直接上代码
tipLabel = [[UILabel alloc] init]; [self.backScrollView addSubview:tipLabel]; NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init]; [style setLineSpacing:10]; NSString *tipStr = @"温馨提示：这是要计算高度的字符串"; NSDictionary *dic = @{NSFontAttributeName:kSystemFont_16, NSParagraphStyleAttributeName:style}; NSAttributedString *attributeStr = [[NSAttributedString alloc] initWithString:tipStr attributes:dic]; tipLabel.attributedText = attributeStr; tipLabel.numberOfLines = 0; CGFloat height = [self getHeightLineWithString:tipStr withWidth:kDeviceWidth - 20 withFont:kSystemFont_16]; tipLabel.frame = CGRectMake(10, topHeight + 300, kDeviceWidth - 20, height); #pragma mark - 根据字符串计算label高度 - (CGFloat)getHeightLineWithString:(NSString *)string withWidth:(CGFloat)width withFont:(UIFont *)font { //1.1最大允许绘制的文本范围 CGSize size = CGSizeMake(width, 2000); //1.2配置计算时的行截取方法,和contentLabel对应 NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init]; [style setLineSpacing:10]; //1.3配置计算时的字体的大小 //1.4配置属性字典 NSDictionary *dic = @{NSFontAttributeName:font, NSParagraphStyleAttributeName:style}; //2.计算 //如果想保留多个枚举值,则枚举值中间加按位或|即可,并不是所有的枚举类型都可以按位或,只有枚举值的赋值中有左移运算符时才可以 CGFloat height = [string boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:dic context:nil].size.height; return height; }
