : UILabel
@property IBInspectable CGFloat topInset;
@property IBInspectable CGFloat bottomInset;
@property IBInspectable CGFloat leftInset;
@property IBInspectable CGFloat rightInset;
@end
这个会放在yourlabel。m文件中:
IB_DESIGNABLE
@implementation YourLabel
#pragma mark - Super
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
self.topInset = 0;
self.bottomInset = 0;
self.leftInset = 0;
self.rightInset = 0;
}
return self;
}
- (void)drawTextInRect:(CGRect)rect {
UIEdgeInsets insets = UIEdgeInsetsMake(self.topInset, self.leftInset, self.bottomInset, self.rightInset);
[super drawTextInRect:UIEdgeInsetsInsetRect(rect, insets)];
}
- (CGSize)intrinsicContentSize {
CGSize size = [super intrinsicContentSize];
return CGSizeMake(size.width + self.leftInset + self.rightInset,
size.height + self.topInset + self.bottomInset);
}
@end
然后，在XIB文件或故事板中指定类后，您可以直接在Interface Builder中修改YourLabel嵌入，嵌入的默认值为零。
斯威夫特5
在layoutSubviews()方法上，更改UILabel的插入，如下所示。
override func layoutSubviews() {
super.layoutSubviews()
label.frame = label.frame.inset(by: UIEdgeInsets(top: 5, left: 10, bottom: 5, right: 10))
}
简单的填充:
import UIKit
class NewLabel: UILabel {
override func textRectForBounds(bounds: CGRect, limitedToNumberOfLines numberOfLines: Int) -> CGRect {
return CGRectInset(self.bounds, CGFloat(15.0), CGFloat(15.0))
}
override func drawRect(rect: CGRect) {
super.drawTextInRect(CGRectInset(self.bounds,CGFloat(5.0), CGFloat(5.0)))
}
}
另一个没有子类化的选项是:
设置标签文本 sizeToFit () 然后稍微增加标签高度以模拟填充 标签。text = "someText" 标签。textAlignment = .center label.sizeToFit () label.frame = CGRect(x: label.frame.x, y: label.frame.y,width: label.frame.width + 20,height: label.frame.height + 8)
类似于其他答案，但使用func类来动态地设置填充:
class UILabelExtendedView: UILabel
{
var topInset: CGFloat = 4.0
var bottomInset: CGFloat = 4.0
var leftInset: CGFloat = 8.0
var rightInset: CGFloat = 8.0
override func drawText(in rect: CGRect)
{
let insets: UIEdgeInsets = UIEdgeInsets(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
}
override public var intrinsicContentSize: CGSize
{
var contentSize = super.intrinsicContentSize
contentSize.height += topInset + bottomInset
contentSize.width += leftInset + rightInset
return contentSize
}
func setPadding(top: CGFloat, left: CGFloat, bottom: CGFloat, right: CGFloat){
self.topInset = top
self.bottomInset = bottom
self.leftInset = left
self.rightInset = right
let insets: UIEdgeInsets = UIEdgeInsets(top: top, left: left, bottom: bottom, right: right)
super.drawText(in: UIEdgeInsetsInsetRect(self.frame, insets))
}
}
