yuyin_ios/SweetParty/主类/Others/NewTools/UILabel+ChangeSpace.m

//
//  UILabel+ChangeSpace.m
//  romantic
//
//  Created by bj_szd on 2022/4/9.
//  Copyright © 2022 romantic. All rights reserved.
//

#import "UILabel+ChangeSpace.h"

@implementation UILabel (ChangeSpace)

+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space {
    
    NSString *labelText = label.text;
    if (labelText == nil) {
        return;
    }
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    paragraphStyle.alignment = NSTextAlignmentJustified;//两端对齐
    [paragraphStyle setLineSpacing:space];
    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
    label.attributedText = attributedString;
//    [label sizeToFit];
}

+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space {
    
    NSString *labelText = label.text;
    if (labelText == nil) {
        return;
    }
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(space)}];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
    label.attributedText = attributedString;
    [label sizeToFit];
    
}

+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace {
    
    NSString *labelText = label.text;
    if (labelText == nil) {
        return;
    }
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(wordSpace)}];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    [paragraphStyle setLineSpacing:lineSpace];
    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
    label.attributedText = attributedString;
    [label sizeToFit];
}

/**
 改变label文字中某段文字的颜色，大小
 label 传入label（传入前要有文字）
 oneW  从第一个文字开始
 twoW  到最后一个文字结束
 color 颜色
 size 尺寸
 */
- (void)LabelAttributedString:(UILabel*)label firstW:(NSString *)oneW  size:(CGFloat)size {
    // 创建Attributed
    NSMutableAttributedString *noteStr = [[NSMutableAttributedString alloc] initWithString:label.text];
    // 需要改变的最后一个文字的位置
    NSRange range = [[noteStr string] rangeOfString:oneW];
    // 改变字体大小及类型
    [noteStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:size] range:range];
    // 为label添加Attributed
    [label setAttributedText:noteStr];
}


// label底部对齐
- (void)bottomAlignment
{
    CGSize size = [self.text sizeWithAttributes:@{NSFontAttributeName:self.font}];
    CGRect rect = [self.text boundingRectWithSize:CGSizeMake(self.frame.size.width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:self.font} context:nil];
    self.numberOfLines = 0;
    NSInteger newLinesToPad = (self.frame.size.height - rect.size.height)/size.height;
    for (NSInteger i = 0; i < newLinesToPad; i ++) {
        self.text = [NSString stringWithFormat:@" \n%@",self.text];
    }
}


// label顶部对齐
- (void)topAlignment
{
    CGSize size = [self.text sizeWithAttributes:@{NSFontAttributeName:self.font}];
    CGRect rect = [self.text boundingRectWithSize:CGSizeMake(self.frame.size.width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:self.font} context:nil];
    self.numberOfLines = 0;
    NSInteger newLinesToPad = (self.frame.size.height - rect.size.height)/size.height;
    for (NSInteger i = 0; i < newLinesToPad; i ++) {
        self.text = [self.text stringByAppendingString:@"\n "];
    }
}

+ (CGFloat)textHeight:(NSString *)text font:(UIFont *)font width:(CGFloat)width lineSpace:(CGFloat)lineSpace {
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    paragraphStyle.lineBreakMode = NSLineBreakByCharWrapping;
    paragraphStyle.lineSpacing = lineSpace;
    //Attribute传和label设定的一样
    NSDictionary * attributes = @{
                                  NSFontAttributeName:font,
                                  NSParagraphStyleAttributeName: paragraphStyle
                                  };
    //这里的size，width传label的宽，高默认都传MAXFLOAT
    CGSize textRect = CGSizeMake(width, MAXFLOAT);
    CGFloat textHeight = [text boundingRectWithSize: textRect
                                           options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading
                                        attributes:attributes
                                           context:nil].size.height;
    return textHeight;
}

@end