在一个label中显示多行，自动换行

最新推荐文章于 2025-07-26 15:50:33 发布

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本文深入探讨了在Active.com的开发项目中如何处理动态显示DetailPage的问题，包括数据获取、自动换行、计算行高、文本长度与大小的调整，以及实现动态布局的技术细节。

 
 在active.com的开发项目中，遇到一个动态显示detail page的问题。取的数据有的时候多有的时候少，而且还需要自动换行。计算行的高度，text的长度，大小等。
 
  EventAddresslabel=[[UILabel alloc]initWithFrame:CGRectMake(starttimelabel.frame.origin.x,   starttimelabel.frame.origin.y+distance, 270, 20)];
 
  EventAddresslabel.backgroundColor=[UIColor clearColor];
 
  EventAddresslabel.textColor=[UIColor whiteColor];
 
  EventAddresslabel.font=[UIFont systemFontOfSize:15];
 
  EventAddresslabel.numberOfLines =0; //this is used to determine how many lines this label will have.if =3,it means this     label's text will show 3 lines.if =0 ,it means that this label's text will show the line whate it needs.no limit.
 
  EventAddresslabel.lineBreakMode = UILineBreakModeWordWrap;// sys will change the line by word.aslo can be by character  for another value.
 
  EventAddresslabel.text=[NSString stringWithFormat:@"%@  %@,%@",cassetInfo.eventAddress,cassetInfo.city,cassetInfo.state];
 
  [uiview addSubview:EventAddresslabel];
 
  CGSize EventAddresslabelsize = [EventAddresslabel.text sizeWithFont:[UIFont systemFontOfSize:15]    constrainedToSize:CGSizeMake(285, [EventAddresslabel.text length])lineBreakMode:UILineBreakModeWordWrap];
 
  [EventAddresslabel setFrame:CGRectMake(EventAddresslabel.frame.origin.x,EventAddresslabel.frame.origin.y,   290,EventAddresslabelsize.height+10)];
 
  Description=[[UILabel alloc]initWithFrame:CGRectMake(5,EventAddresslabel.frame.origin.y+EventAddresslabel.frame.size.height, 320, 60)];
 
  DescriptionactivityView = [[UIActivityIndicatorView alloc]  initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
 
  DescriptionactivityView.frame = CGRectMake(140.f, EventAddresslabel.frame.origin.y+30, 30.0f,30.0f);
 
  Londinglabel_1=[[UILabel alloc]initWithFrame:CGRectMake(132, Description.frame.origin.y+30, 80,20)];
 
  Labelflag=0;
 
  Description.backgroundColor=[UIColor clearColor];
 
  Description.textColor=[UIColor whiteColor];
 
  Description.font=[UIFont systemFontOfSize:15];
 
  Description.numberOfLines =0;
 
  Description.lineBreakMode = UILineBreakModeWordWrap;
 
  [uiview addSubview:Description];
 
  //该代码片段来自于: http://www.sharejs.com/codes/objectc/2000