iOS 计算文字高度

#pragma mark-once 获取文字高度

- (CGSize)sizeWithmaxSize:(CGSize)size anText:(NSString *)anString

{

    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:anString];

    NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc]init];

    [style setLineSpacing:6.0f];

    [attributedString addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, [anString length])];

        CGSize realSize = CGSizeZero;

    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {

        CGRect textRect = [anString boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:MyConsulDetailFrameFontSize],NSParagraphStyleAttributeName:style} context:nil];

        realSize = textRect.size;

    } else {

        realSize =  [anString sizeWithFont:[UIFont systemFontOfSize:MyConsulDetailFrameFontSize] maxSize:size lineBreakMode:NSLineBreakByCharWrapping];

    }

    realSize.width = ceilf(realSize.width);

    realSize.height = ceilf(realSize.height);

    return realSize;

}