Label设置行间距,段间距,字间距

Label设置行间距,段间距,字间距

使用NSMutableAttributedString设置label属性

直接上代码

- (void)viewDidLoad { [super viewDidLoad]; NSString *text = @"突然想要写点什么，来纪念自己即将逝去的大学四年时光，借机过度一下自己此时此刻莫可名状的心情；\n突然想要说点什么，来缅怀一下自己当初万丈豪情遗失的时光和所谓的青春年华。\n不知道是骨子里的性情使然，\n还是内心深处想要特意地煽情?"; UIFont *font = [UIFont systemFontOfSize:14.f];// 字号 CGFloat lineSpace = 5.f; // 行间距 CGFloat paragraphSpacing = 10.f; // 段间距 CGSize labelSize = CGSizeMake([UIScreen mainScreen].bounds.size.width - 20, 0); NSNumber *textLengthSpace = @1.5; // 字间距 NSDictionary *dict = [self setTextLineSpaceWithString:text withLineBreakMode:(NSLineBreakByCharWrapping) withAlignment:NSTextAlignmentLeft withFont:font withLineSpace:lineSpace withTextlengthSpace:textLengthSpace andParagraphSpaceing:paragraphSpacing]; CGFloat height = [self getSpaceLabelHeight:text textSize:labelSize withLineBreakMode:(NSLineBreakByCharWrapping) withAlignment:(NSTextAlignmentLeft) withFont:font withLineSpace:lineSpace withTextlengthSpace:textLengthSpace andParagraphSpaceing:paragraphSpacing]; UILabel *label = [[UILabel alloc] init]; label.numberOfLines = 0; label.frame = CGRectMake(10, 50, labelSize.width, height); label.attributedText = [[NSMutableAttributedString alloc] initWithString:text attributes:dict]; [self.view addSubview:label]; } /** 设置label字体, 行间距, 字间距, 段间距 @param string label上文字 @param lineBreakMode 每行容纳字符的宽度 @param alignment 对齐方式 @param font 字体大小 @param lineSpace 行间距 @param textlengthSpace 字间距 @param paragraphSpacing 段间距 @return 存放属性的字典 */ - (NSDictionary *)setTextLineSpaceWithString:(NSString *)string withLineBreakMode:(NSLineBreakMode)lineBreakMode withAlignment:(NSTextAlignment)alignment withFont:(UIFont *)font withLineSpace:(CGFloat)lineSpace withTextlengthSpace:(NSNumber *)textlengthSpace andParagraphSpaceing:(CGFloat)paragraphSpacing { // 1. 创建样式对象 NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init]; // 2. 每行容纳字符的宽度 style.lineBreakMode = lineBreakMode; // 3. 对齐方式 style.alignment = alignment; // 4. 设置行间距 style.lineSpacing = lineSpace; // 5. 连字符号链接 style.hyphenationFactor = 1.0f; // 6. 首行缩进 style.firstLineHeadIndent = 30.0f; // 7. 段间距 style.paragraphSpacing = paragraphSpacing; // 8. 段前间距 style.paragraphSpacingBefore = 0.0f; // 9. 除首行之外其他行缩进 style.headIndent = 0.0f; // 10. 每行容纳字符的宽度 style.tailIndent = 0.0f; NSDictionary *dict = @{NSFontAttributeName : font, NSParagraphStyleAttributeName : style, NSKernAttributeName : textlengthSpace, }; return dict; } /* 计算label高度 */ - (CGFloat)getSpaceLabelHeight:(NSString *)string textSize:(CGSize)textSize withLineBreakMode:(NSLineBreakMode)lineBreakMode withAlignment:(NSTextAlignment)alignment withFont:(UIFont *)font withLineSpace:(CGFloat)lineSpace withTextlengthSpace:(NSNumber *)textlengthSpace andParagraphSpaceing:(CGFloat)paragraphSpacing { NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init]; style.lineBreakMode = lineBreakMode; style.alignment = alignment; style.lineSpacing = lineSpace; style.paragraphSpacing = paragraphSpacing; style.hyphenationFactor = 1.0; style.firstLineHeadIndent = 30.0; style.paragraphSpacingBefore = 0.0; style.headIndent = 0; style.tailIndent = 0; NSDictionary *dic = @{NSFontAttributeName:font, NSParagraphStyleAttributeName:style, NSKernAttributeName:textlengthSpace }; CGSize size = [string boundingRectWithSize:textSize options:NSStringDrawingUsesLineFragmentOrigin attributes:dic context:nil].size; return size.height; }

效果如图:

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