Objective-C – Sleep Function

In Objective-C, you can use the sleepForTimeInterval class method of NSThread to sleep the program.

// Sleep the program for 10 second
[NSThread sleepForTimeInterval:10.0];

Multi-line UITableViewCell using UILabel

No need for UITextViews or custom UITableViewCells. You can use standard UITableViewCellStyles and make the detailTextLabel accept multiple lines and specify its line break mode. The code would be:

static NSString *CellIdentifier = @"MyCell"; 
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
 cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2
     reuseIdentifier:CellIdentifier] autorelease];
}
cell.textLabel.text = @"Label';
cell.detailTextLabel.text = @"Multi-Line\nText";
cell.detailTextLabel.numberOfLines = 2;
cell.detailTextLabel.lineBreakMode = UILineBreakModeWordWrap;

You will also need to return a suitable height for the multi-line cell. A height of (44.0 + (numberOfLines - 1) * 19.0) should work fine.

Dynamic UILabel

- (void)loadView
{
    [super loadView];
    //1.UILable的大小自适应实例：
    UILabel *myLabel=[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 2, 2)];//设定位置与大小
    [myLabel setFont:[UIFont fontWithName:@"Helvetica" size:20.0]];//格式
    [myLabel setNumberOfLines:0];//行数，只有设为0才可以自适应
    [myLabel setBackgroundColor:[UIColor clearColor]];//背景色
    myLabel.shadowColor = [UIColor darkGrayColor];//阴影颜色
    myLabel.shadowOffset = CGSizeMake(1.0,1.0);//阴影大小
    
    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];//阴影颜色
     myLabel.shadowOffset = CGSizeMake(2.0,2.0);//阴影大小
    [self.view addSubview:myLabel];
    [myLabel release];
    //2.UILable的基本用法获取自馒头MAN百度空间，感谢馒头MAN
            //空间地址：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)];     
    
    //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--11个";     
    label4.text = @"label4--label4--label4--label4--4个";     
    label5.text = @"label5--label5--label5--label5--label5--label5--6个";     
    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];     
    //设置背景颜色 
    label1.backgroundColor = [UIColor clearColor];
    label2.backgroundColor = [UIColor  colorWithRed:0.5f green:30/255.0f blue:0.3f alpha:0.5f];
    //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];         
    
}