调用
#import "UILabel+XMarginCategry.h"
[self.nameLabel textAlignmentLeftAndRight];
[self.nameLabel textAlignmentLeftAndRightWith:nameLabelW];
.h
#import <UIKit/UIKit.h>
NS_ASSUME_NONNULL_BEGIN
@interface UILabel (XMarginCategry)
//两端对齐
- (void)textAlignmentLeftAndRight;
//指定Label以最后的冒号对齐的width两端对齐
- (void)textAlignmentLeftAndRightWith:(CGFloat)labelWidth;
@end
NS_ASSUME_NONNULL_END
.m
#import "UILabel+XMarginCategry.h"
#import <CoreText/CoreText.h>
@implementation UILabel (XMarginCategry)
- (void)textAlignmentLeftAndRight{
[self textAlignmentLeftAndRightWith:CGRectGetWidth(self.frame)];
}
- (void)textAlignmentLeftAndRightWith:(CGFloat)labelWidth{
if(self.text==nil||self.text.length==0) {
return;
}
CGSize size = [self.text boundingRectWithSize:CGSizeMake(labelWidth,MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingTruncatesLastVisibleLine|NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:self.font} context:nil].size;
NSInteger length = (self.text.length-1);
NSString* lastStr = [self.text substringWithRange:NSMakeRange(self.text.length-1,1)];
if([lastStr isEqualToString:@":"]||[lastStr isEqualToString:@"："]) {
length = (self.text.length-2);
}
CGFloat margin = (labelWidth - size.width)/length;
NSNumber*number = [NSNumber numberWithFloat:margin];
NSMutableAttributedString* attribute = [[NSMutableAttributedString alloc]initWithString:self.text];
[attribute addAttribute:NSKernAttributeName value:number range:NSMakeRange(0,length)];
// [attribute addAttribute: value:number range:NSMakeRange(0,length)];
self.attributedText= attribute;
}
@end
