Xcode 根据要显示的内容和内容字体，自适应调整UILabel的大小

-(UILabel *)getLabelContent:(NString *)str{
//初始化label
UILabel *label = [[UILabelalloc] initWithFrame:CGRectMake(0,0,0,0)];
label.textAlignment=NSTextAlignmentLeft;
//设置自动行数与字符换行
[label setNumberOfLines:0];
label.lineBreakMode =NSLineBreakByWordWrapping;
// 测试字串
NSString *content =str;
UIFont *font = [selfgetDetailFont];
//设置一个行高上限
   CGSize size = CGSizeMake(self.view.frame.size.width-[selfgetContentTitleWidth]-20,2000);
//计算实际frame大小，并将label的frame变成实际大小
CGSize labelsize = [contentsizeWithFont:font constrainedToSize:sizelineBreakMode:NSLineBreakByWordWrapping];
if (labelsize.height >44) {
[labelsetFrame:CGRectMake([selfgetContentTitleWidth]+18,0,labelsize.width, labelsize.height+30)];
}else {
  [labelsetFrame:CGRectMake([selfgetContentTitleWidth]+18,0,labelsize.width,44)];
}
label.text=content;
label.font=font;
    
return label;
}