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;}
