UILabel设置行间距和字间距并计算高度－b

#define UILABEL_LINE_SPACE 6

#define HEIGHT [ [ UIScreen mainScreen ] bounds ].size.height

//给UILabel设置行间距和字间距

-(void)setLabelSpace:(UILabel*)label withValue:(NSString*)str withFont:(UIFont*)font {

NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStylealloc] init];

paraStyle.lineBreakMode =NSLineBreakByCharWrapping;

paraStyle.alignment =NSTextAlignmentLeft;

paraStyle.lineSpacing = UILABEL_LINE_SPACE; //设置行间距

paraStyle.hyphenationFactor = 1.0;

paraStyle.firstLineHeadIndent =0.0;

paraStyle.paragraphSpacingBefore =0.0;

paraStyle.headIndent = 0;

paraStyle.tailIndent = 0;

//设置字间距 NSKernAttributeName:@1.5f

NSDictionary *dic =@{NSFontAttributeName:font,NSParagraphStyleAttributeName:paraStyle,NSKernAttributeName:@1.5f
};

NSAttributedString *attributeStr = [[NSAttributedStringalloc] initWithString:strattributes:dic];

label.attributedText = attributeStr;

}

//计算UILabel的高度(带有行间距的情况)

-(CGFloat)getSpaceLabelHeight:(NSString*)str withFont:(UIFont*)font withWidth:(CGFloat)width {

NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStylealloc] init];

paraStyle.lineBreakMode =NSLineBreakByCharWrapping;

paraStyle.alignment =NSTextAlignmentLeft;

paraStyle.lineSpacing = UILABEL_LINE_SPACE;

paraStyle.hyphenationFactor = 1.0;

paraStyle.firstLineHeadIndent =0.0;

paraStyle.paragraphSpacingBefore =0.0;

paraStyle.headIndent = 0;

paraStyle.tailIndent = 0;

NSDictionary *dic =@{NSFontAttributeName:font,NSParagraphStyleAttributeName:paraStyle,NSKernAttributeName:@1.5f
};

CGSize size = [strboundingRectWithSize:CGSizeMake(width,HEIGHT) options:NSStringDrawingUsesLineFragmentOriginattributes:dic context:nil].size;

return size.height;

}