UILabel使用的小技巧

以下是常用的属性：

UILabel *label1
= [[UILabel alloc]initWithFrame:CGRectMake(50.0, 20.0, 200.0, 50.0)];//声明时必须指定长宽

label1.text = @"标签显示的文字";

label1.font =
[UIFont boldSystemFontOfSize:20];//设置粗体
 正常的是 SystemFontOfSize

label1.textColor
= [[UIColoralloc]initWithRed:173/255.0green:225/255.0blue:255/255.0alpha:1];//设置颜色，现成的颜色也很多，注意255.0
label1.textAlignment = UITextAlignmentRight; //设置文字位置 

label1.adjustsFontSizeToFitWidth = YES;//设置字体大小适应label宽度

//self.jobNumber.minimumScaleFactor = 8.0;
self.jobNumber.minimumFontSize
= 8.0;//设置最小显示字体，字过多时会自适应

label5.numberOfLines = 2;//设置label的行数 

label.backgroundColor = [UIColorclearColor];//去掉背景

其他：

 label.transform
=

CGAffineTransformMakeRotation(0.2);//设置label的旋转角度

label7.userInteractionEnabled = YES; //设置是否能与用户进行交互

label3.enabled = NO;//设置label中的文字是否可变，默认值是YES

label3.lineBreakMode = UILineBreakModeMiddleTruncation;//截去中间 //设置文字过长时的显示格式

//      UILineBreakModeWordWrap = 0,     

//      UILineBreakModeCharacterWrap,     

//      UILineBreakModeClip,//截去多余部分     

//      UILineBreakModeHeadTruncation,//截去头部     

//      UILineBreakModeTailTruncation,//截去尾部     

//      UILineBreakModeMiddleTruncation,//截去中间 

label文字显示的一些特效:

    //文字凹陷效果
   UILabel *label1 = [[UILabelalloc]initWithFrame:CGRectMake(10,10,300, 100)];
    label1.text =@"文字凹陷效果";
    label1.shadowColor = [UIColorcolorWithRed:0.855green:0.863blue:0.882alpha:1.0];
    label1.textColor = [UIColorcolorWithRed:0.298green:0.337blue:0.424alpha:1.0];
    label1.backgroundColor = [UIColorcyanColor];
    [self.viewaddSubview:label1];

    
   
//文字阴影效果
   UILabel * label = [[UILabelalloc]initWithFrame:CGRectMake(10,100,300, 100)];
    label.text =@"文字阴影效果";
    label.textColor = [UIColorcolorWithRed:0.4green:0.6blue:0.1alpha:1.0];
    label.textAlignment =UITextAlignmentCenter;
    label.font = [UIFontfontWithName:[[UIFontfamilyNames]objectAtIndex:2]size:35];
    label.adjustsFontSizeToFitWidth =YES;
    label.numberOfLines =0;
    label.tag =0;
    label.backgroundColor = [UIColorcyanColor];
    label.shadowColor = [UIColoryellowColor];
    label.shadowOffset =CGSizeMake(3,3);
    [self.viewaddSubview:label];

    
   
//label中文字跑马灯效果

    
   UILabel *label3 = [[UILabelalloc]initWithFrame:CGRectMake(10,200,300, 100)];
    label3.text =@"试试吧";
    [self.viewaddSubview:label3];
   CGRect frame = label3.frame;
    frame.origin.x = -180;
    label3.frame = frame;
    [UIViewbeginAnimations:@"testAnimation"context:NULL];
    [UIViewsetAnimationDuration:8.8f];
    [UIViewsetAnimationCurve:UIViewAnimationCurveLinear];
    [UIViewsetAnimationDelegate:self];
    [UIViewsetAnimationRepeatAutoreverses:NO];
    [UIViewsetAnimationRepeatCount:999999];
    frame = label3.frame;
    frame.origin.x =350;
    label3.frame = frame;
    [UIViewcommitAnimations];