label显示的宽高

label单行显示的size

NSDictionary *attribute = @{NSFontAttributeName : [UIFont systemFontOfSize:17]};
        CGSize labelSize = [self.name sizeWithAttributes:attribute];

label多行显示的size

CGFloat textW = [UIScreen mainScreen].bounds.size.width - 10 * 2;
        
        NSDictionary *attribute1 = @{NSFontAttributeName: [UIFont systemFontOfSize:14]};
        CGSize textsize =  [self.text boundingRectWithSize:CGSizeMake(textW, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:attribute1 context:nil].size;

label最多显示两行时的size

NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
        style.maximumLineHeight = 20;
        style.minimumLineHeight = 20;
        CGSize textsize = [self.summary boundingRectWithSize:CGSizeMake(textW, 20 * 2) options: NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:kFont(16),NSParagraphStyleAttributeName:style} context:nil].size;