UILabel

CGSize labelSize = [str sizeWithFont:[UIFont boldSystemFontOfSize:17.0f]

constrainedToSize:CGSizeMake(280, 100) 

lineBreakMode:UILineBreakModeCharacterWrap];   // str是要显示的字符串

UILabel *patternLabel = [[UILabel alloc] initWithFrame:CGRectMake(35, 157, labelSize.width, labelSize.height)];    

 

patternLabel.text = str;

patternLabel.backgroundColor = [UIColor clearColor];

patternLabel.font = [UIFont boldSystemFontOfSize:17.0f];

patternLabel.numberOfLines = 0;     // 不可少Label属性之一

patternLabel.lineBreakMode = UILineBreakModeCharacterWrap;    // 不可少Label属性之二

[self.view addSubview:patternLabel];

[patternLabel release];

转自：http://blog.csdn.net/xiaobo16/article/details/8227325

文字凹陷效果

UILabel *label= [[UILabelalloc]initWithFrame:CGRectMake(10,10, 300, 100)];

    label.text = @"文字凹陷效果";

   label.shadowColor= [UIColor colorWithRed:0.855green:0.863 blue:0.882alpha:1.0];

   label.textColor= [UIColor colorWithRed:0.298green:0.337 blue:0.424alpha:1.0];

   label.backgroundColor =[UIColor cyanColor];

    [mainView addSubview:label];

   [label release];

    

文字阴影效果

    UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(10, 10,300, 100)];

    label.text = @"文字阴影效果";

   label.textColor= [UIColor colorWithRed:0.4green:0.6 blue:0.1alpha:1.0];

   label.textAlignment=UITextAlignmentCenter;

   label.font = [UIFont fontWithName:[[UIFont familyNames] objectAtIndex:2]size:35];

   label.adjustsFontSizeToFitWidth = YES;

    label.numberOfLines = 0;

    label.tag = 0;

   label6.backgroundColor =[UIColor cyanColor];

    label.shadowColor = [UIColor yellowColor];

    label.shadowOffset = CGSizeMake(3, 3);

    [mainView addSubview:label];

   [label release];

label中文字跑马灯效果

 

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 300, 100)];

   label.text = @"噜啦啦噜啦啦噜啦噜啦噜，噜啦噜啦噜啦噜啦噜啦噜~~~";

    [self.view addSubview:label];

    CGRect frame = label7.frame;

frame.origin.x = -180;

label.frame = frame;

[UIView beginAnimations:@"testAnimation" context:NULL];

[UIView setAnimationDuration:8.8f]; 

[UIView setAnimationCurve:UIViewAnimationCurveLinear]; 

[UIView setAnimationDelegate:self]; 

[UIViewsetAnimationRepeatAutoreverses:NO]; 

[UIView setAnimationRepeatCount:999999]; 

frame = label.frame;

frame.origin.x = 350;

label.frame = frame;

[ UIView commitAnimations ];