我想设置一个UILabel的左插图/边距,但找不到这样做的方法。标签有一个背景集,所以仅仅改变它的原点是行不通的。这将是理想的插入文本10px左右在左手边。
当前回答
如果以编程方式创建标签,则可以使用sizeThatFits方法计算填充。如果使用多行,文本将以最大宽度值换行。
let text = UILabel()
let padding = 10
text.layer.cornerRadius = 5
text.layer.masksToBounds = true
text.text = "Hello"
text.font = UIFont(name: text.font.fontName, size: 18)
text.textAlignment = NSTextAlignment.center
text.numberOfLines = 1
let maxSize = CGSize(width: 100, height: 100)
var size = text.sizeThatFits(maxSize)
size.width = size.width + padding * 2
size.height = size.height + padding * 2
text.frame = CGRect(origin: CGPoint(x: 0, y: 0), size: size)
其他回答
这适用于多行标签:
class PaddedLabel: UILabel {
var verticalPadding: CGFloat = 0
var horizontalPadding: CGFloat = 0
override func drawText(in rect: CGRect) {
let insets = UIEdgeInsets(top: verticalPadding, left: horizontalPadding, bottom: verticalPadding, right: horizontalPadding)
super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
}
override var intrinsicContentSize: CGSize {
get {
let textWidth = super.intrinsicContentSize.width - horizontalPadding * 2
let textHeight = sizeThatFits(CGSize(width: textWidth, height: .greatestFiniteMagnitude)).height
let width = textWidth + horizontalPadding * 2
let height = textHeight + verticalPadding * 2
return CGSize(width: frame.width, height: height)
}
}
}
我认为UILabel类没有设置边距的方法。为什么不把标签的位置设置在需要的位置?
见下面的代码:
UILabel *label = [[UILabel alloc] init];
label.text = @"This is label";
label.frame = CGRectMake(0,0,100,100);
如果来自接口构建器,则按以下方式定位Label:
yourLabel.frame = CGRectMake(0,0,100,100);
设置标签的textAlignment属性为NSTextAlignmentRight并增加它的宽度。
#import "E_LabelWithPadding.h"
#define padding UIEdgeInsetsMake(2, 0, 2, 0)
#define padding1 UIEdgeInsetsMake(0, 0, 0, 0)
@implementation E_LabelWithPadding
- (void)drawTextInRect:(CGRect)rect {
if (![self.text isEqualToString:@""]) {
[super drawTextInRect:UIEdgeInsetsInsetRect(rect, padding)];
}else {
[super drawTextInRect:UIEdgeInsetsInsetRect(rect, padding1)];
}
}
- (CGSize) intrinsicContentSize {
if (![self.text isEqualToString:@""]) {
CGSize superContentSize = [super intrinsicContentSize];
CGFloat width = superContentSize.width + padding.left + padding.right;
CGFloat height = superContentSize.height + padding.top + padding.bottom;
return CGSizeMake(width, height);
}else {
CGSize superContentSize = [super intrinsicContentSize];
CGFloat width = superContentSize.width + padding1.left + padding1.right;
CGFloat height = superContentSize.height + padding1.top + padding1.bottom;
return CGSizeMake(width, height);
}
}
- (CGSize) sizeThatFits:(CGSize)size {
if (![self.text isEqualToString:@""]) {
CGSize superSizeThatFits = [super sizeThatFits:size];
CGFloat width = superSizeThatFits.width + padding.left + padding.right;
CGFloat height = superSizeThatFits.height + padding.top + padding.bottom;
return CGSizeMake(width, height);
}else {
CGSize superSizeThatFits = [super sizeThatFits:size];
CGFloat width = superSizeThatFits.width + padding1.left + padding1.right;
CGFloat height = superSizeThatFits.height + padding1.top + padding1.bottom;
return CGSizeMake(width, height);
}
}
@end
也许你可以试试这段代码
CGRect frame = btn.titleLabel.frame;
int indent = 20;
int inset = 20;
[btn.titleLabel setFrame:CGRectMake(frame.origin.x+inset,frame.origin.y,frame.size.width+indent,frame.size.height)];
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