UILable用法

原文：http://blog.sina.com.cn/s/blog_bf9843bf0101f7z7.html(1)初始化UILabel *aLabel=[[UILabel alloc]initWithFrame:CGRectMake(50, 50, 100, 50)];(2)文字内容//位置默认是靠左的[aLabel setText:@"hello"];//设置字体颜色aLabel.textColor=[UIColor blueColor];aLabel.textColor=[UIColor redColor];//设置字体大小aLabel.font=[UIFont systemFontOfSize:12.4];//修改字体的字体和大小aLabel.font=[UIFont fontWithName:@"Arial Rounded MT Bold" size:36.0];//设置背景颜色aLabel.backgroundColor=[UIColor redColor];//清空背景颜色aLabel.backgroundColor=[UIColor clearColor];//设置对齐方式aLabel.textAlignment = UITextAlignmentLeft;//文字靠左aLabel.textAlignment = UITextAlignmentCenter;//文字居中aLabel.textAlignment = UITextAlignmentRight;//文字靠右//设置字体大小是否适应label宽度aLabel.adjustsFontSizeToFitWidth=YES;//是YES时，这个属性就来控制文本基线的行为在定义里面允许有以下格式显示：  

  typedef enum {    

 

      UIBaselineAdjustmentAlignBaselines,  

 

//默认值文本最上端与label中间线对齐

 [/code] 

      UIBaselineAdjustmentAlignCenters,  

 

//text中间与label中间线对齐

 

     UIBaselineAdjustmentNone,    //text最低端与label中间线对齐

 

 } UIBaselineAdjustment;    

//设置是否是高亮aLabel.highlighted=YES;//高亮颜色aLabel.highlightedTextColor=[UIColor redColor];//设置阴影颜色aLabel.shadowColor=[UIColor blueColor];//阴影偏移量aLabel.shadowOffset=CGSizeMake(0.5, 0.5);

//是否能和用户交互

aLabel.userInteractionEnabled=YES;

//文字是否可变，默认值是YES 

aLabel.enabled=YES; 

//设置文字过长时的显示格式

 aLabel.lineBreakMode = UILineBreakModeMiddleTruncation; //截去中间

 aLabel.lineBreakMode =UILineBreakModeTailTruncation,//截去尾部 

 aLabel.lineBreakMode =UILineBreakModeHeadTruncation;//截去头部 

aLabel.lineBreakMode=UILineBreakModeCharacterWrap;//保留整个字符

aLabel.lineBreakMode=UILineBreakModeClip;//截去多余部分 

在定义里面允许有以下格式显示：

// NSParagraphStyletypedef NS_ENUM(NSInteger, NSLineBreakMode) {    NSLineBreakByWordWrapping = 0,    // Wrap at word boundaries, default    NSLineBreakByCharWrapping, // Wrap at character boundaries    NSLineBreakByClipping, // Simply clip    NSLineBreakByTruncatingHead, // Truncate at head of line: "...wxyz"    NSLineBreakByTruncatingTail, // Truncate at tail of line: "abcd..."    NSLineBreakByTruncatingMiddle // Truncate middle of line:  "ab...yz"} NS_ENUM_AVAILABLE(10_0,6_0);