［iPhone开发之控件的使用］UILabel的各种属性与方法的使用

#import "LabelTestViewController.h"   
@implementation LabelTestViewController   
/*  
Accessing the Text Attributes  
    text  property    
    font  property    
    textColor  property    
    textAlignment  property    
    lineBreakMode  property      
    enabled  property    
Sizing the Label’s Text  
    adjustsFontSizeToFitWidth  property    
    baselineAdjustment  property    
    minimumFontSize  property   无例  
    numberOfLines  property    
Managing Highlight Values  
    highlightedTextColor  property    
    highlighted  property    
Drawing a Shadow  
    shadowColor  property    
    shadowOffset  property    
Drawing and Positioning Overrides  
    – textRectForBounds:limitedToNumberOfLines: 无例   
    – drawTextInRect:  无例  
Setting and Getting Attributes  
    userInteractionEnabled  property    
*/  
    
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.   
- (void)viewDidLoad {   
    UILabel *label1 = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 20.0, 200.0, 50.0)];   
    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)];   
       
    //设置显示文字   
    label1.text = @"label1";   
    label2.text = @"label2";   
    label3.text = @"label3--label3--label3--label3--label3--label3--label3--label3--label3--label3--label3--";   
    label4.text = @"label4--label4--label4--label4--";   
    label5.text = @"label5--label5--label5--label5--label5--label5--";   
    label6.text = @"label6";   
    label7.text = @"label7";   
       
    //设置字体   
    label1.font = [UIFont boldSystemFontOfSize:20];   
       
    //设置文字颜色   
    label1.textColor = [UIColor orangeColor];   
    label2.textColor = [UIColor purpleColor];   
       
    //设置文字位置   
    label1.textAlignment = UITextAlignmentRight;   
    label2.textAlignment = UITextAlignmentCenter;   
    //设置字体大小适应label宽度   
    label4.adjustsFontSizeToFitWidth = YES;   
       
    //设置label的行数   
    label5.numberOfLines = 2;   
       
    //设置高亮   
    label6.highlighted = YES;   
    label6.highlightedTextColor = [UIColor orangeColor];   
       
    //设置阴影   
    label7.shadowColor = [UIColor redColor];   
    label7.shadowOffset = CGSizeMake(1.0,1.0);   
       
    //设置是否能与用户进行交互   
    label7.userInteractionEnabled = YES;   
       
    //设置label中的文字是否可变，默认值是YES   
    label3.enabled = NO;   
       
    //设置文字过长时的显示格式   
    label3.lineBreakMode = UILineBreakModeMiddleTruncation;//截去中间   
//  typedef enum {   
//      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   
//  } UILineBreakMode;   
       
    //如果adjustsFontSizeToFitWidth属性设置为YES，这个属性就来控制文本基线的行为   
    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];   
       
    [super viewDidLoad];   
}   
  
/*  
// Override to allow orientations other than the default portrait orientation.  
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {  
    // Return YES for supported orientations  
    return (interfaceOrientation == UIInterfaceOrientationPortrait);  
}  
*/  
- (void)didReceiveMemoryWarning {   
    // Releases the view if it doesn't have a superview.   
    [super didReceiveMemoryWarning];   
       
    // Release any cached data, images, etc that aren't in use.   
}   
- (void)viewDidUnload {   
    // Release any retained subviews of the main view.   
    // e.g. self.myOutlet = nil;   
}   
  
- (void)dealloc {   
    [super dealloc];   
}   
@end