UILabel的常見用法

- (void)loadView
{
    [super loadView];
    //1.UILable的大小自適應實例：
    UILabel *myLabel=[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 2, 2)];//設定位置與大小
    [myLabel setFont:[UIFont fontWithName:@"Helvetica" size:20.0]];//格式
    [myLabel setNumberOfLines:0];//行數，只有設爲0纔可以自適應
    [myLabel setBackgroundColor:[UIColor clearColor]];//背景色
    myLabel.shadowColor = [UIColor darkGrayColor];//陰影顏色
    myLabel.shadowOffset = CGSizeMake(1.0,1.0);//陰影大小
    
    NSString *text = @"abcdefghigklmnopqrstuvwxyz";
    UIFont *font = [UIFont fontWithName:@"Helvetica" size:20.0];
    CGSize size = [text sizeWithFont:font constrainedToSize:CGSizeMake(175.0f, 2000.0f) lineBreakMode:UILineBreakModeWordWrap];
    CGRect rect=myLabel.frame;
    rect.size=size;
    [myLabel setFrame:rect];
    [myLabel setText:text];
     myLabel.shadowColor = [UIColor darkGrayColor];//陰影顏色
     myLabel.shadowOffset = CGSizeMake(2.0,2.0);//陰影大小
    [self.view addSubview:myLabel];
    [myLabel release];
    //2.UILable的基本用法獲取自饅頭MAN百度空間，感謝饅頭MAN
            //空間地址：http://hi.baidu.com/bunsman/blog/item/95777b0ebacf05fe36d122e2.html
    UILabel *label1 = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 40.0, 200.0, 30.0)];     
    UILabel *label2 = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 80.0, 200.0, 50.0)];     
    UILabel *label3 = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 140.0, 200.0, 50.0)];     
    UILabel *label4 = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 200.0, 200.0, 50.0)];     
    UILabel *label5 = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 260.0, 200.0, 50.0)];     
    UILabel *label6 = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 320.0, 200.0, 50.0)];     
    UILabel *label7 = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 380.0, 200.0, 50.0)];     
    
    //設置顯示文字     
    label1.text = @"label1";     
    label2.text = @"label2";     
    label3.text = @"label3--label3--label3--label3--label3--label3--label3--label3--label3--label3--label3--11個";     
    label4.text = @"label4--label4--label4--label4--4個";     
    label5.text = @"label5--label5--label5--label5--label5--label5--6個";     
    label6.text = @"label6";     
    label7.text = @"label7";     
    
    //設置字體:粗體，正常的是 SystemFontOfSize     
    label1.font = [UIFont boldSystemFontOfSize:20];     
    
    //設置文字顏色  
    label1.textColor = [UIColor orangeColor];     
    label2.textColor = [UIColor purpleColor];     
    //設置背景顏色
    label1.backgroundColor = [UIColor clearColor];
    label2.backgroundColor = [UIColor  colorWithRed:0.5f green:30/255.0f blue:0.3f alpha:0.5f];
    //設置文字位置     
    label1.textAlignment = UITextAlignmentRight;     
    label2.textAlignment = UITextAlignmentCenter;     
    //設置字體大小適應label寬度     
    label4.adjustsFontSizeToFitWidth = YES;
    //設置label的行數     
    label5.numberOfLines = 2;     
    
    //設置高亮     
    label6.highlighted = YES;     
    label6.highlightedTextColor = [UIColor orangeColor];     
    
    //設置陰影     
    label7.shadowColor = [UIColor redColor];     
    label7.shadowOffset = CGSizeMake(1.0,1.0);     
    
    //設置是否能與用戶進行交互     
    
    label7.userInteractionEnabled = YES;     
    
    //設置label中的文字是否可變，默認值是YES     
    label3.enabled = NO;     
    
    //設置文字過長時的顯示格式     
    
    label3.lineBreakMode = UILineBreakModeMiddleTruncation;//截去中間     
    //  typedef enum {     
    //      UILineBreakModeWordWrap = 0,     
    //      UILineBreakModeCharacterWrap,     
    //      UILineBreakModeClip,//截去多餘部分     
    //      UILineBreakModeHeadTruncation,//截去頭部     
    //      UILineBreakModeTailTruncation,//截去尾部     
    //      UILineBreakModeMiddleTruncation,//截去中間     
    //  } UILineBreakMode;     
    
    //如果adjustsFontSizeToFitWidth屬性設置爲YES，這個屬性就來控制文本基線的行爲     
    label4.baselineAdjustment = UIBaselineAdjustmentNone;     
    //  typedef enum {     
    //      UIBaselineAdjustmentAlignBaselines,     
    //      UIBaselineAdjustmentAlignCenters,     
    //      UIBaselineAdjustmentNone,     
    //  } UIBaselineAdjustment;     
    
    
    [self.view addSubview:label1];     
    [self.view addSubview:label2];     
    [self.view addSubview:label3];     
    [self.view addSubview:label4];     
    [self.view addSubview:label5];     
    [self.view addSubview:label6];     
    [self.view addSubview:label7];     
    
    [label1 release];     
    [label2 release];     
    [label3 release];     
    [label4 release];     
    [label5 release];     
    [label6 release];     
    [label7 release];         
    
}