tederen_ios/smartRhino/Project/Tools/UILabel+RightAndLeft.m

//
//  UILabel+RightAndLeft.m
//  smartRhino
//
//  Created by tederen on 2019/11/28.
//  Copyright © 2019 tederen. All rights reserved.
//

#import "UILabel+RightAndLeft.h"




@implementation UILabel (RightAndLeft)
- (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)];

self.attributedText= attribute;

}

@end