Question

我必须显示一些文本（动态），它包含三个字符串变量，如下所示：

SanFransisco，California 32122，即city，state zipCode

所以想到用三个标签显示它们。但是我无法理解何时使用sizetoFit以及何时不使用。如果它是一个像BrightWood Park,District of Columbia 32123那样的大文本，那么我就像BrightWood Park,District of Columb那样。我无法在模拟器上看到zipCode部分。所以无论文本是什么，都应该在模拟器中显示。

如果城市的文字很大，如Massachusetts Avenue Heights,District of Columbia 32123，那么它应该显示为Massachusetts Avenue Heights,District of

                                                Columbia   32123

目前我正在Massachusetts Avenue Heights,District of Co

NSString *city=[NSString stringWithFormat:@"%@,",self.city];
 CGSize constraint4 = CGSizeMake(250, 2000.0f);
 CGSize size4=[city sizeWithFont:[UIFont fontWithName:@"Helvetica-Bold" size:12] constrainedToSize:constraint4 lineBreakMode:UILineBreakModeWordWrap];
 lblCity=[[UILabel alloc] init];
 [lblCity setFrame:CGRectMake(60,Lane1.frame.size.height+Lane1.frame.origin.y,size4.width,size4.height) ];
 lblCity.textAlignment=UITextAlignmentLeft;
 lblCity.backgroundColor=[UIColor clearColor];
 lblCity.text=[NSString stringWithFormat:@"%@",city];
 [lblCity setNumberOfLines:0];
 lblCity.highlightedTextColor=[UIColor greenColor];
 [lblCity setFont:[UIFont fontWithName:@"Helvetica-Bold" size:12]];
 [testscroll addSubview: lblCity];


  NSString *state=[NSString stringWithFormat:@"%@ ",self.state];
  CGSize constraint5 = CGSizeMake(250, 2000.0f);
  CGSize size5=[state sizeWithFont:[UIFont fontWithName:@"Helvetica-Bold" size:12] constrainedToSize:constraint5 lineBreakMode:UILineBreakModeWordWrap];
  lblState=[[UILabel alloc] init];
  [lblState setFrame:CGRectMake(lblCity.frame.origin.x+lblCity.frame.size.width,Lane1.frame.size.height+Lane1.frame.origin.y,size5.width,size5.height) ];
  lblState.textAlignment=UITextAlignmentLeft;
  lblState.backgroundColor=[UIColor clearColor];
  lblState.text=[NSString stringWithFormat:@"%@" ,state];
  [lblState setNumberOfLines:0];
   lblState.highlightedTextColor=[UIColor greenColor];
   [lblState setFont:[UIFont fontWithName:@"Helvetica-Bold" size:12]];
   [testscroll addSubview: lblState];

   NSString *zip=[NSString stringWithFormat:@"%@",self.zip];
   CGSize constraint200=CGSizeMake(250,2000.0f);
   CGSize size200=[zip sizeWithFont:[UIFont fontWithName:@"Helvetica-Bold" size:12]constrainedToSize:constraint200 lineBreakMode:UILineBreakModeWordWrap ];
    zipCode=[[UILabel alloc] init];
   [zipCode setFrame:CGRectMake(lblState.frame.origin.x+lblState.frame.size.width,Lane1.frame.size.height+Lane1.frame.origin.y,size200.width,size200.height) ];
    zipCode.textAlignment=UITextAlignmentLeft;
    zipCode.backgroundColor=[UIColor clearColor];
    zipCode.text=[NSString stringWithFormat:@"%@" ,zip];
    [zipCode setNumberOfLines:0];
    zipCode.highlightedTextColor=[UIColor greenColor];
    [zipCode setFont:[UIFont fontWithName:@"Helvetica-Bold" size:12]];
    [testscroll addSubview:zipCode];

2.何时沿numberofLines = 0使用sizetoFit，何时不使用？

Answer 1

制作自动调整UILabel有几个要点。

首先，您必须将标签的高度设置为零
第二，您必须将标签“numberOfLines设置为零
最后，您必须致电sizeToFit方法

像这样：

label.frame = CGRectMake(x, y, width, 0.0f);
label.numberOfLines = 0;
[label sizeToFit];

Answer 2

获取字符串后，像这样设置UILabel大小

lblCity.text=[NSString stringWithFormat:@"%@",city];
 [lblCity setNumberOfLines:0];
 [lblCity setFrame:CGRectMake(60,Lane1.frame.size.height+Lane1.frame.origin.y,size4.width,size4.height) ];
[lblCity sizeToFit]; it may be work

///这里我测试工作正常并显示全文

NSString *city=@"Orlando ";
    CGSize constraint4 = CGSizeMake(250, 2000.0f);
    CGSize size4=[city sizeWithFont:[UIFont fontWithName:@"Helvetica-Bold" size:12] constrainedToSize:constraint4 lineBreakMode:UILineBreakModeWordWrap];
    NSLog(@"size4.width %f height %f ",size4.width,size4.height);
   UILabel* lblCity=[[UILabel alloc] init];
    [lblCity setFrame:CGRectMake(160,16,size4.width,size4.height) ];
    lblCity.textAlignment=UITextAlignmentLeft;
    lblCity.backgroundColor=[UIColor clearColor];
    lblCity.text=[NSString stringWithFormat:@"%@",city];
    [lblCity setNumberOfLines:0];
    lblCity.highlightedTextColor=[UIColor greenColor];
    [lblCity setFont:[UIFont fontWithName:@"Helvetica-Bold" size:12]];
     [lblCity sizeToFit];
    [self.view addSubview: lblCity];

UILabel的numberofLines问题

2 个答案: