UILabel 中Line Breaks属性.-优快云博客

本文详细介绍了UILabel的各种属性及其使用方法，包括文本属性、字体属性、文本颜色属性等，并展示了如何通过不同属性实现文字显示效果的调整。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Clip

Character Wrap

Word Wrap

Truncate Head

Truncate Middle

Truncate Tail

#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:粗体，正常的是 SystemFontOfSize     
    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;    
    UIlabel.backgroudColor=[UIColor clearColor]; //可以去掉背景色   
 
    //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