121 lines
5.0 KiB
Objective-C
Executable File
121 lines
5.0 KiB
Objective-C
Executable File
//
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// UILabel+ChangeSpace.m
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// romantic
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//
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// Created by bj_szd on 2022/4/9.
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// Copyright © 2022 romantic. All rights reserved.
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//
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#import "UILabel+ChangeSpace.h"
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@implementation UILabel (ChangeSpace)
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+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space {
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NSString *labelText = label.text;
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if (labelText == nil) {
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return;
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}
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NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText];
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NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
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paragraphStyle.alignment = NSTextAlignmentJustified;//两端对齐
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[paragraphStyle setLineSpacing:space];
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[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
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label.attributedText = attributedString;
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// [label sizeToFit];
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}
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+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space {
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NSString *labelText = label.text;
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if (labelText == nil) {
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return;
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}
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NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(space)}];
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NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
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[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
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label.attributedText = attributedString;
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[label sizeToFit];
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}
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+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace {
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NSString *labelText = label.text;
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if (labelText == nil) {
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return;
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}
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NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(wordSpace)}];
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NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
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[paragraphStyle setLineSpacing:lineSpace];
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[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
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label.attributedText = attributedString;
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[label sizeToFit];
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}
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/**
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改变label文字中某段文字的颜色，大小
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label 传入label（传入前要有文字）
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oneW 从第一个文字开始
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twoW 到最后一个文字结束
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color 颜色
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size 尺寸
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*/
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- (void)LabelAttributedString:(UILabel*)label firstW:(NSString *)oneW size:(CGFloat)size {
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// 创建Attributed
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NSMutableAttributedString *noteStr = [[NSMutableAttributedString alloc] initWithString:label.text];
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// 需要改变的最后一个文字的位置
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NSRange range = [[noteStr string] rangeOfString:oneW];
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// 改变字体大小及类型
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[noteStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:size] range:range];
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// 为label添加Attributed
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[label setAttributedText:noteStr];
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}
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// label底部对齐
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- (void)bottomAlignment
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{
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CGSize size = [self.text sizeWithAttributes:@{NSFontAttributeName:self.font}];
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CGRect rect = [self.text boundingRectWithSize:CGSizeMake(self.frame.size.width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:self.font} context:nil];
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self.numberOfLines = 0;
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NSInteger newLinesToPad = (self.frame.size.height - rect.size.height)/size.height;
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for (NSInteger i = 0; i < newLinesToPad; i ++) {
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self.text = [NSString stringWithFormat:@" \n%@",self.text];
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}
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}
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// label顶部对齐
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- (void)topAlignment
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{
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CGSize size = [self.text sizeWithAttributes:@{NSFontAttributeName:self.font}];
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CGRect rect = [self.text boundingRectWithSize:CGSizeMake(self.frame.size.width, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:self.font} context:nil];
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self.numberOfLines = 0;
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NSInteger newLinesToPad = (self.frame.size.height - rect.size.height)/size.height;
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for (NSInteger i = 0; i < newLinesToPad; i ++) {
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self.text = [self.text stringByAppendingString:@"\n "];
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}
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}
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+ (CGFloat)textHeight:(NSString *)text font:(UIFont *)font width:(CGFloat)width lineSpace:(CGFloat)lineSpace {
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NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
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paragraphStyle.lineBreakMode = NSLineBreakByCharWrapping;
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paragraphStyle.lineSpacing = lineSpace;
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//Attribute传和label设定的一样
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NSDictionary * attributes = @{
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NSFontAttributeName:font,
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NSParagraphStyleAttributeName: paragraphStyle
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};
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//这里的size，width传label的宽，高默认都传MAXFLOAT
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CGSize textRect = CGSizeMake(width, MAXFLOAT);
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CGFloat textHeight = [text boundingRectWithSize: textRect
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options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading
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attributes:attributes
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context:nil].size.height;
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return textHeight;
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}
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@end
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